真空升华气化法回收ZM6稀土镁合金废料的研究

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-05-23 DOI:10.1016/j.vacuum.2025.114446

Lipeng Wang , Meng Wang , Dong Liang , Yang Tian , Bin Yang , Baoqiang Xu , Wenlong Jiang , Fei Wang

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引用次数: 0

摘要

镁合金具有很大的轻量化潜力，在汽车工业中得到了广泛的应用。稀土镁（RE- mg）合金经稀土元素强化，其优异的性能使其在关键航空航天部件上的应用得到了扩展。然而，航空航天应用的严格要求导致产量降低，不可避免地产生大量含re的镁合金废料。传统的回收方法有危害环境和损失有价值的稀土元素的风险。提出了一种真空升华气化工艺从ZM6稀土镁合金中回收镁和钕。通过热力学分析，评价了分离和回收镁、钕的可行性及其分离能力，并预测了气相元素的含量和行为。实验结果证实真空升华气化在热力学上是可行的。在最佳气化条件下，气化压力为10 Pa，气化温度为750℃，保温时间为120 min，可制得纯度为99.936 wt%的镁和纯度为83.84 wt%的钕。本研究为促进镁的可持续循环，最大限度地利用可再生能源资源提供了新的思路和指导。

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Study on recycling of ZM6 rare-earth magnesium alloy scrap by vacuum sublimation gasification

Magnesium (Mg) alloys have great potential for lightweight use and are widely applied in automotive industry. Rare earth magnesium (RE-Mg) alloys, enhanced with rare earth (RE) elements, and their superior properties enable their expanded application in key aerospace components. However, the stringent requirements in aerospace applications lead to lower production yields, inevitably generating a significant amount of RE-containing Mg alloy scrap. Traditional recycling methods risk environmental harm and loss of valuable RE elements. This study proposes a vacuum sublimation gasification process for recycling Mg and neodymium (Nd) from ZM6 RE magnesium alloy. Through thermodynamic analysis, the feasibility of separating and recycling Mg and Nd was evaluated, along with its separation capacity, and the content and behavior of elements in the gas phase were predicted. Experimental results confirm that vacuum sublimation gasification is thermodynamically viable. Under optimal gasification conditions—pressure of 10 Pa, gasification temperature of 750 °C, and holding time of 120 min—recycled Mg with a purity of 99.936 wt% and Nd with a purity of 83.84 wt% were obtained. This research provides novel ideas and guidance for enhancing the sustainable circulation of Mg and maximizing the utilization of RE resources.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.