Influence of Hot Pressing and Vacuum Sintering Parameters on Interfacial Reactions in Diamond-Metal Composites

摘要

The construction industry, especially the machining of natural stone and concrete, as well as the demolition of reinforced concrete structures, places high demands on the wear resistance of the used diamond-metal composite materials, which are attached to wire saws and drill bits. Material characteristics such as the hardness, porosity and the wear behavior of these diamond tools are mainly influenced by the bonding of the diamonds embedded in the metal matrix. In this case, carbide forming metals enforce a strong chemical bonding while catalytically active metals lead to a graphitization on the diamond surface, which weakens the bonding between the diamonds and the matrix. Previous research has revealed the effects of different metal matrix components on the embedded diamonds during the sintering process. Based on these results, this paper will focus on the parameter-dependencies such as the sintering time and temperature in hot-pressing as well as vacuum-sintering processes.