Lightweight NiTi shape memory alloy based composites with high damping capacity and high strength
Lightweight NiTi shape memory alloy based composites with high damping capacity and high strength
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DOI：
10.1016/j.jallcom.2009.10.025
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发表时间：
2010-02
影响因子：
6.2
通讯作者：
Dao-xi Li;Xiaoqing Zhang;Z. Xiong;Y. Mai
中科院分区：
文献类型：
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作者：
Dao-xi Li;Xiaoqing Zhang;Z. Xiong;Y. Mai
开发了一种结合成孔技术、粉末烧结和轻金属（Mg）无压浸渗的创新方法，成功地制备了NiTi形状记忆合金基复合材料（即，Mg/NiTi）。Mg/NiTi复合材料具有高阻尼、高断裂强度和低密度等优异的力学性能和物理性能。该复合材料具有比多孔NiTi合金更高的抗压强度和超过2%的超弹性。采用储能模量与内耗的乘积（EIF）方法，考虑内耗与模量的协同作用，系统评价了Mg/NiTi复合材料的阻尼性能，并确定了几种阻尼机制。
An innovative method combining pore-forming technique, powder sintering and pressureless infiltration of light metal (Mg) was developed to successfully fabricate NiTi shape memory alloy based composites (i.e., Mg/NiTi). The Mg/NiTi composites possess excellent mechanical and physical properties, such as high damping capacity, high fracture strength and low density. The composites show higher compressive strength than the porous NiTi alloys and exhibit excellent superelasticity over 2%. The product of storage modulus and internal friction (EIF) is used to evaluate systematically the damping performance of Mg/NiTi composites by considering the synergy effect of internal friction and modulus, and several damping mechanisms have been identified.