JP4080053B2 - Method for producing composite - Google Patents
Method for producing composite Download PDFInfo
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- JP4080053B2 JP4080053B2 JP07293898A JP7293898A JP4080053B2 JP 4080053 B2 JP4080053 B2 JP 4080053B2 JP 07293898 A JP07293898 A JP 07293898A JP 7293898 A JP7293898 A JP 7293898A JP 4080053 B2 JP4080053 B2 JP 4080053B2
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- Prior art keywords
- metal
- composite
- silicon carbide
- inorganic material
- porous
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- 239000002131 composite material Substances 0.000 title claims description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- 239000000919 ceramic Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- 229910010272 inorganic material Inorganic materials 0.000 claims description 25
- 239000011147 inorganic material Substances 0.000 claims description 24
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 18
- 229910021426 porous silicon Inorganic materials 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000005242 forging Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000003672 processing method Methods 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、金属或いは合金とセラミックスとからなる複合体（以下、「金属−セラミックス複合体」又は単に「複合体」という）の製造方法に関する。
【０００２】
【従来の技術】
金属−セラミックス複合体は、金属、セラミックスの各々単独では得られない機械的熱的性質の向上を達成できる材料として期待されている。例えば、自動車のピストン部品の耐磨耗材料、ヒートシンクなどの放熱材料としての応用が挙げられる。
【０００３】
金属−セラミックス複合体は、セラミック粉、セラミック繊維を成形し、必要な場合にはさらにこれを焼成して作製した多孔質セラミックス構造体を用い、これを所望の型内の空間に配置し、この空間に溶融金属を流し込むことによって、前記多孔質セラミックス構造体に前記金属を含浸し、これを凝固させることにより作製する。溶融金属を含浸する方法としては、粉末冶金法に基づく方法、例えば、ダイキャスト法（特表平５−５０８３５０号公報）や溶湯鍛造法（まてりあ、第３６巻、第１号、１９９７、４０−４６ページ）等の圧力鋳造による方法、自発浸透による方法（特開平２−１９７３６８号公報）等の各種の方法が知られている。
【０００４】
【発明が解決しようとする課題】
これらの製造方法では、金属を含浸する際に、多孔質無機構造体が、それを支える治具、金型等を通じて熱を放散し、局部的な温度不均一を伴い、均質な複合体とならない、或いは溶融金属が金型に接することにより温度が低下し、部分的な流動性の低下が起こり、それに圧力が加わることにより、多孔質構造体が破損されること等の問題がある。
【０００５】
