4.7 Article

Zone melting under vacuum purification method for high-purity aluminum

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出版社

ELSEVIER
DOI: 10.1016/j.jmrt.2022.01.010

关键词

Aluminum; Folds; Zone melting; Grain morphology; Vacuum

资金

  1. National Science Foundation of China [51734006]
  2. Science and Technological Talent Cultivation Plan of Yunnan Province, China [2017HB009]
  3. Innovative Research Team in University of Yunnan Province [201808]

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The authors discovered folding phenomenon during aluminum zone melting and purification in a protective atmosphere for the first time, which affects aluminum purity and crystal growth; compared to zone melting under a protective atmosphere, vacuum zone melting reduces interfacial folding, leading to improved aluminum purity and larger crystal size.
In this study, the authors discover the phenomenon of folding during the process of zone melting and purification of aluminum in a protective atmosphere, for the first time, and these surface folds tend to affect the purity and crystal growth of aluminum. Compared with zone melting purification under a protective atmosphere, when zone melting under vacuum is used, interfacial folding is reduced, and accordingly, the aluminum purity is improved and grain size is increased. Results show that when the vacuum is controlled at 0.1Pa, the aluminum samples show perfect purity and large crystal particles.(c) 2022 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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