Phase Formation of the Yttrium Aluminates in the Y2O3-Al2O3-SiC System

作者：Wei, Zhenbang; Jiang, Yong^*; Liu, Limeng; Wu, Laner; Huang, Zhenkun

来源：Journal of Phase Equilibria and Diffusion, 2016, 37(2): 149-154.

DOI：10.1007/s11669-015-0435-x

• phase transformation
• silicon carbide
• solid-state reaction
• yttrium aluminates

Phase formation sequence of the yttrium aluminates in the Y2O3-Al2O3-SiC ternary system as temperature increases were investigated via x-ray diffraction (XRD). Results showed that YAM (monoclinic), YAP (perovskite) and YAG (garnet) were the yttrium aluminates presented in the solid-state reacted samples at a fixed Al2O3:SiC ratio of 1:1. Formation of the yttrium aluminates depended on the temperature. The YAM, YAP and YAG started to form below 1150 A degrees C, at 1300 A degrees C, and at 1450 A degrees C, respectively. Accordingly, two behavior phase diagrams of the Y2O3-Al2O3-SiC ternary system were recognized, one is in the temperature range of 1150-1300 A degrees C and the other is in 1300-1450 A degrees C, respectively. Thereafter, the phase equilibrium was reached in the temperature range of 1450-1700 A degrees C. Effects of SiC on the phase formation processes in the ternary system were discussed.

• 出版日期2016-4
• 单位北方民族大学