混合稀土阻燃ZM5合金表面氧化膜再生能力研究
Study on Regeneration Ability of Oxidation Film on ZM5 Magnesium Alloys Added with RE
邓正华，李华基，李卫彬
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作者单位：重庆三峡学院机械工程学院；重庆大学材料科学与工程学院；国立釜山大学机械工程学院，
中文关键字：混合稀土；镁合金；氧化膜；氧化动力学；再生能力
英文关键字：rare earth;magnesiurn alloy;oxidation film;oxidation kineties; regeneration ability
中文摘要：将ZM5-0.1%RE合金加热到800℃，当表面氧化膜形成后，冷却至室温，去除掉表面氧化膜，制成经过氧化的ZM5-0.1%RE合金，通过分析该合金的TGA曲线、恒温氧化动力学曲线以及表面氧化膜的XRD谱，对其表面氧化行为进行了研究。结果表明：该合金仍然具有良好的杭氧化性能，氧化增重主要发生在400-700℃区间；该合金在600℃、700℃的氧化动力学曲线遵循抛物线规律，合金表面生成了一层由（RE）2O3、MgO、Al2O3、Mg17Al12组成的厚度为4～5.5um致密氧化膜，抑制基体镁合金的进一步氧化；说明ZM5-0.1%RE合金表面氧化膜有良好的再生能力
英文摘要：The ZM5-0.1%RE magnesium alloy was heated to 800 ℃, when the surface oxide film was formed, the ZM5-0.1% RE Magnesium alloy which had being oxidized obtained by removing the surface oxidation film on the ZM5-0.1%RE magnesium alloy at room temperature. TGA curve, oxidaxion kinetics curves at constant temperatuers of the alloy and XRD spectrum of the surface film were analyzed in order to investigate the sureface oxidation behavior.The results show that the alloy still has anti-oxidation performance, And the oxide inerease occurred mostly between 400℃ and 700℃，a layer of tight oxide film with 4－5.5um and composed of RE2O3,MgO,Al2O3 and Mg17Al12 was formed on the surface of magnesiurn alloy. The tight surface oxide film prevented the further oxidation of the base magnesiurn alloy, It show that the regeneration ability of oxidation film on ZM5-0.1%RE Magnesium Alloy was good.