EVALUATION OF THERMAL RESISTANCE GRADE OF DIAMOND POWDERS HSD90
Experimental studies to determine the dynamic strength of diamond powder HSD 90 with different grits synthesized in China are performed. The study is conducted in the temperature range within 700…1000 <sup>o</sup>C. Graphitization and oxidation in different environments are studied by derivatography methods. The morphology of surface diamond grains after heating are examined by scanning electron microscopy.