中文摘要：

在不同球磨时间条件下，采用机械球磨方法制备TiB2-Ni（Al）复合粉末，其中Ni粉和Al粉的物质的量比为1：1，TiB2陶瓷相含量为40％（体积分数）。采用扫描电子显微镜（SEM）以及X射线衍射仪（XRD）分析球磨后粉末的显微组织结构及物相，研究不同球磨时间对制备TiB2-Ni（Al）复合粉末物相演变、组织结构的影响。研究结果表明，随着球磨时间的延长，延性金属Ni和Al变形程度逐渐增大，粉末中呈现Ni／Al交替混合组织结构，此种结构有利于金属在球磨过程中扩散形成Ni（Al）固溶体，且逐渐细化的TiB2相嵌入至金属Ni和Al颗粒中。通过物相分析发现，随着球磨时间的延长，Al衍射峰强度逐渐降低，并发现在球磨时间为36h时形成Ni（Al）固溶体。

英文摘要：

TiB2-Ni（Al） composite powder was prepared by mechanical alloying method under different milling time. The atom ratio of Ni and Al was 1 ： 1, and the volume content of TiB2 was 40 %. The microstructure and phase compositions of ball milled TiB2-Ni（AI） composite powders were investigated by scanning electron microscopy （SEM） and X-ray diffraction （XRD）, respectively. The influence of microstructure and phase compositions of ball milled TiB2-Ni（Al） was investigated. The results show that with the milling time prolonging, the deformation of Ni and Al is progressively heightened. The diffusion between Ni/Al to form Ni（Al） solid solution is improved by the alternate microstructure of Ni/Al in powder, and finer TiBz particles are inserted into metal particles. The peak of AI is gradua- lly decreased, it also reveals that Al element diffuses into to Ni to form Ni（Al） solid solution.