Fabrication of Yb α-SiAlON Ceramics by SPS with Crystal Seeds Prepared through Combustion Synthesis

Abstract

Abstract: Single-phase Yb α-SiAlON was prepared through combustion synthesis, then the as-synthesized powder was added as crystal seeds for fabrication of Yb α-SiAlON ceramics by SPS. The densification process, phase transformation, as well as microstructure development were studied, and effects of seed addition on the phase composition and microstructure of the sintered ceramics were also discussed. The experimental results show that the samples can be densified very quickly by SPS, and proper temperature and dwelling time are beneficial to phase transformation and grain growth. Seed addition accelerates the phase transformation as well as results in the formation of rod-like crystals, which is helpful to improve the toughness of ceramics.

Key words: Yb α-SiAlON, combustion synthesis, SPS, rod-like crystal

CLC Number:

TQ173

LIU Guang-Hua,CHEN Ke-Xin,ZHOU He-Ping,GUO Jun-Ming,NING Xiao-Shan. Fabrication of Yb α-SiAlON Ceramics by SPS with Crystal Seeds Prepared through Combustion Synthesis[J]. Journal of Inorganic Materials.

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Fabrication of Yb α-SiAlON Ceramics by SPS with Crystal Seeds Prepared through Combustion Synthesis

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