Influence of Sintering Conditions on Densification of YAG–ZrB2 Multi-phase Ceramics

ABSTRACT: Zirconium diboride (ZrB2) is difficult to prepare as high-density ceramics, which limits its application. To obtain high-density ZrB2 ceramics for improving its high-temperature properties, ZrB2 particles were coated with Al2O3–Y2O3 particles to prepare 20%YAG–ZrB2 ceramics with SPS. The optimum sintering condition is a temperature of 17008C, a pressure of 20MPa, and a holding time of 4min. The relative density of prepared 20%YAG–ZrB2 multi-phase ceramics is 97.2 % under optimization sintering technology, which indicate that high density YAG–ZrB2 multi-phase ceramics are successfully prepared. KEY WORDS: ZrB2, YAG, multi-phase ceramics, sintering, densification, microstructure