Al.sub.2 O.sub.3 composites, process for producing them and throw-away
tip made of Al.sub.2 O.sub.3 composites
    1.
    发明授权
    Al.sub.2 O.sub.3 composites, process for producing them and throw-away tip made of Al.sub.2 O.sub.3 composites 失效
    AL2 O3复合材料,生产AL2 O3复合材料及其制造方法

    公开(公告)号:US5123935A

    公开(公告)日:1992-06-23

    申请号:US582858

    申请日:1990-12-07

    摘要: In Al.sub.2 O.sub.3 composites used for machining tools for difficult-cutting steels, etc., strength and toughness are increased by dispersing a Ti compound with an average grain size of not greater than 0.1 .mu.m into Al.sub.2 O.sub.3 particles with the average grain size of not greater than 1 .mu.m, and SiC whiskers are uniformly dispersed between each of Al.sub.2 O.sub.3 particles to form a nanocomposite structure.For the above-mentioned purpose, SiC whiskers containing 0.3 to 1.5% by weight of oxygen, dissolved uniformly in a solvent, are mixed with a starting Al.sub.2 O.sub.3 series powder containing Ti compounds to form a uniform mixture, which is then molded and sintered.

    摘要翻译: PCT No.PCT / JP90 / 00213 Sec。 371 1990年12月7日第 102(e)1990年12月7日,PCT提交1990年2月22日PCT公布。 出版物WO90 / 09969 1990年9月7日。在用于难切削钢等加工工具的Al2O3复合材料中,通过将平均粒径不大于0.1μm的Ti化合物分散在Al 2 O 3粒子中,从而提高强度和韧性 平均粒径不大于1μm,SiC晶须均匀分散在Al2O3颗粒之间形成纳米复合结构。 为了上述目的,将含有0.3〜1.5重量%的氧均匀溶解在溶剂中的SiC晶须与含有Ti化合物的起始Al2O3系粉末混合,形成均匀的混合物,然后将其成型并烧结。