More than a decade has passed since polycrystalline diamond (PCD), a superhard material, was introduced. Some of its structure-related mechanical properties such as wear resistance, exceed the values of natural diamond. It can be used for cutting tools or wire drawing dies. The PCD blanks are likely to be heated during production of the tool and when the tool is working. The aim of this study was to investigate the variation in structure of PCD due to heat treatment at 500-900 degree C. Graphitisation was the main effect of annealing. The results show that the degradation of polycrystalline diamond is a complex process which depends, among other things, on the composition of the material. Cobalt promotes degradation.
|Number of pages||4|
|Publication status||Published - Dec 1 1986|
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