利用机械合金化和高温热压工艺制备NiAl纳米晶体材料，并研究了材料的微观组织和力学性能，结果表明，NiAl的反应生成归结于机械碰撞诱发的爆炸反应机制.采用高温热压工艺可制备接近完全致密的纳米晶NiAl块体材料，NiAl纳米晶体材料的室温强度和塑性都高于铸态NiAl．纳米晶NiAl的高温强度依赖于应变速率，变形受扩散机制控制 NiAl nanocrystalline materials were prepared by mechanical alloying and high temperature hot pressing process, and the microstructure and mechanical properties of the materials were studied. The results show that the reaction mechanism of NiAl is attributed to the explosion reaction mechanism induced by mechanical impact. Near absolute density of nanocrystalline NiAl bulk materials, NiAl nanocrystalline materials at room temperature strength and plasticity are higher than the cast NiAl. The high temperature strength of nanocrystalline NiAl depends on the strain rate, and the deformation is controlled by the diffusion mechanism