| 摘要 |
PURPOSE:To produce the title composite material capable of being sintered to high density and having excellent strength, hardness, fracture toughness, and sliding characteristic by specifying the interfacial spacing of the carbon part of the composite material by X-ray diffraction and the ratio of the ceramic to carbon. CONSTITUTION:The (002) interfacial spacing of the carbon part by X-ray diffraction is controlled to 3.35-3.45Angstrom in the ceramic-carbon based composite material, and the material consists of 50-96vol.% ceramic and 50-4vol.% carbon. When the ceramic content of the material is controlled to <50vol.%, the heat resistance, high strength, and high-hardness characteristic inherent in the ceramic are not fully revealed, and the sliding characteristic resulting from the contained carbon is not sufficiently improved at >96vol.% ceramic. Carbon powder or org. matter capable of being graphitized (<=3.45Angstrom interfacial spacing) under the sintering conditions of the ceramic is preferably used as the carbon. The mixture of the ceramic and carbon having such a composition is preformed, and then calcined in a nonoxidizing atmosphere to 10-120MPa pressure and at 800-2,500 deg.C to obtain the composite material. |
