JPH01279717A - Manufacture of metal-based composite material - Google Patents

Abstract

PURPOSE:To easily manufacture the title material without pressurizing the molten metal of Al, Mg or the like by immersing a molded body constituted of a reinforcing material of the short fiber, whisker, grains, etc., by specific metals and the fine pieces of metal oxide and fluoride into the above molten metal. CONSTITUTION:To an inorganic reinforcing material 12 except metals such as Al2O3 short fiber, SiC whisker and Si3N4 grains, 2wt.%, for the above, of fine pieces 14 of the metal oxide such as Al2O3, ZrO2, Fe2O3, CeO2, TiO2, SnO, Cr2O3 and SiO2 and >=0.1wt.% of the fine pieces 15 of the fluoride contg. alkaline metals, alkaline-earth metals, rare-earth metals, etc., are mixed to prepare a molded body 10. The molded body 10 is immersed into the molten metal 18 of Al, Al alloy, Mg, Mg alloy, etc., in a heat-resistant vessel 16. The wettability between the molded body 10 and the molten metal is good; the molten metal 18 of the Al alloy, etc., permeates into the molded body 10 and is solidified, by which a fiber reinforcing composite material contg. the molten metal of Al alloy, etc., as the matrix can easily be obtd. without pressurizing the molten metal 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composite material, and more particularly to a composite material using an inorganic fiber other than a metal such as ceramic staple fiber as a reinforcing material and an aluminum alloy as a matrix. It relates to a method for manufacturing a base composite material.

Problems to be solved by conventional techniques and inventions For example, the "Aluminum "Forming of composite materials (FRM)"
As described in the booklet entitled, ■
Diffusion bonding method, ■Plasma spray method, ■Vapor phase deposition method,
■Melt infiltration method, ■Electrodeposition method (plating method), etc.As methods for manufacturing fiber-reinforced metal composite materials whose reinforcing fibers are discontinuous fibers, ■Powder metallurgy method, ■Compocasting method, ■
It is known that there are the elution forging method, (1) semi-melting processing method, (2) HIP method, etc.

Sometimes, when the reinforcing fibers are discontinuous fibers, the molten metal forging method (high-pressure casting method) mentioned above has been generally adopted since it is superior in mass production compared to the other methods mentioned above. has been done. However, in the molten metal forging method, the molten matrix metal must be pressurized to very high pressures, which requires large-scale production equipment, which makes the production of composite materials expensive; This is one of the major impediments to the practical application of the material.

Thus, in the production of composite materials when the reinforcing fibers are short fibers, there is a need to reduce the necessary pressure on the molten matrix metal, and even to omit the pressure. In order to achieve this, it is necessary to significantly improve the wettability between the reinforcing fibers and the molten matrix metal.

In view of this demand, for example, Japanese Patent Laid-Open No. 61-295344 proposes the use of an aluminum alloy to which a special element is added as a matrix metal. However, there is a problem in that sufficient wettability cannot be ensured simply by adding a special element to the matrix metal, and the composition of the matrix metal is limited to a specific one.

Furthermore, in the case where the reinforcing fibers are continuous fibers, various methods have been proposed to improve the wettability of the fibers with respect to the molten metal of the matrix metal.
Publication No. 42504 describes a method of applying metal powder to the surface of fibers to improve wettability.
JP-A-50-109904, JP-A-52-28433
No., JP-A-53-38791, JP-A-57-1690
No. 36 and Japanese Unexamined Patent Publication No. 57-169037 describe a method of coating the surface of fibers with a metal to thereby improve wettability.

As described in these publications, when the reinforcing fibers are continuous fibers, the fibers are generally oriented in one direction, so the molten matrix metal penetrates between the individual continuous fibers due to capillary action. Accordingly, the above method can improve the wettability between the fibers and the molten matrix metal.

However, when the reinforcing fibers are short fibers or whiskers, since they are discontinuous, penetration of the molten matrix metal by capillary action cannot be expected. As described in , simply applying methods known to improve the wettability of continuous fibers to short fibers and whiskers cannot sufficiently improve their wettability. Further, when the reinforcing fibers are short fibers or whiskers, it is difficult to cover them with a large amount of metal or apply a large amount of metal powder, and the cost is extremely high. These problems also occur when the surface of the fiber is coated with a metal oxide as described in US Pat. No. 4,376.803 and US Pat. No. 4,569,886.

