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

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Abstract

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 °C, at 1300 °C, and at 1450 °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 °C and the other is in 1300-1450 °C, respectively. Thereafter, the phase equilibrium was reached in the temperature range of 1450-1700 °C. Effects of SiC on the phase formation processes in the ternary system were discussed.

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Acknowledgments

The present work was financially supported by the National Natural Science Foundation of China under Grant Nos. NSFC 51362001 and NSFC 51272053.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beifang University of Nationalities, Yinchuan, 750021, Ningxia, China

    Zhenbang Wei, Yong Jiang, Limeng Liu, Laner Wu & Zhenkun Huang

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  1. Zhenbang Wei
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  2. Yong Jiang
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  5. Zhenkun Huang
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Correspondence to Yong Jiang.

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Wei, Z., Jiang, Y., Liu, L. et al. Phase Formation of the Yttrium Aluminates in the Y2O3-Al2O3-SiC System. J. Phase Equilib. Diffus. 37, 149–154 (2016). https://doi.org/10.1007/s11669-015-0435-x

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  • DOI: https://doi.org/10.1007/s11669-015-0435-x

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