Synthesis and properties of MoSi2 based engineering ceramics

Molybdenum disilicide is a high temperature structural ceramic with many at tractive properties for engineering applications. Foremost amongst these is its stability in corrosive atmospheres up to about 1600 degreesC. 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, m any reinforcing materials are incorporated into the matrix to improve the f racture toughness and creep properties. The low temperature oxidation can b e: controlled by making high density (> 95% of theoretical density) compact s. This article summarizes the important attempts that are made in improvin g the properties of molybdenum disilicide-based ceramics by the reinforceme nt with other materials.