本発明者らは上記課題を解決するために鋭意検討を行なった結果、多孔質炭化珪素セラミックス焼結体からなる多孔質無機構造体にアルミナを主成分とする繊維状無機材料を隣接配置しながら金属を含浸することで、上記問題が無く、金属−セラミックス複合体が作製できることを見出し、本発明を完成するに至った。
【０００６】
【課題を解決するための手段】
即ち、本発明は、多孔質炭化珪素セラミックス焼結体からなる多孔質無機構造体にアルミナを主成分とする繊維状無機材料を隣接配置しながら金属を含浸することにより、多孔質炭化珪素セラミックス焼結体に金属が含浸されている第１相と、アルミナを主成分とする繊維状無機材料に金属が含浸されている第２相とが互いに隣接している構造を有する複合体を得ることを特徴とする複合体の製造方法であり、含浸方法が圧力鋳造法及び／又は溶湯鍛造法であることを特徴とする前記の複合体の製造方法である。
【０００７】
本発明は、金属がアルミニウムあるいはアルミニウム合金であることを特徴とする前記の複合体の製造方法であり、アルミナを主成分とする繊維質無機材料に金属が含浸されている第２相からなる層の厚みが１ｍｍ以上であることを特徴とする前記の複合体の製造方法であり、アルミナを主成分とする繊維状無機材料が多孔質炭化珪素セラミックス焼結体の周囲全面を覆う状態とするか、又は、多孔質炭化珪素セラミックス焼結体をアルミナを主成分とする繊維状無機材料２枚で挟む状態とすることを特徴とする前記の複合体の製造方法である。
【０００８】
【発明の実施の形態】
本発明は、多孔質炭化珪素セラミックス焼結体からなる多孔質無機構造体にアルミナを主成分とする繊維状無機材料を隣接配置しながら金属を含浸することを特徴とする複合体の製造方法である。前記構成を採用することで、金属を含浸する際に、多孔質構造体からの治具、金型等を通しての熱の放散が少なくなるため、該構造体の局部的な温度不均一がおさえられ、均質な複合体を得ることができる。また、溶融金属の金型等との接触による部分的温度低下も防ぐことができるため、溶融金属の部分的な固化にともなう流動性の低下が起こらず破損が少なくなる。
【０００９】
本発明の多孔質炭化珪素セラミックス焼結体からなる多孔質無機構造体としては、金属を含浸し得る気孔を有し、含浸操作等において変形、破壊等が生じがたい、例えば１０ＭＰａ程度の機械的強さを有する各種の多孔質炭化珪素セラミックス焼結体が挙げられる。また、本発明のアルミナを主成分とする繊維質無機材料とは、繊維状のアルミナを主成分とする無機化合物の集合体をいい、特に機械的な強さを必要とせず、ブランケット、マット等のいずれの状態であっても構わない。
【００１０】
更に、本発明の複合体の製造方法によれば、多孔質炭化珪素セラミックス焼結体からなる多孔質無機構造体に金属が含浸されている第１相と、アルミナを主成分とする繊維質無機材料に金属が含浸されている第２相とが互いに隣接している構造を有する複合体を得ることができる。第１相と第２相は互いに同一の金属により連続的につながっているので、互いに隣接する多孔質無機構造体と繊維質無機材料とが形成する界面で剥離等が起こるのを防止できる効果がある。
【００１１】
本発明において、アルミナを主成分とする繊維質無機材料は多孔質炭化珪素セラミックス焼結体からなる多孔質無機構造体に隣接して設置されていれば良いが、繊維質無機材料が多孔質無機構造体の周囲全面を覆う状態の場合には、得られる複合体の表面に切削加工性に富む前記第２相が存在することになり、好ましい。
【００１２】
更に、本発明によれば、多孔質無機構造体、繊維状無機材料と溶融金属を流し込む型内空間の大きさとを調整することで、例えば、一部がフィン状に突出した形状の第２相からなる層を有する複合体、第２相からなる層で埋まった穴を有する複合体、一部に肉厚の大きな第２相からなる層を有する複合体等を作製することができ、しかも前記第２相からなる層を従来公知の金属加工法を適用することでいろいろな形状の複合体を得ることができる。ここで、従来公知の金属加工法としては、前記の平面研削方法、穴あけ加工方法に例示される機械加工法に限定されるものでなく、金属の加工に適用できるあらゆる方法をいう。
【００１３】
従って、第２相からなる層の厚み、従って多孔質無機構造体に隣接配置する繊維状無機材料の厚みについては、選択される金属加工方法、加工後の複合体の寸法精度等により異なるが、少なくとも０．５μｍ以上であれば良い。金属加工法のうち安価で生産性の高い汎用の機械加工法を適用する場合には、前記第２相からなる層の厚みとしては５０μｍ以上が好ましく、１ｍｍ以上であることが一層好ましい。尚、その上限値に関しては、特に限定するべき理由がないが、２０ｍｍを越えるときには、例えば、半導体搭載用回路基板の放熱部品として用いるときに、高熱伝導、低熱膨張率であるという複合体の特徴を発揮することが出来ないおそれがある。また、第１相と第２相の熱膨張率の著しい違いにより、複合体の平面度の保持も難しくなる。
