高性能稀土镁合金研究新进展

来源 :中国有色金属学报 | 被引量 : 0次 | 上传用户:jiangchong122
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镁合金作为最为轻质的金属结构材料,是实现航空航天、交通运输以及电子通讯等轻量化的重要材料.然而,镁合金在应用过程中仍面临一系列瓶颈问题.研究结果表明,稀土元素对于改善镁合金的性能具有至关重要的作用.本文聚焦稀土元素对镁合金组织的作用机制,讨论了稀土元素对镁合金塑性变形能力、导热性能及耐腐蚀性能的影响规律.总结发现稀土元素能够通过调控织构和变形过程中的滑移机制提高塑性,影响第二相的析出行为,改善导热性能;改变析出相的化学性质、形貌与分布等提高耐腐蚀性能.展望通过调控稀土元素设计新型高性能结构功能一体化稀土镁合金的发展方向.
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