Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements
The strategy of rare-earth elements addition into Mg alloys has been successfully developed and applied to enhance the mechanical performance and corrosion resistance of Mg alloys. Although this strategy has also been applied to enhance their high-temperature oxidation resistance, the mechanistic un...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Materials Today Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590049823001066 |
| _version_ | 1827620791333683200 |
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| author | Zhipeng Wang Zhao Shen Yahuan Zhao Yang Liu Bo Hu Xiaoqing Shang Jingya Wang Yangxin Li Dejiang Li Jianqiang Zhang Sergio Lozano-Perez Frank Czerwinski Xiaoqin Zeng |
| author_facet | Zhipeng Wang Zhao Shen Yahuan Zhao Yang Liu Bo Hu Xiaoqing Shang Jingya Wang Yangxin Li Dejiang Li Jianqiang Zhang Sergio Lozano-Perez Frank Czerwinski Xiaoqin Zeng |
| author_sort | Zhipeng Wang |
| collection | DOAJ |
| description | The strategy of rare-earth elements addition into Mg alloys has been successfully developed and applied to enhance the mechanical performance and corrosion resistance of Mg alloys. Although this strategy has also been applied to enhance their high-temperature oxidation resistance, the mechanistic understanding of the beneficial effects remains elusive. Here, the oxidation of Mg–4Nd and Mg-4Nd–1Y alloys in Ar–20%O2 at 500 °C was studied and compared. It was found that even though a continuous layer of Nd2O3 did not form, the Nd addition could still enhance the oxidation tolerance of Mg–4Nd alloy by facilitating the generation of a more continuous and intact oxide scale and working as oxygen sinks to delay the violent oxidation of Mg. The formation of a continuous Y2O3 layer on Mg-4Nd–1Y alloy suggests that Y was more capable of facilitating the external oxidation due to its much faster diffusion rate in Mg matrix than that of Nd. However, the Nd addition could decrease the critical content of Y necessary for the oxidation transition from internal to external because of the synergistic effect of the Nd and Y addition. The dissolution of the thermal unstable Mg12Nd precipitates resulted in a localized increase of Nd content, accelerating the oxidation by increasing the preferential oxidation of Nd. Hence, in the design of oxidation-resistant Mg alloys, the addition of RE elements with faster diffusion rate and the addition of multiple alloy elements are preferred. In addition, the number of thermal unstable precipitates needs to be strictly controlled. |
| first_indexed | 2024-03-09T10:52:56Z |
| format | Article |
| id | doaj.art-f85df556ce0949cea867c3c980ca9278 |
| institution | Directory Open Access Journal |
| issn | 2590-0498 |
| language | English |
| last_indexed | 2024-03-09T10:52:56Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials Today Advances |
| spelling | doaj.art-f85df556ce0949cea867c3c980ca92782023-12-01T05:02:58ZengElsevierMaterials Today Advances2590-04982023-12-0120100446Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elementsZhipeng Wang0Zhao Shen1Yahuan Zhao2Yang Liu3Bo Hu4Xiaoqing Shang5Jingya Wang6Yangxin Li7Dejiang Li8Jianqiang Zhang9Sergio Lozano-Perez10Frank Czerwinski11Xiaoqin Zeng12National 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, ChinaNational 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; Corresponding author.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, ChinaNational 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, ChinaNational 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, ChinaNational 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, ChinaNational 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, ChinaNational 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, ChinaNational 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; Corresponding author.School of Materials Science and Engineering, University of New South Wales, Sydney NSW 2052, AustraliaDepartment of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UKCanmetMATERIALS, Natural Resources Canada, 183 Longwood Road South, Hamilton, Ontario L8P 0A5, CanadaNational 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; Corresponding author.The strategy of rare-earth elements addition into Mg alloys has been successfully developed and applied to enhance the mechanical performance and corrosion resistance of Mg alloys. Although this strategy has also been applied to enhance their high-temperature oxidation resistance, the mechanistic understanding of the beneficial effects remains elusive. Here, the oxidation of Mg–4Nd and Mg-4Nd–1Y alloys in Ar–20%O2 at 500 °C was studied and compared. It was found that even though a continuous layer of Nd2O3 did not form, the Nd addition could still enhance the oxidation tolerance of Mg–4Nd alloy by facilitating the generation of a more continuous and intact oxide scale and working as oxygen sinks to delay the violent oxidation of Mg. The formation of a continuous Y2O3 layer on Mg-4Nd–1Y alloy suggests that Y was more capable of facilitating the external oxidation due to its much faster diffusion rate in Mg matrix than that of Nd. However, the Nd addition could decrease the critical content of Y necessary for the oxidation transition from internal to external because of the synergistic effect of the Nd and Y addition. The dissolution of the thermal unstable Mg12Nd precipitates resulted in a localized increase of Nd content, accelerating the oxidation by increasing the preferential oxidation of Nd. Hence, in the design of oxidation-resistant Mg alloys, the addition of RE elements with faster diffusion rate and the addition of multiple alloy elements are preferred. In addition, the number of thermal unstable precipitates needs to be strictly controlled.http://www.sciencedirect.com/science/article/pii/S2590049823001066Magnesium alloyPrecipitatesRare-earth elementPreferential oxidationDissolution |
| spellingShingle | Zhipeng Wang Zhao Shen Yahuan Zhao Yang Liu Bo Hu Xiaoqing Shang Jingya Wang Yangxin Li Dejiang Li Jianqiang Zhang Sergio Lozano-Perez Frank Czerwinski Xiaoqin Zeng Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements Materials Today Advances Magnesium alloy Precipitates Rare-earth element Preferential oxidation Dissolution |
| title | Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements |
| title_full | Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements |
| title_fullStr | Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements |
| title_full_unstemmed | Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements |
| title_short | Insights into the design of oxidation-resistant Mg alloy by alloying with rare-earth elements |
| title_sort | insights into the design of oxidation resistant mg alloy by alloying with rare earth elements |
| topic | Magnesium alloy Precipitates Rare-earth element Preferential oxidation Dissolution |
| url | http://www.sciencedirect.com/science/article/pii/S2590049823001066 |
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