HIGH PURITY DIAMOND POLYCRYSTALLINE BODY AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a dense and homogeneous polycrystalline body of a diamond single phase which has strength, hardness and heat resistance enough to be used as tools such as a cutting tool, a dresser, a die or a drilling bit.;SOLUTION: The high purity diamond polycrystalline body is a polycrystalline body substantially comprising only diamond formed by converting and sintering a non-diamond carbon material as a starting material into the diamond under ultrahigh pressure and high temperature without adding a sintering aid or a catalyst, wherein the content of hydrogen impurity is ≤200 ppm and the content of oxygen impurity is ≤50 ppm.;COPYRIGHT: (C)2009,JPO&INPIT