Fabrication, characterization and mechanical properties of hybrid composites of copper using the nanoparticulates of SiC and carbon nanotubes
Fabrication, characterization and mechanical properties of hybrid composites of copper using the nanoparticulates of SiC and carbon nanotubes
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DOI：
10.1016/j.msea.2013.02.039
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发表时间：
2013-06-10
期刊：
影响因子：
6.4
通讯作者：
Kim, H. S.
中科院分区：
文献类型：
--
作者：
Akbarpour, M. R.;Salahi, E.;Kim, H. S.
采用机械球磨和热压工艺制备了具有最小孔隙率的纳米碳化硅和碳纳米管增强铜基混杂复合材料。利用扫描电子显微镜、X射线衍射、拉曼光谱和扫描透射电子显微镜对粉末和固结材料的微观结构进行了研究。材料的微观结构表征表明，添加纳米碳化硅增强体降低了晶粒生长速率，增强了机械研磨过程中的均匀化。显微硬度测试和压缩试验表明，由于纳米颗粒的加入和晶粒细化，复合材料的力学性能得到了相当大的改善。使用Hall-Fetch、Orowan和热失配机制的理论模型讨论了复合材料的强度，以确定每个机制在总强度中的贡献。(C)2013爱思唯尔有限公司版权所有。
Copper based hybrid composites containing nano-sized silicon carbide and carbon nanotubes reinforcements with minimal porosity were fabricated via mechanical milling followed by hot pressing technique. Microstructures of the powders and consolidated materials were studied using scanning electron microscope, X-ray diffraction, Raman spectroscopy, and scanning transmission electron microscope. Microstructural characterization of the materials revealed that the addition of nanosized silicon carbide reinforcement lowered the grain growth rate and enhanced the homogenization during mechanical milling. Microhardness measurements and compression test showed considerable improvements in mechanical properties of the composites due to the addition of nanoparticulates and the grain refinement. The strength of the composite materials was discussed using theoretical models of the Hall-Fetch, Orowan, and thermal mismatch mechanisms to determine the contribution of each mechanism in total strength. (C) 2013 Elsevier B.V. All rights reserved.