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1. 发明专利

JP2002179462A NEW COMPOSITE MATERIAL AND METHOD FOR MANUFACTURING COMPOSITE MATERIAL 失效
公开(公告)号：JP2002179462A
公开(公告)日：2002-06-26
申请号：JP2000374972
申请日：2000-12-08
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , HASHIMOTO NAOKI
IPC分类号： C04B35/52 , C04B35/573 , C04B35/83 , C04B41/50 , C04B41/85 , C04B41/87 , C04B41/88 , F16D69/02
摘要： PROBLEM TO BE SOLVED: To provide a composite material excellent in wear resistance, oxidation resistance or the like which can be manufactured by an easy method by using a C/C composite as the base material. SOLUTION: The composite material is manufactured by disposing a composite material member in a desired or specified form excellent in wear resistance and oxidation resistance which is made of at least silicon carbide, and if necessary, may contain metal silicon, and which has a plurality of projections on the surface of the C/C composite as composite carbon fibers or on the surface of a formed body prepared by forming the C/C composite into a desired form according to its usage. Or the composite material has a substantially flattened surface where at least the composite material member is formed by grounding and processing the projections of the composite material member to an almost same level as the sea surface in a seal-island structure.

2. 发明专利

JP2001328887A METAL SILICIDE-IMPREGNATED COMPOSITE AND METHOD FOR PRODUCING THE SAME 失效
公开(公告)号：JP2001328887A
公开(公告)日：2001-11-27
申请号：JP2000148152
申请日：2000-05-19
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , HASHIMOTO NAOKI
IPC分类号： B22D19/14 , C04B35/83 , C04B41/50 , C04B41/87 , C04B41/88 , C22C47/14 , C22C49/00 , C22C49/14
摘要： PROBLEM TO BE SOLVED: To obtain the composite having well-balanced characteristics of lightweightness and oxidation resistance while keeping the mechanical strength at a original level, and to provide a method for producing such a composite material. SOLUTION: This composite material is obtained by impregnating a specific metal silicide into a C/C composite or carbonaceous composite material derived from the C/C composite as starting material.

3. 发明专利

JP2001038632A GRINDING WHEEL 失效
公开(公告)号：JP2001038632A
公开(公告)日：2001-02-13
申请号：JP21947899
申请日：1999-08-03
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , NAKANO KENJI
IPC分类号： B24D3/00
摘要： PROBLEM TO BE SOLVED: To prevent reduction in work accuracy by providing base metal composed of a composite material mainly composed of at least one material selected from carbon powder, carbon silicon and metallic silicon and carbon fiber. SOLUTION: In a grinding wheel 11, a composite material mainly composed of at least one material selected from carbon powder, carbon silicon(SiC) and metallic silicon (metallic Si) and carbon fiber is used as base metal 12. An abrasive grain layer 13 is formed on the outer periphery. Here, either of a carbon fiber/carbon powder/SiC/metallic Si composite material, a carbon fiber/ SiC/metallic Si composite material, a carbon fiber/carbon powder/SiC composite material, a carbon fiber/carbon powder composite material and a carbon fiber/ SiC composite material is suitably used as a material of the base metal 12, thereby obtains an excellent effect such as being easy in handling, reducing abrasion of a spindle and being excellent in durability.

4. 发明专利

JP2000351672A SIC-C/C COMPOSITE MATERIAL, ITS USE, AND PRODUCTION THEREOF 失效
公开(公告)号：JP2000351672A
公开(公告)日：2000-12-19
申请号：JP2000005168
申请日：2000-01-14
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , NAKANO KENJI
IPC分类号： C04B35/565 , C04B35/573 , C04B35/80 , C04B41/50 , C04B41/87 , C23C2/00 , F16C33/16 , F16C33/24 , F16C33/62 , F16D65/02 , F16D69/02
摘要： PROBLEM TO BE SOLVED: To provide a SiC-C/C composite material which has a proper coefficient of dynamic friction, abrasion resistance, corrosion resistance in a strong oxidation corrosion environment, creep resistance and spalling resistance. SOLUTION: This SiC-C/C composite material can be produced from a process for heating a C/C composite and metal silicon in the flow of an inert gas under a reduced pressure at a high temperature to grow silicon carbide and simultaneously sufficiently charge the metal silicon into the residual pores, and a process for lowering the inner temperature of the oven or raising the inner pressure of the oven to about 1 atm and further raising the inner temperature of the oven without lowering the inner temperature, thereby diffusing the produced silicon carbide or the metal silicon used for charging the pores from the matrix to the inner portions of the C/C composite material comprising the carbon fibers and the carbon component except the carbon fibers to react the silicon with the carbon. At least a portion brought into contact with a melted metal is formed from the SiC-C/C composite material.

