La-Mg-Ni系合金新型合成工艺及La_(0.67)Mg_(0.33)Ni_(3.0)合金微结构的研究(英文)  

Research on a New Synthesis Technology of La-Mg-Ni System Alloys and Microstructure of La_(0.67)Mg_(0.33)Ni_(3.0) Alloys

作　　者：张盛强[1] 王大辉[1] 侯新刚[1] 黄秀扬[1] 孙雷雷[1] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《稀有金属材料与工程》2012年第12期2075-2080,共6页Rare Metal Materials and Engineering

基　　金：The PhD Fund Project of Lanzhou University of Technology (BS01200904);Open Foundation of Key Laboratory of the Ministry of Education of Non-ferrous Metal Alloys and Processes (EKL09002)

摘　　要：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。By choosing chemical reagents containing La, Mg, Ni element respectively as raw materials, the precursor of three-element composite metal oxides was prepared at first. With the experimental parameters optimized, research on preparation of La-Mg-Ni system alloys with a new synthesis technology based on co-precipitation and reduction-diffusion, and microstructure of La0.67Mg0.33Ni3.0 alloys, was carried out. And the feasibility of this new synthesis technology has been verified. The results show that the alloys prepared through co-precipitation and reduction-diffusion have a multi-phase structure, their structure and ingredients are even, and their lattice distortion is small. In addition, the reducing process is relatively thorough and the content of oxygen is rare, achieving the expected results. The new synthesis technology is feasible, but it is necessary to optimize the process.

关 键 词：La-Mg-Ni系合金 微结构 共沉淀 还原扩散 

分 类 号：TG146.45[一般工业技术—材料科学与工程]