【００１４】
本発明の多孔質無機構造体は、上述したとおりに、金属或いは合金を含浸させることが可能な開放気孔を有し、しかも含浸操作において破壊することのない機械的強度を有する炭化珪素セラミックス焼結体であれば、どのようなものでも構わない。
【００１５】
本発明の繊維質無機材料としては、アルミナを主成分とする市販のものを用いることができる。アルミナを主成分とするものは、安価で入手し易い。
【００１６】
本発明に用いる金属については、本発明の目的を達成し得れば、どのようなものであっても構わないが、高熱伝導性、軽量性を達成する目的から、アルミニウム、マグネシウム等の軽合金又はそれらの合金が好ましい。前記合金についても格別の制限はなく、汎用のアルミニウム合金やマグネシウム合金を用いることができる。アルミニウム合金の場合には、鋳造のしやすさ、高熱伝導性の発現の点から、Ｓｉ含有量が４〜１０％のＡＣ２Ａ、ＡＣ２Ｂ、ＡＣ４Ａ、ＡＣ４Ｂ、ＡＣ４Ｃ、ＡＣ８Ｂ、ＡＣ４Ｄ、ＡＣ８Ｃ、ＡＤＣ１０、ＡＤＣ１２等の鋳造用アルミニウム合金や、１０００系、２０００系、３０００系、４０００系、５０００系、６０００系、７０００系の展伸用アルミニウム合金が特に好ましい。
【００１７】
上記の多孔質無機構造体と金属の組み合わせに関して、金属としてアルミニウムあるいはアルミニウム系合金、多孔質無機構造体として炭化珪素を用いたアルミニウム−炭化珪素複合体は、軽量、高熱伝導、セラミック基板との熱膨張の適合性の点で特に優れた組合せである。
【００１８】
本発明において、金属の含浸方法としては、従来公知のいろいろな含浸方法を適用することができるが、複合体表面に金属を多量に含む第２相を形成させる必要から、圧力鋳造による方法が望ましい。すなわち、ダイキャスト法による場合には、金型のキャビティをプリフォームよりも表面層の分だけ大きめに作り、キャビティのプリフォーム以外の空間に繊維状無機材料を配置して金属を含浸することにより、表面に第２相を持った複合体を容易に作製することができる。又、溶湯鍛造による場合には、多孔質無機構造体を繊維状無機材料で挟み、或いは包みながら金属を含浸させることにより、或いは、金型内面に繊維状無機材料を配置して金属を含浸させることにより容易に作製することができる。
【００１９】
以下、実施例及び比較例に基づき、本発明を更に詳細に説明する。
【００２０】
【実施例】
〔実施例〕
平均粒径５０μｍの炭化珪素に、バインダーとしてシリカゾルを固形分濃度で５重量％添加し、混合し、プレス成形した後、空気中９００℃で２時間焼成し、気孔率４０％で、大きさ１００ｍｍ×１００ｍｍ×３ｍｍの多孔質炭化珪素構造体を作製した。
【００２１】
前記の多孔質炭化珪素構造体１０個について、それぞれを厚さ１０ｍｍのアルミナ質のフェルト（電気化学工業（株）製、アルセンフェルト）２枚で挟み、内径２００ｍｍの金型内に納め、更に金型内に８００℃で溶融したＡｌ−１２重量％Ｓｉ−１重量％Ｍｇ合金を流し込み、押し棒にて１００ＭＰａの圧力で加圧し、複合体を作製した。冷却後、複合体を切り出し、破損状態を目視にて観察したが、何ら異常を認めなかった。
【００２２】
〔比較例〕
アルミナ質のフェルトを用いないこと以外は、実施例と同じ操作を行い、得られた１０個の複合体について、異常の有無を観察したところ、多孔質炭化珪素構造体が割れているものが１個、多孔質炭化珪素構造体にクラックが認められたものが４個であった。
【００２３】
【発明の効果】
本発明によれば、金属を含浸する際に、多孔質無機構造体が、それを支える治具、金型等を通じて熱を放散し、局部的な温度不均一を伴い、均質な複合体とならない、或いは溶融金属の部分的な流動性の低下によって多孔質無機構造体が破損されること等の不都合を解決し、安定して、生産性良く複合体を得ることができるという特徴を有しており、産業上有用である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a composite comprising a metal or alloy and ceramics (hereinafter referred to as “metal-ceramic composite” or simply “composite”).
