| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a silicon nitride ceramic having both low friction and low wear properties and its manufacturing method, etc. <P>SOLUTION: This composite material is a silicon nitride/carbon fiber composite material which is prepared by compounding as a row material a carbon fiber having a tensile elastic modulus of higher than 550 GPa and a graphite bonding content of higher than 85%, blending, pulverizing, and dispersing it to a silicon nitride, then sintering, its manufacturing method and sliding members comprising the composite material are also disclosed. This silicon nitride/carbon fiber composite material can keep the friction coefficient under no lubrication not higher than 0.25, and the wear caused by brittle fracture is suppressed by the drown-out effect of the dispersed carbon fiber which enhances the value of fracture toughness of the material itself, and its manufacturing method and sliding members therefrom can be provided. The low friction can be exerted even in water and sliding members such as underwater mechanical seal, etc. can be prepared. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