5. 发明专利

JP2000289032A MOLD FOR MOLDING AND MOUTH 失效
公开(公告)号：JP2000289032A
公开(公告)日：2000-10-17
申请号：JP10188099
申请日：1999-04-08
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , NAKANO KENJI
IPC分类号： B29C33/38 , B29C48/30 , B29C51/30 , C04B35/565 , B29C47/12
摘要： PROBLEM TO BE SOLVED: To perform excellent lubricity and wear resistance at a high temperature by forming an Si-SiC composite material or an SiC composite material. SOLUTION: The mold is formed of an Si-SiC composite material or an SiC composite material 1. Here, as the Si-SiC composite material, a material having a matrix in which a content ratio of a silicon is raised as separated from a surface of a yarn is used. A base skeleton made of a C/C composite material forms a yarn assembly 6 obtained by laminating a plurality of yarn arrays 1A, 1B, 1C, 1D, 1E, and 1F formed of carbon fibers in a specific direction. The respective arrays 1A, 1B, 1C, 1D, 1E and 1F are obtained by yarns constituted by bundling specific number of carbon fibers and arraying the yarns substantially parallel to each other in a two-dimensional manner. A skeleton of the SiC composite material is fundamentally similar to that of the Si-SiC material. Thus, excellent dimensional accuracy and mold releasability can be obtain at a high temperature.

6. 发明专利

JP2000247758A HEAT CONDUCTOR 失效
公开(公告)号：JP2000247758A
公开(公告)日：2000-09-12
申请号：JP4905099
申请日：1999-02-25
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , NAKANO KENJI
IPC分类号： C04B35/84 , C22C47/00 , C22C49/00 , C22C49/02 , C22C49/06 , F28F21/02
摘要： PROBLEM TO BE SOLVED: To provide a heat conductor which has a relatively low thermal expansion coefficient and excellent heat conductivity by mixing carbon fibers with a metal selected from copper, aluminum, silver and gold to give a heat conductivity of a specific value or larger. SOLUTION: This heat conductor comprises carbon fibers, preferably pitch- based carbon fibers to whose surfaces free carbon is substantially not adhered, and one or more metals selected from copper, aluminum, silver and gold, and has a heat conductivity of >=300 W/mK. Carbon fibers whose surfaces are plated with nickel are preferable, because the wettability of the metal on the surfaces of the carbon fibers is improved. It is preferable that the direction of the heat conduction is approximately coincident with the longitudinal direction of the carbon fibers. The lamination density of the carbon fibers is preferably controlled to give a thermal expansion coefficient of 4×10-6 to 8×10-6. The heat conductor may be produced by laminating carbon fibers 4 in a constant direction in a vessel having a compressing means, compressing the laminated carbon fibers, immersing the carbon fibers together with the vessel in a melted metal, and then pressing the immersed carbon fibers from the outside to impregnate the metal into spaces among the carbon fibers.

7. 发明专利

JP2000234867A CRUCIBLE FOR HEATING FURNACE 失效
公开(公告)号：JP2000234867A
公开(公告)日：2000-08-29
申请号：JP3645299
申请日：1999-02-15
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU
IPC分类号： C04B41/85 , F27B14/10 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To enhance durability of a crucible suitable for melting a metal while facilitating handling of processed product by forming the crucible of a composite material principally comprising carbon and silicon obtain by subjecting a preliminary molding to impregnation processing with metal silicon and having a specified porosity. SOLUTION: A crucible for heating furnace is formed of a composite material principally comprising carbon and silicon obtain by subjecting a preliminary molding to impregnation processing with metal silicon and having porosity of lower than 10%. A microstructure fibrous composite material 7 having a matrix of Si-SiC based material between adjacent yarns in a bulk material of yarn principally comprising carbon fibers is employed as the preliminary molding. More specifically, frame of the fibrous composite material 7 is composed of the bulk material of yarn 6 comprising yarn arrays 1A-1F laminated in the vertical direction while intersecting the adjacent arrays orthogonally wherein each array 1A-1F is formed by arranging yarns 2A, 2B two- dimensionally.

