| 摘要 |
A sintered body of silicon nitride for use as a sliding member is produced by sintering a mixture of a silicon-nitride-based powder and a sintering additive, and contains a metallic compound having a contact angle of silicon nitride of a matrix and finely separated out on at least a surface of the sintered body of silicon nitride. The sintered body of silicon nitride exhibits excellent sliding characteristics in fluid-lubricated environments. The silicon-nitride-based powder preferably comprises a powder of silicon nitride and at least one metal element selected from the group consisting of molybdenum, nickel, cobalt, chromium, manganese, tungsten, and tantalum, and/or a nitride or a sulfide of such at least one metal element. |
