JPS596177B2 - Method for rapidly cooling an object after heating using an arch-image furnace - Google Patents

Description

[Detailed Description of the Invention] In the process of recent rapid technological innovation, amorphous inorganic substances, namely amorphous metals, alloys, non-metallic inorganic substances,
This is largely due to the emergence of such amorphous composite materials.

The progress of these amorphous materials is due solely to the development of heating and rapid cooling techniques during their production. However, there are three types of conventional techniques in this field. In other words, the object is placed in a crucible and heated by a plasma arc, and a centrifugal quenching method using the inner wall of a drum, a gas gun or a piston anvil, or 1-
A method that combines the quenching method using the outer surface of two rolls, etc. A method that combines the quenching method of the above method (heating the object placed in the crucible with a halogen lamp and the method described above), ←→High frequency induction heating There was a method that combined the rapid cooling method and the above-mentioned quenching method. However, in the method (2), carbon is added to the electrode because the plasma arc used as a means of heating is unstable, but because of this, fine particles of dust generated from the arc adhere to the reflector, which deteriorates the reflectance of the light heat rays. In addition to being difficult to maintain high temperatures, it cannot be used for objects that react with crucibles at high temperatures. Furthermore, the desired molten material cannot be discharged from the nozzle of a conventional crucible at such a high speed, and the heating and cooling locations must be separated to some extent, making it difficult to make various materials amorphous. However, it has many drawbacks such as an insufficient cooling rate. In addition, in the method (mentioned), heating with a halogen lamp is stable, but since the light emitted in halogen is relatively low temperature, the image does not reach a relatively high temperature and only reaches about 1800℃, so Al2O3 or 3AIl203/2Si02 It is not possible to melt substances with high melting points such as. In addition, it has many drawbacks similar to the methods described above. In addition, although a stable high temperature can be obtained with the method ←→, it cannot be used for objects that will react with a crucible because it always requires a container or crucible to contain the object without conductivity. In addition, since the crucible was used, the heating and cooling locations were separated, so the cooling rate was not very high. Therefore, in the conventional method, since a crucible is used, it is often impossible to prevent reaction with the target substance, and it is generally not possible to produce an amorphous material from a substance with a high melting point of 1800° C. or higher. The present inventors have conducted various studies with the aim of producing amorphous amorphous substances with high melting points that could not be obtained using conventional methods. The present invention was completed by combining heating and melting of the target object with an ultra-rapid cooling method.

In other words, a rare gas lamp, such as a xenon lamp, is placed horizontally at the first focal point of a light receiving mirror, and a flat reflecting mirror is placed outside the second focal point with the plane facing upward at about 45 points, and an emitting mirror is placed directly above the reflecting mirror facing downward. Using an image furnace, at the imaging position of the radiation mirror,
A heat-resistant glass tube with a water-cooled copper target inside, a gas gun at the bottom, and a water-cooled copper substrate with an object placed on it is placed, and after heating and melting the object by irradiating it with a concentrated beam of light, the gas gun This method involves spraying water onto the inner surface of a water-cooled copper target to rapidly cool it.

The top surface of the bottom water-cooled copper base is formed as part of a spherical inner surface with a large radius, and a gas muzzle is provided in the center to connect an external high-pressure gas storage device and a cold water pipe.

The water-cooled copper target is a water jacket having a cylindrical or nearly spherical shape, and an opening of a suitable size is provided at the bottom for the entrance of the molten object and the discharge of the cooled object. The water-cooled copper target is suspended from above and connected to a cold water pipe. These pipings are flexible, and after placing the object on the water-cooled copper board, the pressure is adjusted depending on the nature of the object to prevent evaporation and oxidation at high temperatures. , an inert gas or the like is filled in a heat-resistant glass tube. The heat-resistant glass tube and the water-cooled copper base or upper cover have a structure that allows them to be tightened with screws or bolts using gaskets. If continuous operation is required, a plurality of heat-resistant glass tubes are prepared and placed on a trolley, and the tubes are pulled by a wire on a rail by a mini motor or manually, and are alternately reciprocated. Therefore, flexible piping is provided with a length corresponding to the reciprocating movement. Next, in order to accurately match the position of the object with the position of the image,
An adjustment device in the Z-axis direction is provided and fine adjustments are made using a dial. In this way, when the radiation mirror irradiates the object with a concentrated beam of light, an image is generated in the heat-resistant glass tube using the rare gas discharge lamp as the heat source, which generates an extremely high temperature of 2000 to 3500°C, which is difficult to process in the past. The target object can also be melted.

Therefore, the object in liquid form becomes approximately spherical due to surface tension and is located at the center of the concave copper base. After that, if there is pressure inside the heat-resistant glass tube, release it, open the main valve of the gas gun, and inject high-pressure gas from the narrow gas muzzle to spray the target object onto the inner surface of the water-cooled copper target. Since it is in liquid form, it forms a thin layer that sticks to the inner surface of the target and is rapidly cooled. A feature of the present invention is that the water-cooled copper target instantly adheres to the inner surface of the water-cooled copper target in the form of flakes from very high temperatures, so the heat transfer area per unit weight of the target is extremely large. The speed is extremely high, exceeding the conventional technology level, and is 1060K/Sec.
reach. Furthermore, since a crucible is not required even for non-conductive substances, there is an advantage that the target object can be melted without contamination from the crucible. According to the method of the present invention, amorphous amorphous can be reliably produced by heating the object using an arc image furnace as described above and then ultra-quenching the object by blowing it onto the inner surface of a water-cooled copper target with a gas gun. I can do it. Embodiment FIG. 1 is a partially cross-sectional explanatory diagram of an arc image furnace used for carrying out an example of the method of the present invention.

