Process for preparing self-supporting bodies and products made thereby
    5.
    发明授权
    Process for preparing self-supporting bodies and products made thereby 失效
    制备自支撑体及其制品的方法

    公开(公告)号:US4940679A

    公开(公告)日:1990-07-10

    申请号:US137044

    申请日:1987-12-23

    摘要: Self-supporting bodies are produced by reactive infiltration of a parent metal into boron carbide typically resulting in a composite comprising a boron-containing compound and metal. The mass to be infiltrated may contain one or more inert fillers admixed with the boron carbide, or at least one carbon donor material, to produce a composite by reactive infiltration, which composite comprises a matrix of metal and boron-containing compound embedding the filler. In one embodiment of the invention, a parent metal is reactively infiltrated into a mass comprising a boron carbide material mixed with a carbon-containing compound. In this embodiment, a self-supporting composite is formed typically comprising a boron-containing compound, a carbon-containing compound, and metal. The relative amounts of reactants and process conditions may be altered or controlled to yield a body containing varying volume percents of ceramic, metal and/or porosity. The mass to be infiltrated can be contained within a refractory vessel having a venting means included therein.

    摘要翻译: 通过将母体金属反应性浸渗到碳化硼中而产生自支撑体,通常产生包含含硼化合物和金属的复合材料。 待渗透的物质可以含有一种或多种与碳化硼或至少一种碳供体材料混合的惰性填料,以通过反应性渗透产生复合材料,该复合材料包含嵌入填料的金属和含硼化合物的基质。 在本发明的一个实施方案中,母体金属被反应地渗透到包含与含碳化合物混合的碳化硼材料的组合物中。 在该实施方案中,通常包含含硼化合物,含碳化合物和金属的自支撑复合材料。 可以改变或控制反应物和工艺条件的相对量,以产生包含不同体积百分比的陶瓷,金属和/或孔隙的体。 待渗透的物质可以包含在其中包括排气装置的耐火容器中。