Investigating Impurities Removal Behavior from Terbium by the Combined Plasma Melting and Directional Solidification

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-05-30 DOI:10.1007/s12540-024-01708-7

Ning Mao, Hongbo Yang, Wenli Lu, Xiaowei Zhang, Wensheng Yang, Chuang Yu, Xinyu Guo, Yibo Zhang, Zengdong Pang, Jiamin Zhong, Zhiqiang Wang

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Abstract

The combined argon plasma melting and directional solidification method (denoted as APDS) was innovatively proposed to enhance the purification efficiency of Tb metal in this work. Theoretical computation and experimental analysis were used to explore the removal behavior of the three impurity groups during APDS, which included high volatility impurities of Ca, Mg, Mn and Cr, medium volatility impurity of Ti, and low volatility impurities of Al and Ni. The evaporation removal ratio of Ca and Mg after APDS process exceeds 99.9%, indicating that Ca and Mg are mainly removed by vacuum volatilization. Mn, Cr, Ti, Ni, and Al had evaporative removal ratios of 49%, 37%, 1.3%, 7%, and 14%, respectively. And the contents of these impurities increases with the increase of solidification fraction. It was shown that Mn and Cr were removed by the combined action of volatilization and directional solidification, and Ti, Ni and Al were primarily removed by the directional solidification. By using the innovative combination approach, the impurities in Tb were removed simultaneously and effectively.

Graphical Abstract

Abstract Image

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研究等离子熔化和定向凝固相结合的铽杂质去除行为

本研究创新性地提出了氩等离子体熔化和定向凝固相结合的方法（简称 APDS），以提高钽金属的纯化效率。通过理论计算和实验分析，探讨了三组杂质在 APDS 过程中的去除行为，包括高挥发性杂质 Ca、Mg、Mn 和 Cr，中等挥发性杂质 Ti，以及低挥发性杂质 Al 和 Ni。经过 APDS 工艺后，Ca 和 Mg 的蒸发去除率超过 99.9%，表明 Ca 和 Mg 主要通过真空挥发去除。Mn、Cr、Ti、Ni 和 Al 的蒸发去除率分别为 49%、37%、1.3%、7% 和 14%。这些杂质的含量随着凝固分数的增加而增加。研究表明，锰和铬在挥发和定向凝固的共同作用下被去除，而钛、镍和铝则主要通过定向凝固去除。通过使用创新的组合方法，钽中的杂质被同时有效地去除。

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.