[0002]
[Prior art]
Metal-ceramic composites are expected as materials that can achieve improvement in mechanical and thermal properties that cannot be obtained by each of metals and ceramics alone. For example, it can be applied as a heat-resistant material such as a wear-resistant material for automobile piston parts and a heat sink.
[0003]
The metal-ceramic composite is a porous ceramic structure formed by forming ceramic powder and ceramic fiber and, if necessary, further firing this, and placing it in a desired mold space. The molten metal is poured into the space to impregnate the porous ceramic structure with the metal and solidify it. As a method for impregnating the molten metal, a method based on a powder metallurgy method, for example, a die casting method (Japanese Patent Publication No. 5-508350) or a molten metal forging method (Materia, Vol. 36, No. 1, 1997, Various methods such as a method by pressure casting such as pages 40-46) and a method by spontaneous infiltration (Japanese Patent Laid-Open No. 2-197368) are known.
[0004]
[Problems to be solved by the invention]
In these manufacturing methods, when impregnated with metal, the porous inorganic structure dissipates heat through a jig, a mold, or the like that supports it, resulting in local temperature non-uniformity and not a homogeneous composite. Alternatively, when the molten metal comes into contact with the mold, the temperature is lowered, a partial drop in fluidity occurs, and there is a problem that the porous structure is damaged when pressure is applied thereto.
[0005]
As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention have placed a fibrous inorganic material mainly composed of alumina adjacent to a porous inorganic structure made of a porous silicon carbide ceramic sintered body. It has been found that by impregnating a metal, the above-mentioned problem is eliminated and a metal-ceramic composite can be produced, and the present invention has been completed.
[0006]
[Means for Solving the Problems]
That is, the present invention provides a porous silicon carbide ceramic sintered body by impregnating a porous inorganic structure composed of a porous silicon carbide ceramic sintered body with a metal while placing a fibrous inorganic material mainly composed of alumina adjacent thereto. Obtaining a composite having a structure in which a first phase in which a metal body is impregnated with a metal and a second phase in which a fibrous inorganic material mainly composed of alumina is impregnated with a metal are adjacent to each other; A method for producing a composite according to the present invention, wherein the impregnation method is a pressure casting method and / or a molten metal forging method.
[0007]
The present invention is a process for the preparation of the complex metals are characterized aluminum or aluminum alloy der Rukoto, and a second phase in which the metal is impregnated on the fibrous inorganic material mainly composed of alumina The method for producing a composite according to the above, wherein the layer has a thickness of 1 mm or more, and the fibrous inorganic material mainly composed of alumina covers the entire periphery of the porous silicon carbide ceramic sintered body. Alternatively, the porous silicon carbide ceramic sintered body is sandwiched between two fibrous inorganic materials mainly composed of alumina.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a method for producing a composite comprising impregnating a porous inorganic structure composed of a porous silicon carbide ceramic sintered body with a metal while placing a fibrous inorganic material mainly composed of alumina adjacent thereto. is there. By adopting the above-described configuration, when the metal is impregnated, heat dissipation from the porous structure through a jig, a die, etc. is reduced, so that local temperature nonuniformity of the structure is suppressed. is, it is possible to obtain a uniform quality complex. Moreover, since the partial temperature fall by contact with the metal mold | die etc. of a molten metal can also be prevented, the fluidity fall accompanying the partial solidification of a molten metal does not occur, but a failure | damage decreases.
[0009]
The porous inorganic structure comprising the porous silicon carbide ceramic sintered body of the present invention has pores that can be impregnated with metal, and is not easily deformed, broken, etc. during impregnation operations, for example, a mechanical pressure of about 10 MPa. each type of porous silicon carbide ceramic sintered bodies that have a strength and the like. In addition, the fibrous inorganic material mainly composed of alumina of the present invention refers to an aggregate of inorganic compounds mainly composed of fibrous alumina, and does not particularly require mechanical strength, such as a blanket and a mat. Any of these states may be used.
