Formation mechanism of quasicrystals at the nanoscale during hot compression of Mg alloys
Formation mechanism of quasicrystals at the nanoscale during hot compression of Mg alloys
生物室袁广银教授指导的博士生黄华在国际重要期刊《Scripta Materialia》发表了论文“Formation mechanism of quasicrystals at the nanoscale during hot compression of Mg alloys” (IF=3.162, Scripta Materialia 78-79 (2014) 61-64). 本文采用透射电镜详细研究了Mg-1.5Zn-0.25Gd合金热压缩过程中的第二相演变过程。结果发现：铸态合金中的针状Mg4Zn7相在热压缩的过程中逐渐消失，形成纳米准晶相；纳米准晶相可在Mg4Zn7相上形核，并具有如下取向关系：[11-20]Mg4Zn7平行于[2-fold]准晶相，这也说明晶体相可以转变为准晶相，据此对镁合金中纳米准晶相的析出机制进行了讨论与分析。
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