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中文摘要：
通过铝热法制备了Cu含量为2%,4%,6%（质量分数,下同）的Fe3Al-10%Ni块体纳米晶材料,用光学显微镜（OM）,电子探针（EPMA）,X-射线衍射仪（XRD）和透射电镜（TEM）表征了材料的微观结构,并测定了材料的维氏硬度和室温压缩性能。结果表明：Cu含量低（2%）时,合金保持无序bcc结构,晶粒尺寸显著下降;高Cu含量（4%和6%）使合金发生B2型有序化转变。添加Cu元素提高了材料的硬度,但不利于材料塑性的提高。添加2%和6%的Cu元素使材料的屈服强度明显增加,而添加4%的Cu元素使材料的强度明显下降。
英文摘要：
Effects of Cu additions on microstructure and mechanical properties of Fe3Al-10%Ni bulk nanocrystalline prepared by aluminothermic reaction were studied.The microstructure was studied by OM,EPMA,XRD and TEM,and the hardness and compressive strength were measured.The results reveal that the low Cu content（2%） maintained the bcc crystal structure and resulted in a sharp decrease of the average grain size.However,high Cu contents（4% and 6%） caused the structure ordering to B2.The hardness increased after adding Cu.A high Cu content was not benefit to the plasticity.The yield strength increased slightly at 2% and 6% Cu,but decreased a lot at 4% Cu.
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