[0010]
Furthermore, according to the method for producing a composite of the present invention, a first phase in which a metal is impregnated in a porous inorganic structure composed of a porous silicon carbide ceramic sintered body , and a fibrous inorganic material mainly composed of alumina. A composite having a structure in which the second phase in which the material is impregnated with metal is adjacent to each other can be obtained. Since the first phase and the second phase are continuously connected to each other by the same metal, there is an effect that it is possible to prevent peeling and the like from occurring at the interface formed between the porous inorganic structure and the fibrous inorganic material adjacent to each other. is there.
[0011]
In the present invention, the fibrous inorganic material mainly composed of alumina may be disposed adjacent to the porous inorganic structure formed of the porous silicon carbide ceramic sintered body, but the fibrous inorganic material is porous inorganic material. In the case of covering the entire surface of the structure, the second phase having a high machinability exists on the surface of the resulting composite, which is preferable.
[0012]
Furthermore, according to the present invention, by adjusting the size of the space in the mold into which the porous inorganic structure, the fibrous inorganic material, and the molten metal are poured, for example, the second phase having a shape partially protruding in a fin shape. A composite having a layer composed of the second phase, a composite having a hole buried in the layer composed of the second phase, a composite having a layer composed of the second phase having a large thickness in part, and the like. By applying a conventionally known metal processing method to the layer composed of the second phase, composites having various shapes can be obtained. Here, as a conventionally well-known metal processing method, it is not limited to the machining method illustrated by the said surface grinding method and a drilling method, but means all the methods applicable to metal processing.
[0013]
Therefore, the thickness of the layer composed of the second phase, and thus the thickness of the fibrous inorganic material disposed adjacent to the porous inorganic structure, depends on the metal processing method selected, the dimensional accuracy of the composite after processing, etc. It may be at least 0.5 μm or more. In the case of applying a general-purpose machining method that is inexpensive and has high productivity among metal processing methods, the thickness of the layer made of the second phase is preferably 50 μm or more, and more preferably 1 mm or more. The upper limit is not particularly limited, but when it exceeds 20 mm, for example, when used as a heat dissipating part of a circuit board for mounting a semiconductor, the composite has a high thermal conductivity and a low coefficient of thermal expansion. May not be able to demonstrate. In addition, it is difficult to maintain the flatness of the composite due to a significant difference in thermal expansion coefficient between the first phase and the second phase.
[0014]
Porous inorganic structure of the present invention, as described above, has an open porosity that can be impregnated with the metals or alloys, moreover silicon carbide ceramic sintered with mechanical strength without destroying the impregnation Any body can be used.
[0015]
The fibrous inorganic material of the present invention, it is possible to use commercially available those based on alumina. As a main component A Rumi Nah, available at a low cost easy.
[0016]
The metal used in the present invention may be any metal as long as the object of the present invention can be achieved. For the purpose of achieving high thermal conductivity and light weight, a light alloy such as aluminum or magnesium is used. Or those alloys are preferable. There is no particular limitation on the alloy, and a general-purpose aluminum alloy or magnesium alloy can be used. In the case of an aluminum alloy, AC2A, AC2B, AC4A, AC4B, AC4C, AC8B, AC4D, AC8C, ADC10, ADC12 having a Si content of 4 to 10% from the viewpoint of easy casting and high thermal conductivity. Particularly preferred are aluminum alloys for casting such as 1000 series, 2000 series, 3000 series, 4000 series, 5000 series, 6000 series, and 7000 series.
[0017]
Regarding the combination of the above-mentioned porous inorganic structure and metal, the aluminum-silicon carbide composite using aluminum or an aluminum-based alloy as the metal and silicon carbide as the porous inorganic structure is light in weight, has high thermal conductivity, and heats from the ceramic substrate. This combination is particularly excellent in terms of expansion compatibility.
