Mg100—xNix（x=7—79）合金机械合金化制备研究

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Ｍｇ２Ｎｉ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＝３３４，４３，５５，６７，７０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

Abstract:

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:[phone]