Spark plasma sintering of nanosized amorphous silicon nitride powder with a small amount of sintering additive

Mikinori Hotta, Takanori Shinoura, Naoya Enomoto, Junichi Hojo

    研究成果: ジャーナルへの寄稿学術誌査読

    22 被引用数 (Scopus)

    抄録

    Dense and fine-grained β-Si3N4 ceramics were successfully obtained with a small amount of sintering additives, 1.5 mass% Y2O3 and 0.5 mass% Al2O3, using nanosized amorphous Si3N4 powder by spark plasma sintering at temperatures of 1500°-1800°C and a pressure of 30 MPa under N 2. The β-Si3N4 ceramics were composed of equiaxed grains with an average size of 300 nm. A higher sintering temperature was required for the densification of submicrometer-sized α-Si 3N4 powder with the small amount of the additives. The use of nanosized amorphous Si3N4 powder accelerated the densification and the transformation to the β-phase.

    本文言語英語
    ページ(範囲)1544-1546
    ページ数3
    ジャーナルJournal of the American Ceramic Society
    93
    6
    DOI
    出版ステータス出版済み - 6月 1 2010

    !!!All Science Journal Classification (ASJC) codes

    • セラミックおよび複合材料
    • 材料化学

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