Thermal Analysis of Detonation Nanodiamonds

Abstract

The thermal treatment of detonation nanodiamonds samples has been performed using synchronous thermal analysis in an argon flow at atmospheric pressure and 600, 800, 1000, 1200, and 1500°C with heating rates of 2 and 10°C/min. X-ray phase analysis of the stored samples shows the thermal stability of some nanodiamond particles up to 1500°C. An electron microscopic investigation of the heat-treated samples shows the effect of the heating rate on the properties of the detonation nanodiamonds powder. Phase changes in detonation nanodiamonds begin in the temperature range of 600–700°C, while the graphitization of diamond nanoparticles synthesized by detonation occurs at temperatures above 800°C.