Effect of heat treatment on oxidation resistance of magnesium alloys with additions of calcium oxide

被引：13
作者：
Liu, S. Y. [1 ]
Liu, G. J. [1 ]
Yu, C. [2 ]
Lippmann, S. [2 ]
Zhu, Y. F. [1 ]
Jiang, Q. [1 ]
机构：
[1] Jilin Univ, Sch Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ, 5988 Renmin St, Changchun 130022, Peoples R China
[2] Friedrich Schiller Univ Jena, Otto Schott Inst Mat Res, Lobdergraben 32, D-07743 Jena, Germany
来源：
CORROSION SCIENCE | 2022年 / 207卷
基金：
中国国家自然科学基金;
关键词：
Magnesium; Oxidation resistance; Composite oxide layer; Heat treatment; HIGH-TEMPERATURE OXIDATION; PLASMA ELECTROLYTIC OXIDATION; CAO; AZ31; AM60; AZ91; BEHAVIOR; LAYERS;
D O I：
10.1016/j.corsci.2022.110558
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The paper investigated the effect of heat treatment on the oxidation resistance (OR) of Mg alloyed by CaO with 1, 3 and 5 wt%. After heat treatment at 400 degrees C in Ar atmosphere, the increase of OR was most striking for CaO at 3 wt%. The improved OR is attributed to a uniform and dense, 50 nm thin protective MgO-CaO composite layer formed on the surface during heat treatment. The protective layer formation is largely caused by outward diffusion of Ca atoms and a gradient in the partial pressure of oxygen.
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页数：9
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