| 摘要 |
Sintered silicon nitride and a silicon nitride tool. The mean major axis length, the mean minor axis length, and the aspect ratio, represented by (mean major axis length/mean minor axis length) of constituent sintered silicon nitride grains in a silicon nitride tool are controlled, and the thermal conductivity and/or fracture toughness Kc thereof are enhanced, thereby providing a tool having a cutting edge which is not prone to chipping.
|
