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以含La、Mg、Ni元素的化学试剂为原料,先制得三元复合金属氧化物前驱体;再以优化后的实验参数,进行基于共沉淀及还原扩散法联用工艺制备La0.67Mg0.33Ni3.0合金及其微观结构的研究,并验证新型合成工艺的可行性。结果表明:以共沉淀和还原扩散法制得的合金均为多相结构,其组织和成分趋于均匀化,晶格畸变小;并且合金还原过程比较彻底,合金中含氧量极少,取得了预期的效果;La-Mg-Ni系合金新型合成工艺可行,但还需对该工艺进行再优化。
Using La, Mg, Ni chemical elements as raw materials, a ternary composite metal oxide precursor is prepared first; and then the optimized experimental parameters are used to prepare La0.67Mg0.33Ni3 based on coprecipitation and reduction-diffusion method .0 alloy and its microstructure, and verify the feasibility of the new synthesis process. The results show that the alloys prepared by coprecipitation and reductive diffusion all have multiphase structure, the microstructure and composition tend to be homogenized, the lattice distortion is small, and the reduction process of the alloy is more complete, the content of oxygen in the alloy is very small, Expected results; La-Mg-Ni alloy new synthesis feasible, but the process needs to be re-optimized.