A new type of Si3N4-BN composite ceramics (SNB ceramics) has been developed using an unique slipcasting method which utilizes homogeous mixing of ultra-fine constituent ceramics powders (Si3N4, BN), and gas pressure sintering. An important feature of the SNB ceramics in the present work is that their mechanical properties can be tailored by changing BN/Si3N4 ratio over a wide range. The SNB ceramics have excellent thermal shock resistance, and machinability while retaining relatively high strength. In this paper, microstructures and various mechanical properties of the SNB ceramics are described.
