摘要
研究了不同成分的Mg－Ni合金（Mg100-xNix，x＝7～79）的机械合金化制备。实验结果表明，在机械球磨的条件下，其相变过程和相变产物与熔炼合金有很大差异。在所研究的10个成分中，当x＝7，12时，球磨产物为Mg2Mi金属间化合物与晶态Mg的混合相；当x＝18，25时，则形成单相的纳米晶Mg2Ni；当x＝33，43，55，67，70时，合金粉末发生非晶化转变，形成单一的非晶相，且对于不同的成分其非晶化途径有很大差异；当x＝79时，形成单相的面心立方结构过饱和固溶体。同时还对其形成机制及转变过程进行了分析讨论。
The preparation of a Mg-Ni alloy (Mg100-xNix x=7-79) by mechanical alloying is studied. The results show that a great difference exists between the as-milled product and the conventional product. For x=7, 12, the as-milled products are mixtures of the intermetallic compound Mg2Ni and crystalline Mg. For x=18 and 25, the final products are the single phase nanocrystalline Mg2Ni. In the case of x=33, 43, 55, 67 and 70, the as-milled powders are the amorphous and the amorphization reaction paths are strongly dependent on the compositions. For x= 70, a single fee supersaturated solid solution forms. The mechanism of transformation is also discussed in detail.Correspondent: Ji Shijun, Lecturer, Institute of Materials and Technology, Dalian Maritime University, Dalian 116026, P. R. China,Tel:086-441-4671611
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1998年第5期271-274,共4页
Rare Metal Materials and Engineering
关键词
Mg-Ni合金系
机械合金化
MG2NI
贮氢合金
Mg-Ni alloy system, mechanical alloying, Mg_2Ni, amorphous phase, supersaturated solid solution