First, the photothermal rays emitted from the xenon lamp 1 are reflected by the light receiving mirror 2, then approximately upwardly reflected by the plane reflecting mirror 3, and then condensed by the emitting mirror 4 at its imaging position 5. In the heat-resistant glass tube 6, an object 9 was placed in advance near the center of the upper surface of a water-cooled copper substrate 8, which was airtightly fitted with a screw using a gasket 7 at the bottom thereof. In this example, a spinel-based composition was selected as the target material. A lid 10 is hermetically fitted to the upper part of the heat-resistant glass tube 6 with a screw using a gasket 7, and a water-cooled copper target 11 is suspended and fixed under the lid 10 with the opening facing straight down. An inlet cold water pipe 12 and an outlet cold water pipe 12' are installed through the lid. Water-cooled copper board 8
An inlet cold water pipe 13, an outlet cold water pipe 13', a high pressure inlet gas pipe 14, a high pressure outlet gas pipe 14', and a high pressure gas pipe 15 for a gas gun are attached to the. FIG. 2 is an enlarged partial vertical cross-sectional view of the heat-resistant glass tube and its attachments. The heat-resistant glass tube 6 is then loaded onto a cart 16, pulled on a rail 19 by a mini motor 17 and a wire 18, and transported to the vicinity of the imaging position 5. Thereafter, the XYZ axis adjusting device 20 performs fine adjustment using a dial in order to precisely align the position of the object 9 with the imaging position 5. When the photothermal rays are thus focused on the object 9, the temperature of the object 9 becomes even higher, reaching 3050° C. as measured by an optical pyrometer, since the inside of the heat-resistant glass tube is in a high-pressure gas atmosphere. The spinel object 9 was completely melted into a spherical shape and settled in the center of the water-cooled copper substrate 8. Next, open the valve at the end of the high-pressure gas discharge pipe 14' to bring it to normal pressure. Immediately open the base of the high-pressure gas pipe 15 for the gas gun at once and blow up the object 9 onto the upper inner surface of the water-cooled copper target 11. It was flaked and quenched. The cooling rate is 10
It was estimated to be about 60K/Sec. Further, when the spinel material of the object 9 after cooling was examined by an X-ray diffraction test, it showed a smooth X-ray diffraction pattern as shown in FIG. It was completely different from the diffraction diagram, and it was confirmed that most of the material was amorphous, so it was confirmed that it was spinel-based amorphous. Based on the above, the effects of the present invention are as follows.

Since a 1 xenon lamp was used and the imaging point was covered with a heat-resistant glass tube, this type of arc image furnace could melt high-melting-point substances at high temperatures that could not be obtained with the prior art.

2. According to the method of the present invention, all materials from conductors to insulators can be heated and melted in any atmosphere without a crucible, so the problem of contamination of objects due to crucibles as in the prior art is solved. Ru.

3. In the conventional method, the molten object is cooled by moving it around the nozzle of the crucible after a short period of time, so the cooling rate is no more than about 1030 K/Sec, but in the method of the present invention, the object is instantaneously moved with a gas gun. Since the thin film is attached to the inner surface of a water-cooled copper target, the cooling rate is much higher than that of the conventional method, reaching about 1060 K/Sec.

4. The method of the present invention can ultra-rapidly cool a target object at a rate far exceeding that of conventional techniques, so it is possible to obtain amorphous or metastable materials with high melting points, which were previously unobtainable. It can greatly contribute to the advancement of the latest technology as a method for producing excellent materials such as other electronic materials or materials for optical devices.

It should be noted that the above-mentioned embodiment is only an example of implementing the present invention.
The technical scope of the present invention is not limited to the scope of the above embodiments.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional explanatory view of an arc image furnace used in carrying out an example of the method of the present invention. FIG. 2 is also an enlarged partial vertical cross-sectional view of the heat-resistant glass tube and its accessories. FIG. 3 is an X-ray diffraction diagram of spinel-based amorphous obtained by the method of the present invention, and FIG. 4 is an X-ray diffraction diagram of a spinel-based crystalline material. In each figure, 1 is a xenon lamp, 2 is a receiver mirror, 3 is a plane reflector, 4 is a radiation mirror, 5 is an imaging position of the radiation mirror, 6 is a heat-resistant glass tube, 7 is a packing, 8 is a water-cooled copper board, 9 is the object, 10 is the lid, 1
1 is the water-cooled copper target, 12 is the inlet cold water pipe of the water-cooled copper target, 12' is the same outlet cold water pipe, 13 is the inlet cold water pipe of the water-cooled copper base, 13' is the same outlet cold water pipe, 14 is the high pressure inlet gas pipe, 14 ' is a high-pressure outlet gas pipe, 15 is a high-pressure gas pipe for a gas gun, 16 is a trolley, 17 is a mini motor, 18 is a wire, 19 is a rail, and 20 is an XYZ axis position adjustment device.

Claims (1)

[Claims] 1 Using an arc image furnace, near the imaging position,
A covered heat-resistant glass tube is airtightly bonded to a water-cooled copper substrate at the bottom thereof, a water-cooled copper target having a downward opening is suspended inside the heat-resistant glass tube, and the upper surface of the water-cooled copper substrate is formed in a concave shape. Then, place an object in contact with the gas muzzle that faces upward in the center, match the position of the object with the imaging position, and concentrate the photothermal rays of the image furnace to focus on the object. A method for rapidly cooling an object after heating using an arc image furnace, which comprises heating and melting the object, and then spraying the object onto the inner surface of a water-cooled copper target using a gas gun to rapidly cool the object.