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Sintering behavior of aluminum nitride powder prepared by self-propagating high-temperature synthesis method

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Abstract

Fully dense aluminum nitride (AlN) ceramics were synthesized by self-propagating high-temperature synthesis (SHS) method using AlN powder as raw material with Y2O3 additive. The sintering behavior was studied at different sintering temperatures and additive contents. The change of phase compositions, secondary phase distributions and grain morphologies during sintering process were investigated. It is shown that fully dense ceramics using AlN powder prepared by SHS method can be obtained when the sintering temperature is above 1830 °C. Both Y2O3 content and sintering temperature have an important influence on the formation of Y–Al–O phase and grain shape. When Y2O3 content is identified, the grain morphology converts from polyhedron into sphere-like shape with the rise of sintering temperature. At a certain sintering temperature, the grain size decreases with the increase in Y2O3 content. The influencing mechanisms of different Y–Al–O secondary phases and sintering temperatures on the grain size and morphology were also discussed based on the experimental results.

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Acknowledgments

This study was financially supported by the International Cooperation Project of Zhejiang Province (No. 2012C24007).

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Authors and Affiliations

  1. Research Center of Magnetic and Electronic Materials, College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China

    Liang Qiao, Shu-Wen Chen, Li-Qiang Jiang & Sheng-Lei Che

  2. Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo, 152-8550, Japan

    Kazuo Shinozaki

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  1. Liang Qiao
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  2. Shu-Wen Chen
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  4. Kazuo Shinozaki
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  5. Sheng-Lei Che
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Correspondence to Sheng-Lei Che.

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Qiao, L., Chen, SW., Jiang, LQ. et al. Sintering behavior of aluminum nitride powder prepared by self-propagating high-temperature synthesis method. Rare Met. 37, 1091–1095 (2018). https://doi.org/10.1007/s12598-015-0582-6

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  • DOI: https://doi.org/10.1007/s12598-015-0582-6

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