WO2021132003A1 - SiCとSiによる混合部材および製造方法 - Google Patents
SiCとSiによる混合部材および製造方法 Download PDFInfo
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- WO2021132003A1 WO2021132003A1 PCT/JP2020/047111 JP2020047111W WO2021132003A1 WO 2021132003 A1 WO2021132003 A1 WO 2021132003A1 JP 2020047111 W JP2020047111 W JP 2020047111W WO 2021132003 A1 WO2021132003 A1 WO 2021132003A1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/36—Carbides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/653—Processes involving a melting step
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
Definitions
- the present invention relates to a mixing member, and particularly relates to a mixing member using SiC (silicon carbide) and Si (silicon) as raw materials, and a method for producing the same.
- SiC Silicon carbide
- Patent Document 1 Crystallized SiC cannot be melted at high temperatures, so it may be used as a powder by crushing it.
- the technique disclosed in Patent Document 1 is that SiC powder is mixed with a thermosetting resin and heat-pressed to form a porous member, which is impregnated with Si (silicon: Silicon) to obtain SiC / Si. It constitutes the composite material of.
- the SiC / Si composite material constructed in this way is lighter in weight, has higher specific rigidity, and has a lower coefficient of thermal expansion than metal materials, so it is said that demand is increasing as a structural material in the industrial field and the like.
- Patent Document 1 there is a possibility that the discarded SiC member can be reused.
- a means of forming a porous resin using a resin as a medium and impregnating Si is adopted. Therefore, the heat resistance is lower than that of SiC or Si, and there is a concern that it may deteriorate over time. Further, since the structure is such that Si is permeated into the inside by impregnation, there is a problem that it is difficult to form a thick solid material.
- an object of the present invention is to provide a mixing member made of SiC and Si, which can be constructed without using a resin as a medium and regardless of its form, and a method for producing the same.
- the SiC and Si mixed member according to the present invention for achieving the above object is characterized in that chip-shaped or powder-shaped SiC members are scattered inside the SiC member having a polycrystalline structure.
- the SiC and Si mixing member having the above-mentioned characteristics may have a SiC layer formed on the surface thereof.
- the density of the surface of the mixing member can be increased.
- the method for manufacturing a mixed member made of SiC and Si according to the present invention for achieving the above object includes a preparation step of preparing a chip-shaped or powder-shaped Si member and a chip-shaped or powder-shaped SiC member. It has a heating step of raising the temperature of the mixed material of the Si member and the SiC member to the melting temperature of the Si member, and a cooling step of recrystallizing the melted Si member in a state of including the SiC member. It is characterized by that.
- the Si member and the SiC member prepared in the preparation step are placed in a predetermined container, and the Si member is placed in the predetermined container. It is preferable to further have a stirring step of mixing the SiC member with the SiC member as a solid. According to having such a feature, the degree of mixing (degree of scattering) of SiC with respect to Si becomes good.
- the SiC member in the heating step, may be scattered in the Si member by utilizing the convection of the Si member. .. With such a feature, it is possible to disperse SiC in Si even if the stirring step is omitted.
- a surface treatment step of forming a SiC coat layer on the surface may be provided after the cooling step.
- the SiC and Si mixed member having the above-mentioned characteristics and the manufacturing method thereof, it can be configured without using a resin as a medium and regardless of its form.
- SiC / Si mixed member 10 the configuration of the SiC / Si mixing member (hereinafter, referred to as SiC / Si mixing member 10) according to the present embodiment will be described.
- the shape is a rectangle (cube), but the appearance shape is not limited.
- the SiC / Si mixing member 10 is a mixing member in which the base material 12 is Si and the filler 14 is SiC.
- the SiC / Si mixing member 10 of the form shown in FIG. 1 chip-shaped SiC pieces are scattered inside the polycrystalline Si.
- the distribution density of SiC as the filler 14 is not limited, and can be changed depending on the characteristics desired for the SiC / Si mixing member 10.
