Improving the mechanical properties of carbon nanotubes reinforced pure aluminum matrix composites by achieving non-equilibrium interface
Improving the mechanical properties of carbon nanotubes reinforced pure aluminum matrix composites by achieving non-equilibrium interface
复制标题
通过实现非平衡界面提高碳纳米管增强纯铝基复合材料的力学性能
DOI：
10.1016/j.matdes.2017.01.096
复制
发表时间：
2017-04-15
影响因子：
8.4
通讯作者：
Du, Yong
中科院分区：
文献类型：
--
作者：
Guo, Baisong;Song, Min;Du, Yong
碳纳米管（CNTs）与Al基体之间的弱界面结合是Al/CNTs复合材料实现高强度和良好延展性的关键问题，从而阻碍了复合材料的广泛应用。在这里，我们获得了一种非平衡界面，该界面可以在通过放电等离子烧结（SPS）和随后的热挤压制造的Al/CNTs复合材料中的CNT和Al基体之间提供紧密的界面结合。这种特殊的界面，伴随着细小的晶粒尺寸、均匀的分散和碳纳米管的完整性，可以显着提高Al/碳纳米管复合材料的机械性能。此外，还研究了初始铝基粉末尺寸对复合材料机械性能的影响。结果表明，初始基体粉末的尺寸影响了碳纳米管的分散以及碳纳米管与铝基体之间的界面，从而影响了力学性能。这项工作为具有优异界面结合强度的高性能金属基复合材料提供了新的名称。 (C) 2017 Elsevier Ltd. 保留所有权利。
The weak interfacial bonding between carbon nanotubes (CNTs) and Al matrix is a critical issue for the achievdment of high strength and good ductility of Al/CNTs composites, and thus hinders the wide application of the composites. Here we obtained a non-equilibrium interface that can provide tight interfacial bonding between the CNTs and Al matrix in the Al/CNTs composites fabricated through spark plasma sintering (SPS) and subsequently hot extrusion. This special interface, accompanied by small grain size, the uniform dispersion and the integrity of the CNTs, can significantly improve the mechanical properties of the Al/CNTs composite. Additionally, the effect of initial Al matrix powder size on the mechanical properties of the composites were investigated. The results indicate that the size of the initial matrix powder affected the dispersion of the CNTs and the interface between the CNTs and Al matrix, and thus influenced the mechanical properties. This work provides a new designation for the high performance of metal based composites with excellent interfacial bonding strength. (C) 2017 Elsevier Ltd. All rights reserved.