[0018]
In the present invention, various conventionally known impregnation methods can be applied as the metal impregnation method, but the method by pressure casting is desirable because it is necessary to form a second phase containing a large amount of metal on the composite surface. . That is, in the case of the die-cast method, the mold cavity is made larger than the preform by the surface layer, and the fibrous inorganic material is placed in a space other than the cavity preform to impregnate the metal. The composite having the second phase on the surface can be easily produced. In addition, in the case of molten metal forging, the porous inorganic structure is sandwiched between the fibrous inorganic materials or impregnated with the metal while being wrapped, or the fibrous inorganic material is disposed on the inner surface of the mold and impregnated with the metal. Can be easily manufactured.
[0019]
Hereinafter, based on an Example and a comparative example, this invention is demonstrated still in detail.
[0020]
【Example】
〔Example〕
Silica sol as a binder is added in an amount of 5% by weight as a binder to silicon carbide having an average particle size of 50 μm, mixed, press-molded, fired at 900 ° C. for 2 hours in air, with a porosity of 40% and a size of 100 mm. A porous silicon carbide structure of × 100 mm × 3 mm was produced.
[0021]
Each of the 10 porous silicon carbide structures is sandwiched between two 10 mm thick alumina felts (manufactured by Denki Kagaku Kogyo Co., Ltd., Arsen felt), placed in a 200 mm inner diameter mold, An Al-12 wt% Si-1 wt% Mg alloy melted at 800 ° C. was poured into the mold, and pressurized with a push rod at a pressure of 100 MPa to prepare a composite. After cooling, the composite was cut out and the damaged state was visually observed, but no abnormality was observed.
[0022]
[Comparative Example]
Except for not using an alumina felt, the same operation as in the example was performed, and the obtained 10 composites were observed for abnormalities. As a result, it was found that the porous silicon carbide structure was broken. The number of cracks in the porous silicon carbide structure was four.
[0023]
【The invention's effect】
According to the present invention, when impregnating a metal, the porous inorganic structure dissipates heat through a jig, a mold, or the like that supports the structure, and there is a local temperature non-uniformity so that a homogeneous composite is not formed. Or, it is possible to solve the inconvenience such as damage of the porous inorganic structure due to partial decrease in fluidity of the molten metal, and to obtain a composite with stable and high productivity. It is industrially useful.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07293898A JP4080053B2 (en) | 1998-03-23 | 1998-03-23 | Method for producing composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07293898A JP4080053B2 (en) | 1998-03-23 | 1998-03-23 | Method for producing composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11269578A JPH11269578A (en) | 1999-10-05 |
| JP4080053B2 true JP4080053B2 (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07293898A Expired - Lifetime JP4080053B2 (en) | 1998-03-23 | 1998-03-23 | Method for producing composite |
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| JP (1) | JP4080053B2 (en) |
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| JP4925498B2 (en) | 2000-07-12 | 2012-04-25 | 富士重工業株式会社 | Outside vehicle monitoring device with fail-safe function |
| JP4674999B2 (en) * | 2001-06-18 | 2011-04-20 | 電気化学工業株式会社 | Integrated ceramic circuit board manufacturing method |
| DE10164975B4 (en) * | 2001-05-11 | 2009-08-20 | Shw Casting Technologies Gmbh | Machining body with cast hard body |
| CN106715004B (en) * | 2014-07-24 | 2019-09-24 | 电化株式会社 | Composite and method of making the same |
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| JP2697851B2 (en) * | 1988-04-26 | 1998-01-14 | マツダ株式会社 | Method of manufacturing fiber reinforced metal member |
| JPH03198972A (en) * | 1989-12-26 | 1991-08-30 | Mitsubishi Heavy Ind Ltd | Manufacture of fiber reinforced metal |
| JPH03234355A (en) * | 1990-02-09 | 1991-10-18 | Honda Motor Co Ltd | Production of fiber reinforced composite member |
| JPH11277217A (en) * | 1998-01-19 | 1999-10-12 | Mitsubishi Materials Corp | Heat dissipation substrate and method of manufacturing the same |
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