Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification
To achieve simultaneous improvement in wear resistance and corrosion resistance, we propose a novel strategy to successfully develop Mg matrix composites containing blocky primary Mg2Si with small size instead of undesirable dendrite shape and large size. The tribological and corrosion behavior of M...
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KeAi Communications Co., Ltd.
2024-11-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956723001913 |
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| author | Peng Xiao Yimin Gao Yupeng Sheng Cuicui Yang Zhiwei Liu Yanliang Yi Wenyu Wu Qiqiang Zhao Manoj Gupta |
| author_facet | Peng Xiao Yimin Gao Yupeng Sheng Cuicui Yang Zhiwei Liu Yanliang Yi Wenyu Wu Qiqiang Zhao Manoj Gupta |
| author_sort | Peng Xiao |
| collection | DOAJ |
| description | To achieve simultaneous improvement in wear resistance and corrosion resistance, we propose a novel strategy to successfully develop Mg matrix composites containing blocky primary Mg2Si with small size instead of undesirable dendrite shape and large size. The tribological and corrosion behavior of Mg2Si/AZ91 unmodified and modified with 2.0wt.%Sb was subsequently and systematically investigated. The results show that Sb addition can significantly modify the morphology of primary Mg2Si to blocky polygon with smaller size of 12-25 µm, but has less effect on α-Mg grain size. Compared with unmodified composite, Sb modified Mg2Si/AZ91 composite has higher Brinell hardness and nearly unchanged microhardness of the matrix. Sb modified composite exhibits a 26% lower wear loss than unmodified composite, suggesting the greatly improved wear resistance. Microstructure analyses indicate that the main wear mechanism of composites is dominated by abrasive wear, and Sb addition can decrease the width and depth of grooves, resulting in a weakened abrasive wear behavior. Additionally, microcracks initiation on Sb modified Mg2Si particles can be restricted during the sliding friction process because of higher toughness and blocky polygonal shape induced by Sb doping, which is responsible for the improved wear resistance. Interestingly, Sb modified Mg2Si/AZ91 composite also demonstrates a superior corrosion resistance than unmodified composite due to the decrease of calculated corrosion rate from 1.57 mm/y to 0.74 mm/y, reduced by 52.8%. Such improvement is closely related to the reduced susceptibility to micro-galvanic corrosion, which is attributed to the reduced volta potential difference of Mg2Si relative to the Mg matrix, from 365 mV to 210 mV. |
| format | Article |
| id | doaj-art-ced84b2d515d410a8a73a4ab6b7ef4c9 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-ced84b2d515d410a8a73a4ab6b7ef4c92025-01-05T04:28:01ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-11-01121144934508Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modificationPeng Xiao0Yimin Gao1Yupeng Sheng2Cuicui Yang3Zhiwei Liu4Yanliang Yi5Wenyu Wu6Qiqiang Zhao7Manoj Gupta8State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi Province 710049, PR China; Corresponding authors.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi Province 710049, PR ChinaXi'an Modern Chemistry Research Institute, Xi'an 710065, Shaanxi Province, PR ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi Province 710049, PR China; Corresponding authors.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi Province 710049, PR ChinaInstitute of Advance Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, Guangdong 510632, PR ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi Province 710049, PR ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi Province 710049, PR ChinaDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore; Corresponding authors.To achieve simultaneous improvement in wear resistance and corrosion resistance, we propose a novel strategy to successfully develop Mg matrix composites containing blocky primary Mg2Si with small size instead of undesirable dendrite shape and large size. The tribological and corrosion behavior of Mg2Si/AZ91 unmodified and modified with 2.0wt.%Sb was subsequently and systematically investigated. The results show that Sb addition can significantly modify the morphology of primary Mg2Si to blocky polygon with smaller size of 12-25 µm, but has less effect on α-Mg grain size. Compared with unmodified composite, Sb modified Mg2Si/AZ91 composite has higher Brinell hardness and nearly unchanged microhardness of the matrix. Sb modified composite exhibits a 26% lower wear loss than unmodified composite, suggesting the greatly improved wear resistance. Microstructure analyses indicate that the main wear mechanism of composites is dominated by abrasive wear, and Sb addition can decrease the width and depth of grooves, resulting in a weakened abrasive wear behavior. Additionally, microcracks initiation on Sb modified Mg2Si particles can be restricted during the sliding friction process because of higher toughness and blocky polygonal shape induced by Sb doping, which is responsible for the improved wear resistance. Interestingly, Sb modified Mg2Si/AZ91 composite also demonstrates a superior corrosion resistance than unmodified composite due to the decrease of calculated corrosion rate from 1.57 mm/y to 0.74 mm/y, reduced by 52.8%. Such improvement is closely related to the reduced susceptibility to micro-galvanic corrosion, which is attributed to the reduced volta potential difference of Mg2Si relative to the Mg matrix, from 365 mV to 210 mV.http://www.sciencedirect.com/science/article/pii/S2213956723001913Mg matrix compositesMorphological regulationWear resistanceCorrosion resistanceSb modification |
| spellingShingle | Peng Xiao Yimin Gao Yupeng Sheng Cuicui Yang Zhiwei Liu Yanliang Yi Wenyu Wu Qiqiang Zhao Manoj Gupta Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification Journal of Magnesium and Alloys Mg matrix composites Morphological regulation Wear resistance Corrosion resistance Sb modification |
| title | Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification |
| title_full | Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification |
| title_fullStr | Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification |
| title_full_unstemmed | Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification |
| title_short | Improving wear and corrosion resistances of Mg2Si/AZ91 composites via tailoring microstructure and intrinsic properties of Mg2Si induced by Sb modification |
| title_sort | improving wear and corrosion resistances of mg2si az91 composites via tailoring microstructure and intrinsic properties of mg2si induced by sb modification |
| topic | Mg matrix composites Morphological regulation Wear resistance Corrosion resistance Sb modification |
| url | http://www.sciencedirect.com/science/article/pii/S2213956723001913 |
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