Ultra-Precision Machining of Brittle Materials——A Review of Diamond-Cutting Brittle Materials

In ultra-precision machining of brittle materials, a very important phenomenon is the material transition from brittle to ductile mode. To successfully diamond-turn brittle materials to a mirror surface finish, it is critical to determine the transition point from between the two modes. This paper presents the experimental techniques to study this transition and discusses the mechanism of the surface generation. It has been recognized that the tool wear is a serious issue in diamond turning of brittle materials. Thus, it is suggested that the research in future should be concentrated on this field to enable the technology to be applied practically in production.