采用机械合金化+热压工艺制备了成分为Cr-77.5at.％Nb的Nb/NbCr2合金.分别在800,1000,1200℃对其进行10,30,50,100h的真空热暴露实验,研究热暴露对合金组织及性能的影响.结果表明,随着热暴露温度升高和时间延长,Nb/NbCr2合金的相对密度略有增加,1200℃热暴露100h后,合金的相对密度由热暴露前的99.1％增大至99.6％.合金在整个热暴露过程中没有明显的物相变化.合金的维氏硬度随着热暴露时间的延长呈现先升后降的变化趋势；随着热暴露温度升高和时间延长,合金的断裂韧度逐渐下降；合金的室温抗压强度和塑性应变随热暴露时间的延长逐渐增大,屈服强度随热暴露时间延长先增后降.
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