The effect of LPSO phase on the high-temperature oxidation of a stainless Mg-Y-Al alloy  

作　　者：Zhipeng Wang Zhao Shen Yang Liu Yahuan Zhao Qingchun Zhu Yiwen Chen Jingya Wang Yangxin Li Sergio Lozano-Perez Xiaoqin Zeng 

机构地区：[1]National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Institute of Medical Robotics,Shanghai Jiao Tong University,Shanghai 200240,China [3]Department of Materials Science,University of Oxford,Parks Road,Oxford OX13PH,UK

出　　处：《Journal of Magnesium and Alloys》2024年第10期4045-4052,共8页镁合金学报(英文)

基　　金：the financial support from the National Key Research and Development Program of China(No.2022YFB3708400);the National Science and Technology Major Project(J2019-VIII-0003-0165);the Space Utilization System of China Manned Space Engineering(No.KJZ-YY-WCL04).

摘　　要：In this study,we investigated the oxidation of the Mg-11Y-1Al alloy at 500℃in an Ar-20%O2environment.Multiscale analysis showed the network-like long-period stacking ordered(LPSO)phase transformed into needle-like LPSO and polygonal Mg24Y5 phases,leading to the formation of a high-dense network of needle-like oxides at the oxidation front.These oxides grew laterally along the oxide/matrix interfaces,forming a thicker,continuous scale that effectively blocked elemental diffusion.Hence,the preferential oxidation along the needle-like LPSO is believed to accelerate the formation of a thicker and continuous oxide scale,further improving the oxidation resistance of the Mg-11Y-1Al alloy.

关 键 词：Mg alloy LPSO phase OXIDATION TEM TKD. 

分 类 号：TG1[金属学及工艺—金属学]