合金元素对纯铝导电性能的影响机制

doi:10.11896/cldb.20100289

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Abstract In this study, 21kinds of alloying elements were chosen and their effects on electrical conductivity of pure aluminum were experimentally stu-died. The influencing factors and mechanisms were comprehensively analyzed. Ordinally, the electrical conductivity of aluminum alloys show a decreasing trend with increasing in the addition content of alloying elements. The elements with little or no solid solubility in α-Al matrix have rela-tively small effect on the electrical conductivity. However, the elements which were solidly soluble in α-Al matrix have a relatively large effect on the conductivity, and the magnitude of the decline is closely related to the elements' type. The effect of solute elements on the resistivity of aluminum alloys was affected by the combined action of the atomic radius differences(Δr) between the solute atoms and the matrix Al atom, the differences in valence, the extra-nuclear electron distribution and the type of solidification reaction. Among them, valence differences and the type of solidification reaction played major controlling roles, followed by the extra-nuclear electron distribution. The transitional elements had characto-ristics, such as large differences in valence and peritectic reaction with Al, as well as many outer electron vacancies, which led to the rapid decrease of conductivity.

Key words： aluminum alloy electrical conductivity valence atomic radius extranuclear electron

Published: 25 December 2021 Online: 2021-12-27

CLC number:

TG146.2

Fund:This work was financially supported by Enterprise Commissioning Project (20180358).

About author: Jing Liuis an academic master in materials science and engineering from South China University of Technology. She received the bachelor of engineering degree in materials science and engineering from Chongqing University from September 2014 to June 2018. After graduation, she was promoted to South China University of Technology to pursue her master's degree. Her research interests are mainly in the organization control and mechanism analysis of light alloys.

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	LIU Jing
	WEN Cheng
	GAN Junqi
	LUO Gan
	DU Jun

Cite this article:

LIU Jing,WEN Cheng,GAN Junqi, et al. Influencing Mechanisms of Alloying Elements on the Electrical Conductivity of Pure Aluminum[J]. Materials Reports, 2021, 35(24): 24101-24106.

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http://www.mater-rep.com/EN/10.11896/cldb.20100289 OR http://www.mater-rep.com/EN/Y2021/V35/I24/24101

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