Process for forming composites having an intermetallic containing matrix
    9.
    发明授权
    Process for forming composites having an intermetallic containing matrix 失效
    用于形成具有含金属间化合物的基质的复合材料的方法

    公开(公告)号:US4915903A

    公开(公告)日:1990-04-10

    申请号:US190561

    申请日:1988-05-05

    摘要: A method is taught for the formation of intermetallic-second phase composite materials. The method involves the formation of a first metal-second phase composite comprising a relatively high loading of discrete, second phase particles distributed throughout a metal matrix, dilution of the first composite into an additional amount of metal to form a second composite comprising a lower loading of second phase particles within an intermediate metal matrix, and introduction of the second composite into another metal which is reactive with the intermediate metal matrix of the composite to form an intermetallic. A final intermetallic-second phase composite is thereby formed comprising a dispersion of discrete second phase particles throughout a final intermetallic matrix. The final intermetallic matrix may comprise a wide variety of intermetallic materials, with particular emphasis drawn to the aluminides and silicides. Exemplary intermetallics include Ti.sub.3 Al, TiAl, TiAl.sub.3, Ni.sub.3 Al, NiAl, Nb.sub.3 Al, NbAl.sub.3, Co.sub.3 Al, Zr.sub.3 Al, Fe.sub.3 Al, Ta.sub.2 Al, TaAl.sub.3, Ti.sub.5 Si.sub.3, Nb.sub.5 Si.sub.3, Cr.sub.3 Si, CoSi.sub.2 and Cr.sub.2 Nb. The second phase particulate materials may comprise ceramics, such as a borides, carbides, nitrides, oxides, silicides or sulfides, or may comprise an intermetallic other than the matrix intermetallic. Exemplary second phase particulates include TiB.sub.2, ZrB.sub.2, HfB.sub.2, VB.sub.2, NbB.sub.2, TaB.sub.2, MoB.sub.2, TiC, ZrC, HfC, VC, NbC, TaC, WC, TiN, Ti.sub.5 Si.sub.3, Nb.sub.5 Si.sub.3, ZrSi.sub.2, MoSi.sub.2, and MoS.sub.2.

    摘要翻译: 教导了形成金属间化合物 - 第二相复合材料的方法。 该方法包括形成第一金属 - 第二相复合材料,其包含遍布整个金属基体的分散的第二相颗粒的相对较高的载量,将第一复合材料稀释成额外量的金属以形成第二复合材料, 的中间金属基质中的第二相颗粒,以及将第二复合物引入到与复合材料的中间体金属基质反应以形成金属间化合物的另一种金属中。 从而形成最终的金属间化合物 - 第二相复合材料,其包括遍及整个金属间基体的离散的第二相颗粒的分散体。 最后的金属间基体可以包括多种金属间化合物,特别强调铝化物和硅化物。 示例性金属间化合物包括Ti3Al,TiAl,TiAl3,Ni3Al,NiAl,Nb3Al,NbAl3,Co3Al,Zr3Al,Fe3Al,Ta2Al,TaAl3,Ti5Si3,Nb5Si3,Cr3Si,CoSi2和Cr2Nb。 第二相颗粒材料可以包括陶瓷,例如硼化物,碳化物,氮化物,氧化物,硅化物或硫化物,或者可以包括非金属间化合物的金属间化合物。 示例性的第二相颗粒包括TiB2,ZrB2,HfB2,VB2,NbB2,TaB2,MoB2,TiC,ZrC,HfC,VC,NbC,TaC,WC,TiN,Ti5Si3,Nb5Si3,ZrSi2,MoSi2和MoS2。