摘要
在ZM5镁合金中添加0.1%混合稀土时,阻燃效果最佳,镁合金起燃温度提高到800℃以上。x射线衍射分析(XRD)和扫描电镜分析(SEM&EDS)表明其阻燃机理是在合金液表面形成致密的RE2O3和MgO复合氧化膜,阻止了镁合金的进一步氧化燃烧。高温氧化动力学研究显示:该合金在400℃和700℃氧化符合抛物线规律,而在600℃氧化遵循立方规律。
The ignition temperature of ZM5 magnesium alloy can rise to over 800℃ when the addition of rare earth is 0.1%. By XRD and SEM analysis, the results showed that the mechanism of ignition-proof was the formation of oxide film of compact composite structure consisting of MgO and RE2O3 on the surface of ZM5-0.1% RE alloy, which inhibited magnesium alloy further oxidizing and burning. The research on high temperature kinetics indicated that the oxidation dynamics curves measured at 400℃ and 700℃ followed parabolic law and the curve investigated at 600℃ followed the cubic law.
出处
《冶金丛刊》
2009年第2期1-4,共4页
Metallurgical Collections
基金
广西工学院硕士基金项目(500542)
关键词
稀土
阻燃
镁合金
氧化动力学
机理
rare earth
ingintion-proof
magnesium alloy
oxidation kinetics
mechanism