- a member having a characteristic of lowering is constructed.
- the density of SiC when the density of SiC is coarse, a member having characteristics such as improvement in workability and reduction in weight is configured as compared with a single product of SiC.
- the characteristics of the SiC / Si mixing member 10 according to the present embodiment can be arbitrarily adjusted by the mixing ratio of the base material 12 and the filler 14. Further, since the constituent members are only Si and SiC, the heat resistance can be improved as compared with the conventional technique of forming the shape of SiC using a resin as a medium.
- the SiC coating layer 16 may be provided on the surface of the SiC / Si mixing member 10. This is because the surface density can be increased by such a configuration.
- SiC scattered in Si which is the base material 12 as the filler 14 is in the form of chips.
- SiC may be in the form of powder.
- the volume of each SiC becomes very small. Therefore, the influence of stress caused by the difference in the coefficient of thermal expansion from Si, which is the base material, can be reduced.
- the SiC as the filler 14 into a powder form, it is possible to extremely increase the mixing ratio of the SiC.
- a first manufacturing method of the SiC / Si mixing member will be described with reference to FIGS. 3 to 6.
- a chip-shaped Si chip-shaped base material 12a
- a chip-shaped SiC filler 14
- the container 18 is made of a member having heat resistance equal to or higher than the melting point (1414 ° C.) of Si, which is the chip-shaped base material 12a, and does not cause deformation or property change.
- quartz softening point of about 1600 ° C. to 1700 ° C.
- graphite sintered SiC
- CVD-SiC or the like
- the chip-shaped base material 12a and the filler 14 placed in the container 18 are mixed.
- the degree of mixing between the base material 12 and the filler 14 becomes good. (Preparation process, stirring process).
- the chip-shaped base material 12a and the filler 14 placed in the container 18 are heated. It is desirable that heating be performed in an inert atmosphere.
- the heating temperature is set to be equal to or higher than the melting point (1414 ° C.) of Si which is the chip-shaped base material 12a, the softening point of the container 18 (for example, 1600 ° C. to 1700 ° C. when the container 18 is quartz), and the SiC which is the filler 14.
- the temperature is set below the sublimation point (for example, 2000 ° C. or higher).
- the chip-shaped base material 12a When the chip-shaped base material 12a is melted, it may be subjected to a degassing treatment by vibrating it with a vibration exciter or an ultrasonic device (both not shown) (heating step: see FIG. 5).
- the chip-shaped base material 12a is melted, the filler 14 is scattered in the base material 12, and then the base material 12 in the molten state is cooled and recrystallized (solidified).
- the cooling rate during cooling varies depending on the form and heat capacity of the SiC / Si mixing member 10, and is not uniformly determined, but is appropriate for the portion having the largest cross-sectional area and the largest heat capacity in the desired form.
- the temperature may be lowered at a rate that is recognized as. This is because when the temperature lowering rate is adjusted to the portion having a small heat capacity, the temperature difference between the inside and the outside becomes large in the portion having a large heat capacity, which causes cracks and the like.
- the recrystallized Si (base material 12) has a polycrystalline structure (cooling step).
- the SiC / Si mixing member 10 is completed by removing the container 18 (see FIG. 6).
- the SiC / Si mixed member 10 may be subjected to surface treatment such as cutting, polishing, or coating, if necessary.
- the first manufacturing method includes a stirring step of mixing the chip-shaped base material 12a and the filler 14 inside the container 18 in the preparation step.
- the stirring step is not always necessary.
- the heating step convection occurs in the molten base material 12 (liquid Si). If the filler 14 can be scattered in the base material 12 by this convection, the stirring step can be omitted. Scattering of the filler 14 by convection is considered to be effective when the filler 14 is in the form of powder.
- the filler 14 in constructing the SiC / Si mixing member 10, is described so as to be evenly mixed with the base material 12.
- the distribution ratio of the filler 14 may be intentionally biased.
