摘要:
The high-strength and high-toughness sinter of the present invention comprises a crystal agglomerate maintaining a fibrous shape and composed of crystals of SiC and MC.sub.1-x wherein M is Ti and/or Zr and X is a number of 0 or more but less than 1. This sinter is produced by laminating an inorganic fiber comprising a particular inorganic material containing titanium and/or zirconium molding the laminate into a predetermined shape, and conducting heat-sintering simultaneously with the molding or after the molding in an atmosphere comprising at least one member selected from the group consisting of a vacuum, an inert gas, a reducing gas, and a hydrucoarbon gas at a temperature of 1,700.degree. to 2,200.degree. C.
摘要:
The high-strength and high-toughness sinter of the present invention includes a crystal agglomerate maintaining a fibrous shape and composed of crystals of SiC and MC.sub.1-x wherein M is Ti and/or Zr and x is a number of 0 or more but less than 1. This sinter is produced by laminating an inorganic fiber of a particular inorganic material containing titanium and/or zirconium molding the laminate into a predetermined shape, and conducting heat-sintering simultaneously with the molding or after the molding in an atmosphere of a vacuum, an inert gas, a reducing gas, or a hydrocarbon gas at a temperature of 1,700 to 2,200.degree. C.
摘要:
An inorganic fiber having excellent properties as a reinforcement for metals, plastics and rubbers, which has a surface layer portion and an inner layer portion, the surface layer portion having a composition continuously changing from the inner layer portion to the fiber surface, and which is composed of a basic constituent unit of;(1) an amorphous substance composed of silicon, carbon, either titanium or zirconium, and oxygen,(2) an aggregate composed of;crystalline fine particles formed of at least one selected from the group consisting of .beta.-SiC, MC, a solid solution of .beta.-SiC and MC, and MC.sub.1-x, and having a particle diameter of not more than 50 nm,amorphous SiO.sub.2, andMO.sub.2, or(3) a mixture of the above amorphous substance (1) with the above aggregate (2),wherein M is titanium or zirconium and x is greater than 0 and less than 1,the inorganic fiber having an inner layer portion comprising 40 to 60% by weight of silicon, 20 to 40% by weight of carbon, 0.5 to 10% by weight of titanium or zirconium and 10 to 30% by weight of oxygen, and a surface layer portion comprising 0 to 40% by weight of silicon, 50 to 100% by weight of carbon, 0 to 8% by weight of titanium or zirconium and 0 to 25% by weight of oxygen.
摘要:
Silicon-containing carbide fibers having high strength and modulus of elasticity, and polymer compositions for production thereof. These fibrers are inexpensive and very useful as reinforcing fibers for composite materials comprising plastics, carbon, metals, etc. as a matrix. These polymer compositions are also useful as a matrix of the above composite materials.
摘要:
This invention provides an electromagnetic wave absorbing material composed of a composite material comprising a fiber having a specific resistance of 10.sup.-2 to 10.sup.2 .OMEGA..cm and a matrix, wherein the fiber is composed of an inorganic substance selected from the group consisting ofi) an amorphous substance substantially composed of Si, M, C and O,ii) crystalline ultrafine particles substantially composed of .beta.-SiC, C, MC, a solid solution of .sym.-SiC and MC and/or MC.sub.1-x, and having a particle diameter of not more than 500 .ANG., or optionally, an aggregate of the crystalline ultrafine particles, amorphous SiO.sub.2 and amorphous MO.sub.2, andiii) a mixture of the above i) amorphous substance with the above ii) crystalline ultrafine particles or aggregate in which M denotes Ti or Zr, and X is more than 0 but less than 1.
摘要:
A reinforcing inorganic fiber composed of an internal layer and a surface layer, whereinsaid internal layer is composed of an inorganic material containing silicon, either titanium or zirconium, carbon and oxygen which is(i) an amorphous material consisting substantially of Si, M, C and O, or(ii) an aggregate consisting substantially of ultrafine crystalline particles with a particle diameter of not more than 500 .ANG. of .beta.-SiC, MC, a solid solution of .beta.-SiC and MC and MC.sub.1-x, wherein M represents titanium or zirconium, and x is a number represented by 0
摘要:
An inorganic fibrous material for reinforcing composite materials, said fibrous material composed of a central layer and a surface layer, whereinthe surface layer is formed of an inorganic material composed of(i) an amorphous material consisting substantially of Si, M, C and O, wherein M is Ti or Zr, or(ii) an aggregate consisting substantially of ultrafine crystalline particles of beta-SiC, MC, a solid solution of beta-SiC and MC, and MC.sub.1-x having a particle diameter of not more than 500 .ANG. wherein M is as defined above and x is a number represented by 0
摘要:
A fiber and fibrous material for producing composite materials, fiber-reinforced metals, fiber-reinforced plastics and fiber-reinforced ceramics, in which short fibers, whiskers or powders made of heat resistant material are deposited on continuous fibers made of heat resistant material.The composite materials, such as fiber-reinforced metals, plastics, and ceramics, contain the fibrous material in a matrix, and have improved control of the fiber volume ratio and mechanical characteristics. Processes for producing the fiber, fibrous materials and composite materials are also disclosed.
摘要:
A reinforcement for composite materials is disclosed, which comprises a number of filaments of inorganic long fiber and glass and/or glass ceramic present in the gaps among the filaments and having a wire or tape form. Also disclosed is a metallic or ceramic composite material composed of a plurality of the reinforcements and a metal or intermetallic compound or ceramic which is present in the gaps among the individual reinforcements.
摘要:
A reinforcement for composite materials is disclosed, which comprises a number of filaments of inorganic long fiber and glass and/or glass ceramic present in the gaps among the filaments and having a wire or tape form. Also disclosed is a metallic or ceramic composite material composed of a plurality of the reinforcements and a metal or intermetallic compound or ceramic which is present in the gaps among the individual reinforcements.