At present, there is no uniform standard for the wear ratio test of CVD diamond, but the industry standard of PCD is usually followed, and the test method is inconsistent with the actual use conditions. As a result, the wear ratio of CVD diamond is lower than that of PCD, which is completely inconsistent with the reality.

The wear of diamond in use is mainly due to the graphitization of the surface caused by the high temperature generated during processing, so the thermal conductivity and fracture strength can better characterize the wear resistance of the product.

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