Microstructure and mechanical properties of Mg-4.0Zn alloy reinforced by NiO-coated CNTs
Microstructure and mechanical properties of Mg-4.0Zn alloy reinforced by NiO-coated CNTs
复制标题
NiO涂层碳纳米管增强Mg-4.0Zn合金的显微组织和力学性能
DOI：
10.1016/j.jmst.2016.07.022
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发表时间：
2017-05-01
影响因子：
10.9
通讯作者：
Liu, Yong
中科院分区：
文献类型：
--
作者：
Yuan, Qiuhong;Zeng, Xiaoshu;Liu, Yong
采用球磨和铸造相结合的方法制备了NiO包覆碳纳米管（NiO@CNTs）增强Mg-4. 0 Zn合金复合材料。复合材料的屈服强度（YS）和断裂伸长率分别比合金提高了44.9%和38.6%。复合材料力学性能的显著提高主要归因于界面结合的改善、晶粒的细化以及碳纳米管在基体中的良好分散。在碳纳米管上包覆NiO。结果表明，NiO纳米层在碳纳米管表面的包覆显著提高了界面结合强度，有效地防止了碳纳米管的团聚。因此，NiO@CNTs有望成为具有上级性能的镁基复合材料的高度可持续和可分散的增强体。材料科学与技术学报编辑部版权所有（C）2017爱思唯尔有限公司出版。
Mg-4.0Zn alloy composite reinforced by NiO-coated CNTs (NiO@CNTs) was synthesized by combining ball-milling and a casting process. The yield strength (YS) and elongation to failure of the composite were dramatically increased by 44.9% and 38.6%, respectively, compared to its alloy counterpart. The significantly enhanced mechanical properties of the as-synthesized composite are mainly ascribed to an improved interfacial bond, grain refinement and good dispersion of CNTs in the matrix via. coating NiO on CNTs. It is shown that the NiO-nanolayer on the CNTs significantly enhances the interfacial bonding strength and effectively prevents the agglomeration of CNTs. NiO@CNTs are, therefore, expected to be a highly sustainable and dispersible reinforcement for magnesium matrix composites with superior performance. Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.