In addition, Japanese Patent Application Laid-open No. 5
As described in Japanese Patent Application Laid-open No. 7-31466 and Japanese Patent Application Laid-Open No. 62-67133, there is a method in which a reinforcing material molded body is preheated to a predetermined temperature, and then a molten matrix metal is infiltrated into the molded body under pressure. Are known. According to this method, the wettability of the matrix metal with the molten metal is improved by heating the reinforcing material itself to a temperature at which the reinforcing material itself is heated, and the permeability of the matrix metal with the molten metal is improved compared to the case where the molded body is not preheated. . However, in these methods, it is essential to preheat the molded body, and special means are required for that purpose, so these methods also have limitations in streamlining and reducing the cost of manufacturing composite materials. There is.

In addition, Japanese Patent Application Laid-open No. 6, filed by the same applicant as the applicant
As described in Japanese Patent Application No. 1-165265, the reinforcing material is formed by utilizing the oxidation-reduction reaction between the metal oxide contained in the molded material of the reinforcing material and the specific metal element in the matrix metal. Methods are known to improve the permeability of molten matrix metal into the body. However, this method has a problem in that it is not possible to produce a composite material in which the matrix metal is a metal of an arbitrary composition because the elements that undergo redox reactions with each other are limited.

Furthermore, in any of the above-mentioned conventional methods, it is essential to pressurize the molten matrix metal to a relatively high pressure, and therefore, depending on these conventional methods, pressurization of the molten matrix metal may be omitted or However, it is not possible to efficiently manufacture composite materials at a low location by omitting the use of molds, etc. required for pressurization, and a relatively large amount of matrix metal is produced in areas other than the molded body in the mold during each casting. There is a problem in that the yield cannot be improved because it is inevitable that the particles will solidify.

Also, Tokusho 59-500973 Publication and 1985 April 4
Journal of' Materia published in May
ls 5cfence Letters describes a method for producing a composite material in which a reinforcing fiber molded body is pretreated with a fluorine-containing reagent and the molded body is made to contain a molten matrix metal. However, in this method, the reinforcing fibers are limited to those whose main component is carbon or carbide, or whose surface is coated with carbon or carbide, and the processed molded body must be preheated before being impregnated with the molten matrix metal. The problem is that it is necessary to do so.

In view of the above-mentioned problems in conventional composite material manufacturing methods, the inventors of the present application have conducted various experimental studies, and have found that:
By mixing fine pieces of metal oxide and fine pieces of metal fluoride into a molded body of inorganic reinforcing material other than metal,
It has been found that various problems such as those mentioned above can be solved.

The present invention is based on the knowledge obtained as a result of various experimental studies conducted by the inventors of the present invention, and is based on the knowledge obtained as a result of various experimental studies conducted by the inventors of the present invention. The purpose is to provide a method that can efficiently and inexpensively manufacture materials.

Furthermore, the present invention can produce a composite material having a substantially predetermined shape and size very efficiently and without using a mold for pressurizing a molten matrix metal or a mold for manufacturing a composite material having a predetermined shape. The objective is to provide a method that allows devices to be manufactured with very high yields.

Means for Solving the Problems According to the present invention, a molded body containing an inorganic reinforcing material other than metal, fine pieces of metal oxide, and fine pieces of metal fluoride is formed. , a metal base in which at least a portion of the molded body is brought into contact with a molten metal of a matrix metal selected from the group consisting of A15Mg5A1 alloy and Mg alloy, and the molten metal is infiltrated into the molded body without substantially applying pressure. This is achieved by a method of manufacturing composite materials.

Effects and Effects of the Invention According to the method of the present invention, a molded body containing an inorganic reinforcing material other than metal, fine pieces of metal oxide, and fine pieces of metal fluoride is formed, and at least part of the molded body is is brought into contact with the molten matrix metal. The metal fluoride removes the oxide film of the molten matrix metal to improve wetting of the molten metal to the reinforcing material, and a portion of the metal fluoride reacts with a portion of the metal oxide to activate it. The reaction between the activated molten matrix metal and the fine pieces of metal oxide generates heat, which heats the molten metal and the reinforcing material. The wettability of the matrix metal is improved, and as a result, the molten metal of the matrix metal satisfactorily penetrates into the entire molded body.

Therefore, according to the method of the present invention, there is no need to pressurize the molten matrix metal or preheat the reinforcement, and therefore there is no need for extensive installation Q'e- Composite materials in which the matrix metal is well filled between the individual reinforcing materials can be produced more efficiently and at lower cost than conventional methods.

