Ceramic Coating

Ceramic coated metals fundamentally form a composite system that combines the characteristics feature of metals and ceramics. Therefore, they are stable at both room and elevated temperatures; less susceptible to corrosive attack and they possess choicest chemical reactivity. Due to these properties ceramic coated products play a vital role in the making of rocket propulsion systems, gas turbines, aircrafts, etc. and articles of day to day living, such like kitchen wears, cans for food-stuffs; sanitary-vares, and craft work, jewellery, decorative articles, etc. In between these two extremes, ceramic coated metals play a functional role as corrosion resistant materials, thermal insulators, electrical insulators, grinding and cutting media, etc.

The materials commonly utilized for coating are refractory compounds, such like oxides, silicides, , berylides, aluminides,  platinum group metals, and cermet type materials. Of these aluminides and silicides occupy top positions because of their excellent performance. There are at present different methods employed to generate ceramic coatings but the choice of a specific technique for coating ceramics on base metal is mostly dependent on the characteristics of coating material and that of base metal. A technique useful for one system might not prove viable, economical or efficient for other system with different characteristics.