1. The effect of LPSO phase on the high-temperature oxidation of a stainless Mg-Y-Al alloy
- Author
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Wang, Zhipeng, Shen, Zhao, Liu, Yang, Zhao, Yahuan, Zhu, Qingchun, Chen, Yiwen, Wang, Jingya, Li, Yangxin, Lozano-Perez, Sergio, and Zeng, Xiaoqin
- Subjects
Condensed Matter - Materials Science - Abstract
In this study, we investigated the oxidation of the Mg-11Y-1Al alloy at 500{\deg}C in an Ar-20%O2 environment. 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.
- Published
- 2023