- the characteristics can be improved by concentrating SiC, which is a filler 14, on the side surface to be etched or a specific portion.
- SiC / Si mixing member 10 SiC / Si mixing member, 12 base material, 12a chip-shaped base material, 14 filler, 16 SiC coat layer, 18 container.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Ceramic Products (AREA)
- Silicon Compounds (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
まず、図1を参照して、本実施形態に係るSiCとSiによる混合部材(以下、SiC/Si混合部材10と称す)の構成について説明する。なお、図1では、その形態を矩形(立方体)としているが、その外観形態については、限定されるものでは無い。
このように、本実施形態に係るSiC/Si混合部材10は、基材12とフィラー14の混合比率により、任意に特性を調整することができる。また、構成部材をSiとSiCのみとしているため、樹脂を媒体としてSiCの形状形成を行う従来技術に比べ、耐熱性を高めることができる。
上記実施形態では、フィラー14として基材12であるSi中に散在させるSiCは、チップ状である旨記載した。しかしながら、SiCは、パウダー状としても良い。散在させるSiCをパウダー状(粉体)とすることで、個々のSiCの体積が微小となる。よって、基材であるSiとの熱膨張率の違いによって生じる応力の影響を小さくすることができる。
次に、図3から図6を参照して、実施形態に係るSiC/Si混合部材の第1の製造方法について説明する。まず、図3に示すように、チップ状のSi(チップ状基材12a)と、チップ状のSiC(フィラー14)を準備し、これを容器18に入れる。ここで、容器18は、チップ状基材12aであるSiの融点(1414℃)以上の耐熱性を有し、変形や性質変化を生じさせない部材により構成する。例えば、石英(軟化点1600℃~1700℃程度)や、グラファイト、焼結SiC、CVD-SiCなどであれば良い。
このような工程を経て製造されるSiC/Si混合部材10によれば、樹脂を媒体とすることなく構成することができるため、良好な耐熱性を得ることができる。また、基材12となるSiを溶融させてフィラー14となるSiを混ぜ込むため、SiC/Si混合部材10の形態に関わらず、基材12中にフィラー14を散在させることができる。
上記第1の製造方法では、準備工程において、チップ状基材12aとフィラー14とを容器18の内部で混ぜ合わせる攪拌工程を有する旨記載した。しかしながら、基材12中にフィラー14を散在させることが可能であれば、攪拌工程は必ずしも必要なものでは無い。例えば、加熱工程では、溶融した基材12(液状Si)に対流が生じることとなる。この対流により、フィラー14を基材12中に散在することが可能であれば、攪拌工程を省くことができる。対流によるフィラー14の散在は、フィラー14をパウダー状とした場合に有効であると考えられる。
Claims (8)
- 多結晶構造のSi部材の内部に、チップ状、あるいはパウダー状のSiC部材を散在させたことを特徴とするSiCとSiによる混合部材。
- 表面にSiC層が形成されていることを特徴とする請求項1に記載のSiCとSiによる混合部材。
- チップ状あるいはパウダー状としたSi部材と、チップ状あるいはパウダー状としたSiC部材を用意する準備工程と、
前記Si部材と前記SiC部材による混合材料を前記Si部材の溶融温度まで昇温させる加熱工程と、
溶融した前記Si部材が前記SiC部材を包含した状態で再結晶化させる冷却工程と、を有することを特徴とするSiCとSiによる混合部材の製造方法。 - 前記準備工程で準備した前記Si部材および前記SiC部材のみを所定の容器に入れ、当該所定の容器内で前記Si部材と前記SiC部材とを固体のまま混ぜ合わせる攪拌工程をさらに有することを特徴とする請求項3に記載のSiCとSiによる混合部材の製造方法。
- 前記加熱工程では、前記Si部材の対流を利用して前記Si部材中に前記SiC部材を散在させることを特徴とする請求項3または4に記載のSiCとSiによる混合部材の製造方法。
- 前記冷却工程の後、表面にSiCコート層を形成する表面処理工程を有することを特徴とする請求項3~5のいずれか1項に記載のSiCとSiによる混合部材の製造方法。
- 前記加熱工程では、前記Si部材を溶融した際に加振させて脱気処理を行うことを特徴とする請求項3~6のいずれか1項に記載のSiCとSiによる混合部材の製造方法。
- 前記冷却工程では、混合部材の形態中において最も断面積が大きく、熱容量が大きくなる部位に基づいて設定した降温速度で再結晶化させることを特徴とする請求項3~7のいずれか1項に記載のSiCとSiによる混合部材の製造方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202080036143.1A CN113874338A (zh) | 2019-12-23 | 2020-12-17 | 基于SiC和Si的混合部件和制造方法 |
