轻稀土资源在镁合金中的应用及研究进展

Research Progress in Application of Light Rare Earths in Magnesium Alloys

稀土是重要的战略资源,白云鄂博矿中含有高丰度的轻稀土元素镧、铈、镨、钕和钐。主要概述了近些年来以上几种轻稀土元素应用于改善镁合金的强塑性、耐热性、耐腐蚀性及导热系数等方面的作用机制研究进展及应用现状,目前大多数研究主要集中于轻稀土元素对镁合金单一性能的影响,镁合金的广泛工业化应用往往需要其兼具多方面的优良性能,深入研究轻稀土元素对镁合金不同性能的交互影响规律和作用机制,对于开发满足市场需求的新型稀土镁合金材料具有重要意义。

Rare earth is an important strategic resource. There exist abundant light rare earths such as La, Ce, Pr, Nd and Sm in the Bayan Obo mineral located in Inner Mongolia of our country. The present work reviews the development of the above mentioned rare earths in the modification of magnesium alloys, which mainly focuses on the aspects of strength and ductility, heat resistant, corrosion resistant and thermal conductivity. Most studies have only investigated the influence of light rare earths on the sole specific property of magnesium alloys so far, however, in order to meet the needs of commercial products, multiple excellent properties are usually expected, therefore, further investigations are needed to reveal the interactive laws of different properties and their mechanisms through rare earth modification, which plays significant role on the development of new rare earth magnesium alloys for commercial application.