Development of a High-Damping Composite: Mg2Si/Mg
Development of a High-Damping Composite: Mg2Si/Mg
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DOI：
10.1002/1521-396x(199710)163:2
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发表时间：
1997-10
期刊：
影响因子：
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通讯作者：
Christine Mayencourt;R. Schaller
中科院分区：
文献类型：
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作者：
Christine Mayencourt;R. Schaller
一种新的材料已被处理和表征。它是一种轻质高阻尼复合材料，由单向Mg 2Si纤维嵌入纯镁基体中形成。这种复合材料已产生的Mg-Si近共晶合金（2重量%的Si）的单向凝固。机械强度通过拉伸试验测量，阻尼能力由低频扭摆中的机械光谱测量推导。这些复合材料具有与工业镁铸造合金如AZ 63相当的拉伸强度和高10至100倍的阻尼能力。的力学性能和阻尼能力被解释为功能的样品显微组织，重点对位错的流动性的基体和纤维取向的影响。
A new material has been processed and characterized. It is a lightweight and high-damping composite formed by unidirectional Mg 2 Si fibres embedded in a pure magnesium matrix. This composite has been produced by unidirectional solidification of a Mg-Si near eutectic alloy (2 wt% Si). Mechanical strength was measured through tensile tests and the damping capacity was deduced from mechanical spectroscopy measurements in a low-frequency torsion pendulum. These composites have a tensile strength comparable with industrial magnesium cast alloys such as AZ63 and a damping capacity which is 10 to 100 times higher. The mechanical properties and damping capacity are interpreted as functions of sample microstructure with emphasis on the effects of matrix and fibre orientation on the dislocation mobility.