Development, mechanical and tribological characterization of Al2O3 reinforced ZrO2 ceramic composites

Abstract

Alumina reinforced zerconia composite materials are attractive structural fabrics, dental and industrial applications that incorporate high hardness and wear resistance, electrical resistance with additional toughness. In this research work Alumina is matrix material and zerconia is reinforced materials. Composites composite material containing different amount of zerconia added to the aluminum oxide i.e. 5%wt, 10%wt and 15%wt and prepared composite materials by using powder metallurgy milling method. The prepared was checked hardness, wear rate, Electrical resistance and Coefficient of linear thermal expansion. Composites are tested for wear intensity with a pin on the disk wear test machine, hardness for the Rockwell hardness tester, electrical resistance for the electrical resistance meter and coefficient of linear thermal linear thermal expansion is for the dilatometer, to analyze the crack propagation of the composite materials after wear by SEM and revealed a fairly uniform distribution of Ultra n-ZrO2 particles with a slight agglomeration. The incorporation of Ultra nano zirconium dioxide particles into aluminum particles lead to produce a aluminum composites with increased mechanical and electrical properties. Aluminum reinforced zirconia Ceramic composites work material are the good surface finish. The surface quality, the dimensional precision has a significant effect and the materials have a useful life.