Further, according to the method of the present invention, as described above, the molten metal of the matrix metal and the fine pieces of the metal oxide are activated by the metal fluoride, so that the metal oxide is It is not limited to specific metal oxides as described in Japanese Patent Application No. 1983 and Japanese Patent Application No. 1983.

Furthermore, according to the method of the present invention, as described above, the molten metal of the matrix metal satisfactorily penetrates into the molded body, so that the molded body containing the reinforcing material, fine pieces of metal oxide, and fine pieces of metal fluoride can be formed. If a part of the molded body is formed into a predetermined shape and size and a part of it is brought into contact with the molten matrix metal, the molten matrix metal will quickly permeate the entire molded body in just the right amount, thereby substantially forming the predetermined shape. A composite material of and dimensions is formed. Therefore, a mold is required to pressurize the molten matrix metal and define a predetermined product shape, and a large amount of the matrix metal inevitably solidifies in parts of the mold other than the composite material. Compared to forging method etc.
Composite materials of substantially predetermined shapes and dimensions can be produced efficiently and at low levels with very high yields.

According to the results of experimental research conducted by the inventors of the present application, if the molded body contains fine pieces of metal oxide and metal fluoride, the molten metal of the matrix metal will not enter the molded body. Permeability can be improved if the weight ratio of metal oxide fines to the reinforcement is 2% or more, and the weight ratio of metal fluoride fines to the reinforcement is 0.1% or more. The molten matrix metal can be well penetrated into the molded body. According to one detailed feature of the invention, therefore, the amount of metal oxide fine particles in the compact is set at 2% or more by weight relative to the reinforcing material, and the amount of metal fluoride fine particles in the compact The amount of pieces is set at 0.1% or more in terms of weight ratio to the reinforcing material.

Further, in the method of the present invention, the metal fluoride may be a fluoride of any metal element, but for example, 2 ZrF6
, K2 TiF6 , KAlF4 , K3AI F
6, K2 AlF3 ・H20, C5AI
F4, Cs A IF 5 ・Like H20,
Ti, Zr, Hf, VSNb combined with electrically positive elements such as alkali metals, alkaline earth metals, and rare earth metals
Preferably, it is a fluoride containing a transition metal such as STa or AI. According to another detailed feature of the invention, therefore, the metal fluoride is a fluoride containing a transition metal or AI in combination with an electrically positive metal element.

Further, in the method of the present invention, the reinforcing material may be in any form, but the method of the present invention uses short fibers, whiskers, particles, or their like, rather than the case where the reinforcing material is long fibers. This is particularly useful when the mixture is a mixture. According to yet another detailed feature of the invention, therefore, the reinforcing material is selected from the group consisting of short fibers, whiskers, particles and mixtures thereof.

Also, according to the results of experimental research conducted by the inventors of the present application,
Even if the total volume fraction of the reinforcing material, fine pieces of metal oxide, and fine pieces of metal fluoride in the molded body is too low or conversely too high, the molten metal of the matrix metal can penetrate well into the molded body. things become difficult.

According to yet another detailed feature of the invention, the combined volume fraction of reinforcing material, metal oxide fines and metal fluoride fines in the compact is therefore between 4 and 85%, preferably 5
It is set to ~80%.

Also, according to the results of experimental research conducted by the inventors of the present application,
Even if the volume fraction of fine metal oxide particles and fine metal fluoride particles contained in the molded body is high, the molten metal of the matrix metal can be well penetrated into the molded body, but the amount of these particles As the number of reinforcing materials increases, the volume fraction of the reinforcing material decreases relatively, and depending on the type of reinforcing material, the composition of the matrix metal changes greatly. Therefore, according to yet another detailed feature of the invention, the volume fraction of metal oxide fine particles in the compact is less than 45%, preferably 40%.
% or less, and the volume fraction of fine metal fluoride particles is 3.
It is set to 0% or less, preferably 20% or less.

According to yet another detailed feature of the invention, the molded body has a predetermined shape and dimensions, and only a portion thereof is immersed in the molten metal of the matrix metal.

According to this method, a composite material of a predetermined shape and size can be produced efficiently and with a very high yield without requiring a mold or the like to pressurize the molten matrix metal or define a predetermined product shape. can be manufactured.

