KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Effect of Ce addition on the high-temperature oxidation resistance of Mg-Gd alloys | |
Yu, Xiaowen1,2; Li, Jing2; Jiang, Bin3; Yang, Chuan1,4 ; Yang, Jiping1; Chen, Sanxing1
| |
| 2022-05-09 | |
| 摘要 | In the present study, the oxidation resistance of magnesium alloyed with Gd and Ce was investigated. The high-temperature oxidation resistance of Mg-3.5Gd-xCe (x = 0, 0.2, 0.4, 0.7 and 1.0 wt%) alloys was evaluated at temperatures between 550 degrees C and 650 degrees C. Results indicate that adding less than 0.7 wt% Ce resulted in high oxidation resistance, whereas the Ce addition exceeding 0.7 wt% deteriorated the oxidation resistance. The high oxidation resistance phenomenon is attributed to the formation of compact oxide films primarily composed of MgO, Gd2O3, and a small amount of CeO2 on the surface of Mg-3.5Gd-0.2Ce and Mg-3.5Gd-0.4Ce alloys. These compact oxide films can prevent the matrix from experiencing further oxidation. The deteriorated oxidation resistances of Mg-3.5Gd-0.7Ce and Mg-3.5Gd-1Ce alloys were found to be due to the severe internal oxidation caused by the distributed Mg12Ce phases along the grain boundaries. |
| 关键词 | Ce Gd Mg oxidation oxide film |
| DOI | 10.1002/maco.202113005 |
| 发表期刊 | MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
 |
| ISSN | 0947-5117 |
| 页码 | 10 |
| 通讯作者 | Yang, Chuan(yang5103@tom.com) |
| 收录类别 | SCI |
| WOS记录号 | WOS:000792451200001 |
| 语种 | 英语 |