| US17/601,877 US12330992B2 (en) | 2019-12-23 | 2020-12-17 | Mixed member of SiC and Si and production method |
| KR1020217037232A KR102661148B1 (ko) | 2019-12-23 | 2020-12-17 | SiC와 Si에 의한 혼합 부재 및 제조 방법 |
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| JP2019-231317 | 2019-12-23 | ||
| JP2019231317A JP6798000B1 (ja) | 2019-12-23 | 2019-12-23 | SiCとSiによる混合部材の製造方法 |
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| WO2021132003A1 true WO2021132003A1 (ja) | 2021-07-01 |
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| PCT/JP2020/047111 Ceased WO2021132003A1 (ja) | 2019-12-23 | 2020-12-17 | SiCとSiによる混合部材および製造方法 |
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| US (1) | US12330992B2 (ja) |
| JP (1) | JP6798000B1 (ja) |
| KR (1) | KR102661148B1 (ja) |
| CN (1) | CN113874338A (ja) |
| TW (1) | TWI811602B (ja) |
| WO (1) | WO2021132003A1 (ja) |
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- 2019-12-23 JP JP2019231317A patent/JP6798000B1/ja active Active
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2020
- 2020-12-17 CN CN202080036143.1A patent/CN113874338A/zh active Pending
- 2020-12-17 US US17/601,877 patent/US12330992B2/en active Active
- 2020-12-17 KR KR1020217037232A patent/KR102661148B1/ko active Active
- 2020-12-17 WO PCT/JP2020/047111 patent/WO2021132003A1/ja not_active Ceased
- 2020-12-22 TW TW109145469A patent/TWI811602B/zh active
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| JPH08325033A (ja) * | 1995-05-30 | 1996-12-10 | Tokyo Denshi Yakin Kenkyusho:Kk | 赤外線用光学レンズ及び赤外線センサモジュール |
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| JP2015187076A (ja) * | 2006-08-14 | 2015-10-29 | 旭硝子株式会社 | 耐熱強化ガラス及び耐熱強化ガラスの製造方法 |
| JP2013245373A (ja) * | 2012-05-25 | 2013-12-09 | Sumitomo Electric Ind Ltd | 複合部材、複合部材の製造方法、及び半導体装置 |
| JP2018168047A (ja) * | 2017-03-30 | 2018-11-01 | 日本碍子株式会社 | 炭化珪素質焼結体の製造方法 |
| JP2019157204A (ja) * | 2018-03-13 | 2019-09-19 | イビデン株式会社 | SiC被覆ケイ素質材の製造方法、及び、SiC被覆ケイ素質材 |
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| Publication number | Publication date |
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| CN113874338A (zh) | 2021-12-31 |
| JP2021098630A (ja) | 2021-07-01 |
| US20220194860A1 (en) | 2022-06-23 |
| US12330992B2 (en) | 2025-06-17 |
| KR20210154192A (ko) | 2021-12-20 |
| JP6798000B1 (ja) | 2020-12-09 |
| KR102661148B1 (ko) | 2024-04-25 |
| TWI811602B (zh) | 2023-08-11 |
| TW202128597A (zh) | 2021-08-01 |
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