Directional solidification of metal matrix composites
    62.
    发明授权
    Directional solidification of metal matrix composites 失效
    金属基复合材料的定向凝固

    公开(公告)号:US5165463A

    公开(公告)日:1992-11-24

    申请号:US520927

    申请日:1990-05-09

    IPC分类号: C04B41/51 C04B41/88 C22C1/10

    摘要: A metal matrix composite is formed by contacting a molten matrix alloy with a permeable mass of filler material or preform in the presence of an infiltrating atmosphere. Under these conditions, the molten matrix alloy will spontaneously infiltrate the permeable mass of filler material or preform under normal atmospheric pressures. Once a desired amount of spontaneous infiltration has been achieved, or during the spontaneous infiltration step, the matrix metal which has infiltrated the permeable mass of filler material or preform is directionally solidified. The directionally solidified metal matrix composite may be heated to a temperature in excess of the liquidus temperature of the matrix metal and quenched. This technique allows the production of spontaneously infiltrated metal matrix composites having improved microstructures and properties.

    摘要翻译: 金属基质复合材料是通过使熔融基质合金与渗透气体的渗透性物质或预型体接触而形成的。 在这些条件下,熔融基质合金会在正常大气压下自发渗入填料或预型体的渗透物质。 一旦实现了所需量的自发渗透,或者在自发渗透步骤期间,渗透了填充材料或预型体的可渗透物质的基质金属被定向凝固。 可以将定向凝固的金属基质复合材料加热到超过基质金属的液相线温度并淬火。 该技术允许生产具有改进的微结构和性质的自发渗透的金属基质复合材料。

    Method of forming metal matrix composite bodies by utilizing a crushed
polycrystalline oxidation reaction product as a filler, and products
produced thereby
    64.
    发明授权
    Method of forming metal matrix composite bodies by utilizing a crushed polycrystalline oxidation reaction product as a filler, and products produced thereby 失效
    通过利用破碎的多晶氧化反应产物作为填料形成金属基质复合体的方法,以及由此产生的产物

    公开(公告)号:US5007476A

    公开(公告)日:1991-04-16

    申请号:US269306

    申请日:1988-11-10

    摘要: The present invention relates to a novel method for forming metal matrix composite bodies and novel metal matrix composite bodies produced thereby. Particularly, a polycrystalline oxidation reaction product of a parent metal and an oxidant is first formed. The polycrystalline oxidation reaction product is thereafter comminuted into an appropriately sized filler material which can be placed into a suitable container or formed into a preform. The filler material or preform of comminuted polycrystalline oxidation reaction product is thereafter placed into contact with a matrix metal alloy in the presence of an infiltration enhancer, and/or an infiltration enhancer precursor and/or an infiltrating atmosphere, at least at some point during the process, whereupon the matrix metal alloy spontaneously infiltrates the filler material or preform. As a result of utilizing comminuted or crushed polycrystalline oxidation reaction product, enhanced infiltration (e.g., enhanced rate or amount) is achieved. Moreover, novel metal matrix composite bodies are produced.