文章基本信息

标题：Investigation on Damping Capacities of Spherical Mg 2Si Magnesium Matrix Composites Prepared by Super-Gravity Method
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作者：Yun-si Wang ; Rui-long Niu ; Fang-jia Yan 等
期刊名称：MATEC Web of Conferences
电子版ISSN：2261-236X
出版年度：2018
卷号：207
DOI：10.1051/matecconf/201820703019
语种：English
出版社：EDP Sciences
摘要：Due to inherent high damping capacities of Mg, Mg-based alloys or composites can absorb enormous elastic energy, thus, can be used as damping materials playing important role in reducing vibration and noise. Spherical Mg2Si magnesium matrix composites were prepared by super-gravity method with fly ash floating beads with particle sizes of 80, 125 and 500 μm. The microstructures and damping capacities of prepared samples were discussed. Spherical and fragment-shaped Mg2Si phases were observed in the matrix by SEM micrograph. Increasing particle size of fly ash floating beads can lead to an obviously decreasing tendency of internal friction tanφ. The critical strain εcr=1.9×10−2of ε – tanφcurve and critical temperatureTcr=150 °C ofT– tanφcurve for tanφchanging from slowly to greatly increasing. Damping peaks occur in the vicinity of strain ε=5.2×10−2in ε –tanφcurve whereas no damping peaks occur inT–tanφcurve.