Pore-size control in porous SiC ceramics prepared by spark plasma sintering

Mikinori Hotta, Hideki Kita, Hiroyuki Matsuura, Naoya Enomoto, Junichi Hojo

    研究成果: ジャーナルへの寄稿学術誌査読

    13 被引用数 (Scopus)

    抄録

    Porous SiC ceramics were prepared at 19002000° C without holding time at 50200° C/min under a pressure of 15MPa in Ar with Al2O 3, Y2O3, and AlN additives by spark plasma sintering. The effects of heating rate, heating temperature, and sintering additive on the porosity, pore size, microstructure, and flexural strength of the porous SiC ceramics were investigated. As the heating rate increased, the size of SiC grains in the samples decreased, the porosity increased, and the flexural strength decreased. The strength of the samples increased with an increase in heating temperature. The growth of SiC grains was suppressed in the sample prepared at 1950°C, and the sample had both high porosity (42%) and high strength (95 MPa). In the samples prepared with AlNY2O 3 and AlNAl2O3 additives at 1950°C the porosities were 3239%. The addition of AlN to Y2O3 and Al2O3 additives resulted in the inhibition of grain growth and a decrease in the pore size of the samples. The maximum strength was 167MPa in the prepared porous SiC ceramics

    本文言語英語
    ページ(範囲)243-247
    ページ数5
    ジャーナルJournal of the Ceramic Society of Japan
    120
    1402
    DOI
    出版ステータス出版済み - 2012

    !!!All Science Journal Classification (ASJC) codes

    • セラミックおよび複合材料
    • 化学 (全般)
    • 凝縮系物理学
    • 材料化学

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