Synthesis and properties of MoSi2 based engineering ceramics

Molybdenum disilicide is a high temperature structural ceramic with many attractive properties for engineering applications. Foremost amongst these is its stability in corrosive atmospheres up to about 1600C. However, there are a few undesirable properties that need to be addressed before it can become a viable material in high temperature applications. Since MoSi2 forms thermodynamically stable composites with both metals and ceramics, many reinforcing materials are incorporated into the matrix to improve the fracture toughness and creep properties. The low temperature oxidation can be controlled by making high density (> 95% of theoretical density) compacts. This article summarizes the important attempts that are made in improving the properties of molybdenum disilicide-based ceramics by the reinforcement with other materials.