| Low-frequency damping behavior of closed-cell Mg alloy foams reinforced with SiC particles |
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| 作者姓名： | Wen-zhan Huang Hong-jie Luo Yong-liang Mu Hao Lin Hao Du |
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| 作者单位： | School of Metallurgy, Northeastern University, Shenyang 110819, China |
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| 基金项目： | This work was financially supported by the National Natural Science Foundation of China，the Science and Technology Department of Liaoning Province of China，the Fundamental Research Funds for the Central Universities |
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| 摘 要： | The damping properties of an Mg alloy foam and its composite foams were investigated using a dynamic mechanical thermal analyzer. The results show that the loss factors of both the Mg alloy and its composite foams are insensitive to temperature and loading frequency when the temperature is less than a critical temperature Tcrit. However, it increases when the temperature exceeds the Tcrit values, which are 200 and 250℃ for the Mg alloy foam and the Mg alloy/SiCp composite foams, respectively. The Mg alloy/SiCp composite foams exhibit a higher damping capacity than the Mg alloy foam when the temperature is below 200℃. By contrast, the Mg alloy foam exhibits a better damping capacity when the temperature exceeds 250℃. The variation in the damping capacity is attributed to differences in the internal friction sources, such as the characteristics of the matrix material, abundant interfaces, and interfacial slipping caused by SiC particles, as well as to macrodefects in the Mg alloy and its composite foams.
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| 关 键 词： | magnesium alloys foams silicon carbide damping |
Low-frequency damping behavior of closed-cell Mg alloy foams reinforced with SiC particles |
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| Wen-zhan Huang,Hong-jie Luo,Yong-liang Mu,Hao Lin,Hao Du.Low-frequency damping behavior of closed-cell Mg alloy foams reinforced with SiC particles[J].International Journal of Minerals,Metallurgy and Materials,2017,24(6):701-707. |
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| Authors: | Wen-zhan Huang Hong-jie Luo Yong-liang Mu Hao Lin Hao Du |
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| Institution: | 1. School of Metallurgy,Northeastern University,Shenyang 110819,China;Engineering Research Center of the Ministry of Education for Advanced Materials Preparation Technology,Shenyang 110819,China;2. Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China |
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| Abstract: | The damping properties of an Mg alloy foam and its composite foams wereinvestigated using a dynamic mechanical thermal an-alyzer. The results show that the loss factors of both the Mg alloy and its composite foams are insensitive to temperature and loading fre-quency when the temperature is less than a critical temperatureTcrit. However, it increases when the temperature exceeds theTcrit values, which are 200 and 250℃ for the Mg alloy foam and the Mg alloy/SiCp composite foams, respectively. The Mg alloy/SiCp composite foams exhibit a higher damping capacity than the Mg alloy foam when the temperature is below 200℃. By contrast, the Mg alloy foam exhibits a better damping capacity when the temperature exceeds 250℃. The variation in the damping capacity is attributed to differences in the inter-nal friction sources, such as the characteristics of the matrix material, abundant interfaces, and interfacial slipping caused by SiC particles, as well as to macrodefects in the Mg alloy and its composite foams. |
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| Keywords: | magnesium alloys foams silicon carbide damping |
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