In the method of the present invention, it is not necessary to preheat the molded body, but when preheating the molded body to improve the wettability of the reinforcing material and fine pieces of metal oxide, the temperature is lower than that of the conventional method. Preferably, the temperature is lower than that employed. Further, the fine pieces of metal oxide and fine pieces of metal fluoride in the present invention may be in any form such as short fibers, whiskers, or powder.

In addition, Japanese Patent Application No. 1983 filed by the applicant on the same date as the present application describes a method of mixing fine pieces of metal fluoride into a molded reinforcing material.
The patent application No. 1983 and Japanese Patent Application No. 1983 describe a method for manufacturing a composite material in which fine pieces of a specific metal oxide are mixed into a reinforcing material molded body.
The patent specification discloses a method for producing a composite material in which fine pieces of metal oxide and fine pieces of metal fluoride are mixed into a molded body of reinforcing material made of metal.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be explained in detail below by way of example embodiments with reference to the accompanying figures.

Example 1 Short alumina fibers with an average fiber diameter of 3 μm and an average fiber length of 1 mm (Saphir RGJ, 95% A manufactured by ICI) were used as a reinforcing material.
l2O3, 5%5i02), fiber diameter 0°1~1,08m
Silicon carbide whiskers (manufactured by Tokai Carbon Co., Ltd.) with a fiber length of 50 to 200 μm and silicon nitride particles (manufactured by Kojundo Kagaku Co., Ltd.) with an average particle diameter of 10 μm were prepared.

Next, ■ fine pieces of 2ZrF6 and oxide (
A1203, ZrO2, Fe203, CeO2,
T t O2, S n Os Cr 203 , S t
02) sol (manufactured by Nissan Chemical Co., Ltd.), compression molding the mixture, drying the molded bodies, and then molding each molded body with a concentration of 13g/100CC of approximately 90%
Immerse it in a 2ZrF5 aqueous solution at a temperature of about 40°C.
By cooling to ℃, 2ZrF (1) was finely recrystallized in the molded body, thereby forming a molded body consisting of a reinforcing material, fine pieces of the metal oxide, and fine pieces of the metal fluoride. .

Also ■The above reinforcement material and average diameter 20μ11 average length 100μ
m KA I F4 powder (manufactured by Furukawa Electric Co., Ltd.), Ta205 powder with an average particle size of 1.5 μm (manufactured by Mitsui Kinzoku Co., Ltd.), Nb2O5 powder (manufactured by Mitsui Kinzoku Co., Ltd.) with an average particle size of 5 μl, particle size 1 ~ 2 μm PbO powder (manufactured by Kojundo Kagaku Co., Ltd.), v20s powder with an average particle size of 5 μm (manufactured by Kojundo Kagaku Co., Ltd.), Bi2O3 powder with an average particle size of 6 μm (manufactured by Kojundo Kagaku Co., Ltd.), average particle size 10 μm ZnO powder (
(manufactured by Kojundo Kagaku Co., Ltd.), MnO2° with a particle size of 1 to 2 μm
Powder (manufactured by Kojundo Kagaku Co., Ltd.), average particle size 43 μl B
2O3 powder (manufactured by Kojundo Kagaku Co., Ltd.), average particle size 3 μm
M n O3 powder (manufactured by Nippon Shinkinzoku Co., Ltd.), WO3 powder with an average particle size of 0.55 μm (manufactured by Nippon Shinkinzoku Co., Ltd.)
, CO3O4 powder with an average particle size of 74 μm (manufactured by Sumitomo Metal Mining Co., Ltd.), NtO powder with an average particle size of 1.6 μm (manufactured by Sumitomo Metal Mining Co., Ltd.), MgO powder with an average particle size of 0.05 μI (manufactured by Ube Industries, Ltd.) ) in water, compression molding the mixture, and drying the molded body to form a molded body consisting of the reinforcing material, fine pieces of the metal, and fine pieces of the metal oxide. Formed.

FIG. 1 is a perspective view showing an example of the molded body 10 thus formed. In the figure, 12 represents a reinforcing material, 14 represents fine pieces of metal oxide, and 15 represents fine pieces of metal fluoride. ing. In this case, alumina short fibers, SiC whiskers, Si
The volume fractions of 3N4 particles are 7%, 15%, and 30%, respectively, and the weight ratio of metal oxide fines to reinforcement is 5.
%, and the weight ratio of metal fluoride to reinforcement is 3%
The total volume fraction was 7.2 to 34.1%.

Each compact also had dimensions of 20 x 20 x 4011 II, and the metal oxide particles and metal fluoride particles were substantially uniformly dispersed throughout the compact.

