| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a sintered compact which is securely bonded with diamond particles to each other only by the silica carbide metathesized by the reaction of a minimum required amount of a binder, i.e., substantially metal silicate with diamond and is free of unsintered points and the residual points of the metal silicate by feeding the melt of silicon as a binder from a reaction vessel material enclosing diamond powder and penetrating the same among the diamond particles (an filtration sintering process). SOLUTION: This method of manufacturing the composite sintered compact of diamond/silicon carbide has steps of; (1) forming a powder mixture composed of silicon powder and silicon carbide powder of 10:90 to 90:10 by mass to a vessel body by pressure molding; (2) packing the diamond powder into this vessel body and sealing the vessel body airpermeably; (3) confining the vessel body into a glass capsule, subjecting the vessel body to deaeration and then vacuum sealing; and (4) then subjecting the vessel body to HIP sintering and at this time, forming the melt containing the silicon from the vessel body to penetrate the silicon among the diamond particles, thereby sintering the diamond particles. |
