Zirconia-alumina ceramics: A study of their properties

Abstract The current investigation shed light on examining the properties of ceramic based composites manufactured with various percentages of alumina and zirconia. Compressive strength, volumetric shrinkage, apparent porosity, and apparent density of the ceramic composites were the most significant outputs that impacts the composites quality. Therefore, this paper aims to evaluate the resulted composites according to these outputs' response. It was noted that the dominant peaks in the X-ray diffraction results is tetragonal zirconia in spite of using monoclinic zirconia during the composites manufacturing. The optimum compressive strength of 370 MPa was emerged with specimens after sintering produced with 70 wt.% zirconia and 30 wt.% alumina. Moreover, the zirconia-alumina composites findings revealed a remarkable improvement when compared with ceramics made from these materials individually.