Trends of Removal Machining Technology of Silicon Nitride Ceramics

Abstract

As advanced technology develops, high-functional ceramics are attracting attention as high-performance parts materials due to their excellent physical properties such as high strength, heat resistance, wear resistance, functional surface, and corrosion resistance. However, ceramics are brittle materials and are very difficult to machining, so there are many restrictions on making shapes by machining. Therefore, in order to meet the demand for high-functional ceramics, ultra-precision machining and high-efficiency machining technologies are required. Silicon nitride ceramics are highly regarded as functional precision parts, but the process of making parts with high reliability and precision is never easy due to their unique characteristics of ceramics, brittleness. This review focuses on the latest convergence research incorporating optimization technology as well as ceramic machining technology that induces ductile fracture and identification of the microstructure failure mechanism in relation to the trend of removal machining technology, focusing on silicon nitride ceramics. The development of ceramic removal machining technology is essential for all ceramic materials, not just silicon nitride ceramics, to be widely applicable as functional high-tech materials.