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

机译:YAl2颗粒对NaCl溶液中Mg-Li基复合材料腐蚀行为的影响

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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 YAl2p/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.
机译:通过金属间化合物YAl2颗粒的复合强化,Mg-Li合金的强度得到了极大的提高,但是Mg-Li合金的低耐蚀性仍然是限制合金及其复合材料应用的主要因素。本文系统地研究了YAl2颗粒对Mg-Li合金腐蚀行为的影响。结果表明,YAl2p / LA143复合材料的耐蚀性可以得到显着提高,这是通过添加YAl2颗粒形成过渡界面层的原因。钇和铝原子从YAl2颗粒中的扩散改善了表面膜的稳定性,并增强了腐蚀产物与基材之间的附着力,从而阻碍了点蚀的进一步扩展。

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