MULTILAYER STRUCTURED DIAMOND BASE SINTERED COMPACT, DIAMOND TOOL AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a multilayer structured diamond base sintered compact comprising a multilayer structure of a coarse particle layer and a fine particle layer and having excellent chipping resistance and high strength, a diamond tool and a method for manufacturing the same.

SOLUTION: The multilayer structured diamond base sintered compact and the diamond tool are formed by laminating and arranging a fine diamond powder layer between a coarse diamond powder layer and a binder component layer and sintering under ultrahigh pressure and a high temperature to form the multilayer structure comprising the coarse particle layer comprising coarse diamond particles and the fine particle layer comprising the fine diamond particles. In the diamond base sintered compact and the diamond tool, 0.1-15 vol.% carbonate-based binder component is infiltrated and filled.

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