Abstract Homogenization heat treatment of Mg–10 wt% Sn–1.5 wt% Al alloy is studied. The results show that a liquid phase begins to form in the alloy at the temperature (Tm) of 550.2 °C, so the homogenization is performed at 460 °C–510 °C, based on the empirical formula T= (0.9–0.95) Tm. But the surface oxidation phenomenon takes place when treating at 460 °C, which makes the progress of the process difficult to accomplish. Metallograph depicts that wetting phase transformation emerges during the process. For further researching, vacuum quartz tube experiment is conducted, which indicates that the phenomenon is contact with the wetting phase transformation of grain boundaries (GBs) and grain-boundary triple junctions (GB TJs).

中文翻译：

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Mg-10 wt.% Sn-1.5 wt.% Al合金在均质化过程中的表面氧化现象

摘要 研究了Mg-10 wt% Sn-1.5 wt% Al合金的均质化热处理。结果表明，在 550.2 °C 的温度 (Tm) 下合金中开始形成液相，因此根据经验公式 T= (0.9–0.95) 在 460 °C–510 °C 进行均质化Tm值。但在460℃处理时会发生表面氧化现象，使工艺进程难以完成。金相描述了在该过程中出现润湿相变。为了进一步研究，进行了真空石英管实验，表明该现象与晶界（GBs）和晶界三重结（GB TJs）的润湿相变接触。