Ceramic Composition Material for Operation under Extreme Conditions

摘要

A ceramic material based on a corundum matrix formed by submicrocrystalline particles of aluminum oxide and filled with microsized particles of lanthanum hexaaluminate is obtained. The matrix is reinforced additionally by aluminum oxide nanofibers, and the fiber surface is modified by zirconium dioxide nanoparticles. All the components of the ceramic composite are synthesized by the sol-gel method. The composite has high strength and thermal properties. The coefficient of friction and abradability of the composite material make it possible to recommend its application for operation under dry friction conditions at high temperatures and in frictional units of fine mechanical instruments.