Next, as shown in FIG. 2, each molded body 10 is placed in a molten metal container 16 without preheating, and 70
The molten metal 18 of the matrix metal at 0° C. was drained, and the molten metal was solidified without applying pressure. In this case, aluminum alloy (JIS standard AC4D) and magnesium alloy (JIS standard MC-2) were used as matrix metals.

Next, the composite material 20 formed in the original molded body is cut out from each of the solidified bodies produced as described above, and the central part thereof is cut in the transverse direction as shown by the imaginary line 22 in FIG. The quality of each composite material was evaluated by cutting the composite material, polishing the cut surface, and performing physical observation and observation using an optical microscope.

The results of these evaluations are shown in Tables 1 to 3 for the cases where the reinforcing materials are short alumina fibers, silicon carbide whiskers, and silicon nitride particles, respectively. In these tables, ◎ indicates that both the macroscopic composite state and the microscopic composite state are good, O indicates that the macroscopic composite state is good, and △ indicates that the macroscopic composite state is good. This indicates that only a certain degree of compositing has been achieved, and x indicates that no conjugation has occurred at all (the same applies to Table 5, which will be described later).

From Tables 1 to 3, it can be seen that regardless of the type and volume ratio of the reinforcing material, good composite formation is achieved when the molded body contains fine pieces of metal oxide and metal fluoride.

Comparative Example 1 A molded body identical to that of Example 1 except that it does not contain fine pieces of fluoride was formed, and the molded bodies were composited in the same manner as in Example 1. manufacture materials,
The quality of each composite material was evaluated in the same manner as in Example 1. The results of these evaluations are shown in Tables 1-3.

From Tables 1 to 3, it can be seen that good composite formation cannot be achieved when the molded body does not contain fine pieces of metal fluoride. Furthermore, from a comparison between this comparative example and Example 1, it is found that when the molded article contains a metal fluoride, fine particles of the metal oxide are wetted by the reinforcing material in the above-mentioned patent application No. 1983. Good compositing was achieved even with metal oxides which are considered to have no effect on improving the product, and it can therefore be seen that the fine pieces of metal oxide may be an oxide of any metal.

Comparative Example 2 A molded body consisting only of the same alumina short fibers, silicon carbide whiskers, and silicon nitride particles as the reinforcing material used in Example 1 above, and having volume percentages of 5%, 25%, and 50%, respectively. was formed, and an attempt was made to manufacture a composite material using the same procedure and conditions as in Example 1 for each molded body. However, as shown in Tables 1 to 3, good composite formation was not achieved in any of the molded bodies.

In addition, using each of the molded bodies of the above-mentioned comparative examples, composites were made in the same manner and under the same conditions as in Example 1, except that the molten matrix metal was pressurized at various pressures using a high-pressure casting device. An attempt was made to manufacture the material.

As a result, it was found that in order to achieve good composite formation, it was necessary to pressurize the molten matrix metal at a pressure of at least 500 kg/on2.

Example 2 The effect of containing fine pieces of metal oxide and fine pieces of metal fluoride in the molded body of the reinforcing material was demonstrated in Example 1 described above.
We investigated reinforcement materials and matrix metals other than the reinforcement materials and matrix metals used in this study.

First, a molded body consisting of the reinforcing material shown in Table 4 below, fine pieces of metal oxide and fine pieces of metal fluoride shown in Table 5 is formed, and the molded body and the fine pieces of metal fluoride shown in Table 5 are Composite materials were manufactured in the same manner as in Example 1 using the molten matrix metal, and each composite material was manufactured in Example 1.
The quality of the composite condition was evaluated in the same manner as in the case of .

For comparison purposes, we formed identical compacts except that they did not contain any metal fluoride particles, and used these compacts to manufacture composite materials. The quality of the condition was evaluated.

The results of these evaluations are shown in Table 5 below. From Table 5, when the molded body contains fine pieces of metal oxide and fine pieces of metal fluoride, regardless of the types of reinforcing material, metal oxide, and metal fluoride, and the composition of the matrix metal, figure,
It can be seen that good compositing can be achieved.

Although not shown as an example, even when the reinforcing material is a long fiber such as carbon fiber, silicon carbide fiber, or alumina fiber, fine pieces of metal oxide and metal fluoride may be added to the surface of the fiber. It has been found that good compositing can be achieved if fine particles of metal oxides and fine particles of metal fluoride are applied or mixed into the molded bodies.

