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    • 10. 发明授权
    • Silicon nitride sintered body
    • 氮化硅烧结体
    • US5424256A
    • 1995-06-13
    • US138346
    • 1993-10-18
    • Masashi YoshimuraTakehisa YamamotoShinichi YamagataJin-Joo MatsuiAkira Yamakawa
    • Masashi YoshimuraTakehisa YamamotoShinichi YamagataJin-Joo MatsuiAkira Yamakawa
    • C04B35/593C04B35/599
    • C04B35/5935
    • Silicon nitride sintered bodies consisting of prismatic crystal grains of Si.sub.3 N.sub.4 and/or sialon, equi-axed crystal grains of Si.sub.3 N.sub.4 and/or sialon, a grain boundary phase existing among the prismatic and equi-axed crystal grains and dispersed particles in the grain boundary phase, in which the prismatic crystal grains have an average grain size of 0.3 .mu.m or less in minor axis and an average grain size of 5 .mu.m or less in major axis, the equi-axed crystal grains have an average grain size of 0.5 .mu.m or less and the dispersed particles have an average size of 0.1 .mu.m or less, the volume of the dispersed particles being 0.05% by volume or more based on the total volume of the rest of the sintered body. The silicon nitride sintered bodies have a strength sufficient for use as structural materials of machine parts or members, with a minimized scattering of the strength as well as high reliability, superior productivity and advantageous production cost.
    • 由Si 3 N 4和/或赛隆的棱柱状晶粒构成的氮化硅烧结体,Si 3 N 4等离子晶粒和/或赛隆,棱晶相和等轴晶粒中存在的晶界相和晶界相中的分散粒子 其中棱柱晶粒的短轴平均粒径为0.3μm以下,长轴的平均粒径为5μm以下,等轴晶粒的平均粒径为0.5μm m以下,分散粒子的平均粒径为0.1μm以下,相对于烧结体的其余部分的总体积,分散粒子的体积为0.05体积%以上。 氮化硅烧结体具有足以用作机械部件或部件的结构材料的强度,其强度的极小散射以及高可靠性,优异的生产率和有利的生产成本。