Toughening and strengthening of translucent alumina

抄録

Translucent alumina with anisotropic-grained microstructure was fabricated utilizing a small amount of glass-forming impurities and the hot isostatic pressing (HIP) method. Its total forward transmission at 600 nm is 72% (1 mm thickness), and bending strength and fracture toughness are estimated to be 649 MPa and 9.4 MPa·m^0.5, respectively. Bimodal structure composed of elongated anisotropic-grain and fine equi-axis grain is responsible for the enhancement of mechanical properties.