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    • 9. 发明授权
    • Rhenium composite alloys and a method of preparing same
    • 铼复合合金及其制备方法
    • US07592073B2
    • 2009-09-22
    • US11236025
    • 2005-09-27
    • Jerry W. BrockmeyerClifford C. Bampton
    • Jerry W. BrockmeyerClifford C. Bampton
    • B32B15/00C22C27/00
    • C22C27/00B22F2009/043B22F2999/00C22C1/1084C22C32/0031C22C32/0084Y10T428/12771B22F2202/03
    • A rhenium alloy is provided having from about 50 atomic % to 99 atomic % rhenium and a refractory compound particulates that are present in the alloy in an amount up to about 10 atomic %. The refractory compound comprises a nano-scale dispersion that is incorporated into the conventional rhenium structure. The nano-scale dispersion acts as grain boundary pins that result in a relatively fine grained, equiaxed structure that improves the mechanical properties of the alloy and helps to minimize the growth of large grains during operations at high temperatures. As a result, the amount of the rhenium used in high temperature applications may be reduced without sacrificing its high temperature and mechanical properties. Cryomilling in the presence of nitrogen may be used to prepare the rhenium alloy having a stable fine grain structure at high temperatures.
    • 提供了具有约50原子%至99原子%铼的铼合金和以约10原子%的量存在于合金中的耐火复合颗粒。 难熔化合物包含纳入常规铼结构的纳米级分散体。 纳米级分散体作为晶界引脚,其导致相对细晶粒的等轴结构,其改善合金的机械性能,并有助于在高温操作期间最大限度地减少大晶粒的生长。 结果,可以在不牺牲其高温和机械性能的情况下降低在高温应用中使用的铼的量。 在氮气存在下进行冷冻可以用于制备在高温下具有稳定的细晶粒结构的铼合金。