8. 发明专利

JP2000095586A COMPOSITE MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JP2000095586A
公开(公告)日：2000-04-04
申请号：JP26513198
申请日：1998-09-18
申请人： NGK INSULATORS LTD
发明人： HANZAWA SHIGERU , ISHIKAWA SHUHEI
IPC分类号： H01L23/15 , C04B41/51 , C04B41/88
摘要： PROBLEM TO BE SOLVED: To obtain a characteristic which is in conformity with the balance between thermal expansion coefficient and heat conductivity, which balance is required by practical electronic parts(including semiconductor device) or the like. SOLUTION: A yarn assembly 208 is fabricated by two-dimensionally arranging plural yarns 2A, 2B in nearly parallel to form yarn arranged bodies 1A-1F and then alternately laminating plural yarn arranged bodies 1A-1F. The yarns 2A, 2B are each composed of carbon fiber bundles obtained by bundling carbon fibers, e.g. hundreds-tens of thousands of fibers having diameters of about 10 μm and a carbon component except the carbon fiber. The composite material is produced by impregnating metal matrices containing at least copper 206A, 206B into tube-like open pores formed in the yarn assembly 208.

9. 发明专利

JPH11322473A HEAT RADIATION MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH11322473A
公开(公告)日：1999-11-24
申请号：JP4209999
申请日：1999-02-19
申请人： NGK INSULATORS LTD , ACROSS KK
发明人： HANZAWA SHIGERU , KOMIYAMA TSUNEO , NAKAGAWA TAKAO , YAMASHITA MIHOKO
IPC分类号： C04B41/85 , C04B35/80 , C04B35/83 , C04B35/84 , C04B41/50
摘要： PROBLEM TO BE SOLVED: To provide a heat radiation material which is low in thermal expansion, causes a less peeling from a mating material and is excellent in the corrosion resistance, creep resistance and spalling resistance in a highly corrosive environment, and a process for producing the same. SOLUTION: This heat radiation material is formed by using a fiber composite material 7 having a matrix consisting of yarn assemblies 6 which are three- dimensionally combined and integrated with yarns 2A, 2B including bundles 3 of carbon fibers and carbon components exclusive of the carbon fibers and Si-SiC-base materials 4A, 4B, 5A, 5B packed between the yarns 2A, 2B adjacent to each other in the yarn assemblies 6. The process for production consists in including the powdery carbon components which constitute the matrix in the final into the bundles 3 of the carbon fibers to manufacture the carbon fiber bundles 3, then forming plastic films on the circumferences of the carbon fiber bundles 3 to form intermediate materials, forming the intermediate materials to a yarn form, laminating a prescribed amt. of the yarn, molding and sintering the yarn to obtain sintered compacts, holding the sintered compacts at 1100 to 1400 deg.C under an inert gaseous atmosphere, then heating up the sintered compacts to 1450 to 2500 deg.C and impregnating the sintered compacts with the Si-SiC-base materials.

10. 发明专利

JPH1135376A SILICON-SILICON CARBIDE MATERIAL WITH SILICON CONCENTRATION GRADIENT AND SILICON CARBIDE FIBER REINFORCED SILICON-SILICON CARBIDE COMPOSITE MATERIAL WITH SILICON CONCENTRATION GRADIENT AND THEIR PRODUCTION 失效
公开(公告)号：JPH1135376A
公开(公告)日：1999-02-09
申请号：JP19413297
申请日：1997-07-18
申请人： NGK INSULATORS LTD , JAPAN ATOMIC ENERGY RES INST
发明人： HANZAWA SHIGERU , FUTAGAWA MASATOSHI , SHIMIZU SABURO , KONUKI KAORU , IOKA IKUO , INTE JOHANN STOCKMANN
IPC分类号： C04B35/565 , C04B35/573 , C04B35/80
摘要： PROBLEM TO BE SOLVED: To produce an Si-SiC material with an Si concn. gradient capable of remarkably improving corrosion resistance and strength in a highly oxidation- corrosive environment and healing function to defects in the surface and central layers and to produce an SiC fiber reinforced Si-SiC composite material with an Si concn. gradient. SOLUTION: Silicon is melted and impregnated into a compact contg. SiC particles to obtain the objective Si-SiC material having

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