稀土元素在镁合金中能够细化晶粒尺寸,可以利用其固溶强化和第二相强化机制提高合金力学性能,改善镁合金的抗高温蠕变能力.介绍了镁合金的蠕变机理,以及稀土Y元素、Gd元素、Sc元素和Ce元素对镁合金组织和蠕变性能的影响,综述了目前国内外开发的Mg-Y、Mg-Gd、Mg-Sc、Mg-Ce等一系列稀土镁合金的研发现状,对稀土镁合金的发展现状给予意见,并对稀土镁合金的发展前景进行展望.
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