The aqueous electrophoretic deposition (EPD) of diamond–diamond laminates

Abstract

The aqueous electrophoretic deposition (EPD) of a diamond/diamond laminate with two alternating grades of diamond was investigated. Diamond particles of average particle size 0.5μm and 2μm were deposited in an alternating manner onto tungsten carbide substrate. The layered diamond deposit was sintered with the carbide substrate in a high-pressure, high-temperature press. The sintered deposit was examined for evidence of alternating residual stresses. Differences of cobalt content in the 0.5 and 2μm layers were observed by image analysis. The sintered diamond laminate demonstrated only minimal crack deflection during three-point bending.