Example 3 From the combination of reinforcing material and metal oxide fine pieces in which a good composite was achieved in the above-mentioned Example 1 (combinations in which the composite state is all ◎ in Tables 1 to 3) In a mixture in which the volume fraction of the reinforcing material, the weight ratio of the fine pieces of metal oxide to the reinforcing material, and the weight ratio of the fine pieces of metal fluoride to the reinforcing material are the same as in Example 1, FIG. A cylindrical molded body 24 having an outer diameter of 40 mm, an inner diameter of 30 mm, and a length of 50 mm was formed as shown in FIG. In addition, in Figure 4, 26.28
and 29 indicate reinforcing material, fine pieces of metal oxide, and fine pieces of metal fluoride, respectively. Further, as matrix metals, molten metals of aluminum alloy (JIS standard AC4D) and magnesium alloy (JIS standard MC-2), which are the same as the matrix metals used in Example 1, were prepared.

Next, as shown in FIG. 5, the upper end of each molded body 24 is held in a tweezers-like holder 30 without preheating, and the lower end of each molded body is heated to 700° C. stored in a molten metal container 32. It was brought into contact with the molten metal 34 of the matrix metal. Then, the molten matrix metal permeated the entire molded body from the lower end to the upper end of each molded body within 7 to 25 seconds.

After the molten metal completely permeated the entire molded body, the molded body was separated from the molten metal as shown in FIG. 6, and the molten metal was allowed to solidify in that state. In this case, the molten metal remains attached to the molded body due to surface tension until it solidifies.
There was virtually no dripping from the molded article.

Next, when the dimensions of the cylindrical body made of composite material thus manufactured were measured, the outer diameter, inner diameter, and length were each 39 to 4.
1+ nm, 28-30 m1+, 48-50 ff1 m, and each cylinder was found to have substantially the same shape and dimensions as the original compact.

Further, when each cylinder was cut and the composite state thereof was investigated, it was confirmed that the matrix metal was well filled to the surface of each cylinder without excess or deficiency.

From the above explanation, according to the present invention, it is possible to produce a composite material in which the matrix metal is well filled between individual reinforcing materials without pressurizing the molten metal of the matrix metal, more efficiently and at a lower cost than with conventional methods. It will be understood that composite material castings of predetermined shapes and dimensions can be produced very efficiently, inexpensively, and with high yields without using molds or the like.

Although the molded bodies were not preheated in Examples 1 to 3 above, it was confirmed that good composite formation could be achieved even when the molded bodies were preheated in these Examples. ing.

Although the present invention has been described above in detail with reference to several embodiments, the present invention is not limited to these embodiments, and various other embodiments are possible within the scope of the present invention. It will be clear to those skilled in the art that

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[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a molded body made of reinforcing material, fine pieces of metal oxide, and fine pieces of metal fluoride, and FIG. 2 shows a method of the present invention using the molded body shown in FIG. Figure 3 is a perspective view showing the composite material manufactured by the method shown in Figure 2;
The figure is a perspective view showing a cylindrical molded body made of reinforcing material, fine pieces of metal oxide, and fine pieces of metal fluoride, and Figure 5 shows the state in which the lower end of the molded body is immersed in the elution of matrix metal. FIG. 6 is an illustration showing a state in which the compact is pulled up from the molten matrix metal. 10... Compression molded body, 12... Reinforcement material, 14...
Fine pieces of metal oxide, 15... Fine pieces of metal fluoride. 16... Mold, 18. Molten matrix metal, 20
... Composite material, 24 ... Compression molded body, 26 ... Reinforcement material. 28... Fine pieces of metal oxide, 29... Fine pieces of metal fluoride, 30... Holder, 32... Molten metal container, 34... Molten metal of matrix metal Fig. 1 18... Matrix Melting of metal, S Fig. 2 Fig. 3 Kuku Fig. 4 Fig. 5 j Fig. 6 - Molded body reinforcement material - Fine pieces of metal oxide 29... Fine pieces of metal fluoride 34 Melting of matrix metal, I

Claims (1)

[Claims] Inorganic reinforcing material other than metal, fine pieces of metal oxide,
A molded body containing fine pieces of metal fluoride is formed, and at least a part of the molded body is made of Al, Mg, Al alloy, and Mg.
A method for producing a metal matrix composite material, which comprises contacting a molten metal of a matrix metal selected from the group consisting of alloys, and allowing the molten metal to infiltrate into the molded body without substantially applying pressure.