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    SiAlON composites and method of preparing the same
    1.
    发明授权
    SiAlON composites and method of preparing the same 失效
    SiAlON复合材料及其制备方法

    公开(公告)号：US5413972A

    公开(公告)日：1995-05-09

    申请号：US178377

    申请日：1993-12-23

    申请人： Chinmau J. Hwang ,  Donald R. Beaman ,  David W. Susnitzky

    发明人： Chinmau J. Hwang ,  Donald R. Beaman ,  David W. Susnitzky

    IPC分类号： C04B35/599 ,  C04B35/597 ,  C04B35/58

    CPC分类号： C04B35/597

    摘要： A dense, substantially glass free, SiAlON ceramic material and method of making such material. The material has at least an alpha-SiAlON phase and a beta-SiAlON phase and exhibits excellent high temperature oxidation resistance and strength, good room temperature toughness and hardness, and a density greater than at least 95 percent of theoretical. The method of making the ceramic material is simple and includes adding AlN in an amount sufficient to allow formation of a desired amount of alpha-SiAlON, and in addition, convert SiO.sub.2 and Al.sub.2 O.sub.3 into the beta-SiAlON phase, preferably, by adding AlN in an amount between about 1.3X+0.08Y-0.0045XY and about 1.3X+0.2Y-0.0024XY, wherein X is a weight percent of the SiO.sub.2 based on total weight of the Si.sub.3 N.sub.4 in the mixture and Y is a weight percent of alpha-SiAlON phase desired.

    摘要翻译： 密实的，基本上无玻璃的SiAlON陶瓷材料和制造这种材料的方法。 该材料至少具有α-SiAlON相和β-SiAlON相，并且具有优异的高温抗氧化性和强度，良好的室温韧性和硬度，并且密度大于理论值的至少95％。 制造陶瓷材料的方法是简单的，并且包括以足以形成所需量的α-SiAlON的量加入AlN，此外，将SiO 2和Al 2 O 3转化成β-SiAlON相，优选通过将AlN加入到 在约1.3X + 0.08Y-0.0045XY和约1.3X + 0.2Y-0.0024XY之间的量，其中X是基于混合物中Si 3 N 4的总重量的SiO 2的重量百分比，Y是α -SiAlON相需要。