Effect of Surface Roughness of Sintered Diamond Anvil on the Efficiency of Pressure Generation

Abstract

High pressure generation tests were performed in order to clarify the effect of surface roughness on the efficiency of pressure generation in a multi-anvil apparatus. The efficiency of three kinds of sintered diamond (SD) anvil sets, which have differing surface roughness was compared. The following results were obtained. (1) The smaller the surface roughness of the SD anvil was, the better the efficiency of pressure generation was. (2) This effect was large at low pressures but was decreased at high pressures. The reason why these results were obtained is discussed.