Effect of YAl2 Particles on the Corrosion Behavior of Mg–Li Matrix Composite in NaCl Solution

Materials

Guoqing Wu¹  Chonggao Bao²  Yongxin Jian²  Zihan Chen²  Li Zhang² 

[1] School of Materials Science and Engineering, Beihang University, Beijing 100191, China;State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi Province, China;

关键词: magnesium;    intermetallics;    metal matrix composites;    XPS;    polarization;    EIS;   

DOI  :  10.3390/ma12030549

来源: DOAJ

【 摘 要 】

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_2p/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.

【 授权许可】

Unknown