Effect of YAl₂ Particles on the Corrosion Behavior of Mg⁻Li Matrix Composite in NaCl Solution.
作者信息
Chen Zihan, Bao Chonggao, Wu Guoqing, Jian Yongxin, Zhang Li
机构信息
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi Province, China.
School of Materials Science and Engineering, Beihang University, Beijing 100191, China.
出版信息
Materials (Basel). 2019 Feb 12;12(3):549. doi: 10.3390/ma12030549.
The strength of Mg⁻Li alloy is greatly improved by the composite strengthening of intermetallic compound YAl₂ particles, but the low corrosion resistance of Mg⁻Li alloy is still the main factor that restricts the application of the alloy and its composites. In this paper, the effect of YAl₂ particles on the corrosion behavior of Mg⁻Li alloy was systematically investigated. The results showed that the corrosion resistance of YAl/LA143 composite could be significantly improved, accounting for the formation of a transitional interface layer by adding YAl₂ particles. The diffusion of yttrium and aluminum atoms from YAl₂ particulates improved the stability of the surface film and enhanced the adhesion between the corrosion products and the substrate, which hindered further expansion of pitting.
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