Preparation and Mechanical Properties of Alumina/YAG Composite by Hot-Press

Abstract

First, fine alumina powder was compacted and calcined at 1000°C for 1h. Then, YAG solution was impregnated into the calcined compact. After that, these compacts were dried. This process was repeated several times. Finally, they were hot-pressed between 1400 and 1500°C in Ar flow for 1h under a pressure of 30MPa. Concentration of YAG after 5 times impregnation and then hot-pressed at 1400°C was about 10vol.%. The bending strength was about 680MPa.