Coated Powders by CVD

Other potential applications are ceramic powders coated with their sintering aids, zirconia coated withyttria stabilizer, tungsten carbide coated with cobalt, or nickel, alumina abrasive powders coated with a relatively brittle second phase such as MgAl204 and plasma spray powders without the segregation of alloying elements. 

Some of the earliest applications of CVD were monolithic (or free-standing) structures. A tungsten tube made by CVD was reported as early as 1932.1 1 The applications of CVD in this area are now well established and many are in substantial commercial production. 

Carbon-Carbon. Carbon-carbon composites consist of a carbon fiber substrate, either in the form of woven fabric or random felt, and a carbon matrix. The matrix is produced by the pyrolysis of a polymer, 

Caibon-caibon has antigalling characteristic with the ability to slide against itself with very little wear, making it ideal for high-performance brakes. Such brakes are probably the maj or application of carbon-carbon and are found on most military aircraft, on the space shuttle. They are being introduced on civilian aircraft and racing cars. 

The space shuttle and other aerospace vehicles use carbon-carbon extensively in nose cap, leading edges, structural panels, and other components. 

---

Handbook of Chemical Vapor Deposition 3.4 Coated Powders by CVD... 

---