Effect of YAG Content on the Properties of YAG-ZrB2 Ceramics

ZrB(2) belongs to a class of ceramics defined ultra-high-temperature ceramics (UHTCs) with extremely high melting temperatures, but ZrB(2) ceramics are difficult for densification. To make high relative density and good high-temperature property ZrB(2) ceramics, in this article, the effect of YAG content on the property of YAG-ZrB(2) multiphase ceramics is investigated. The sintering shrinkage is increasing with the increasing of the YAG content from 10% to 40%. The relative density increases with the increase of the YAG content from 10% to 40%, but the rate of increasing relative density from 10% to 30% is higher than that of 40%. When the content of YAG is higher than 30%, fracture toughness increases a little. The YAG content is more, and the weight gain is less, which shows that the oxidation layer thickness is thinner.