Method of manufacture metal diboride ceramics
    1.
    发明授权
    Method of manufacture metal diboride ceramics 失效
    金属二硼化物陶瓷的制造方法

    公开(公告)号:US4929417A

    公开(公告)日:1990-05-29

    申请号:US341461

    申请日:1989-04-21

    IPC分类号: C04B35/58

    摘要: A powder of at least one of TiB.sub.2, ZrB.sub.2 and HfB.sub.2 is mixed with at least one of Ti, Zr, Hf, TiB, ZrB and HfB, or with at least one of Ti, Zr, Hf, TiB, ZrB and HfB and a powder of boron, to prepare a mixed powder which can form a sintered product having a boron content of 65 to 67 atom %. Alternatively, a powder of at least one of Ti, Zr, Hf, TiB, ZrB and HfB is mixed with a powder of boron to prepare the mixed powder. The mixed powder may further contain up to a maximum of 30% by weight of a powder of AlN. Then, the mixed powder is sintered to make metal diboride ceramics. The lower-melting metal or compound which the mixed powder contains melts to form a liquid phase and enables the manufacture of a sintered product of high density by a customary sintering operation employing a low temperature. The sintered product having a boron content of 65 to 67 atom % consists solely of metal diboride crystals having a structure of the hexagonal system.

    摘要翻译: 将TiB2,ZrB2和HfB2中的至少一种的粉末与Ti,Zr,Hf,TiB,ZrB和HfB中的至少一种,或与Ti,Zr,Hf,TiB,ZrB和HfB中的至少一种混合,以及 硼粉末,制成可形成硼含量为65〜67原子%的烧结体的混合粉末。 或者,将Ti,Zr,Hf,TiB,ZrB和HfB中的至少一种的粉末与硼粉末混合以制备混合粉末。 混合粉末还可以含有最多达30重量%的AlN粉末。 然后,将混合粉末烧结成金属二硼化物陶瓷。 混合粉末含有的低熔点金属或化合物熔融形成液相,并且能够通过采用低温的常规烧结操作制造高密度烧结产品。 硼含量为65〜67原子%的烧结体仅由具有六方晶系结构的金属二硼化物晶体构成。