Читать книгу Metal Oxide Nanocomposites - Группа авторов - Страница 50

Cermets are particle strengthened composites comprises of ceramic grains of oxides, carbides or borides. The grains which constitute about 20 to 85% of the total volume are dispersed in a refractory ductile metal matrix. The ceramic and metal constituents are bonded together due to the presence of mutual solutions. Power metallurgy techniques are generally needed to produce cermet structures. Their potential properties are based on the relative volumes of the metal and ceramic constituents [2]. On impregnating the porous ceramic structure with a metallic matrix binder a cermet is obtained. Cermets are used as coating in a powder form where the powder is sprayed through a gas flame and fused to a base material. Although, a wide variety of cermets are available, yet only a few are used commercially.