Interface design of graphene/copper composites by matrix alloying with titanium
Interface design of graphene/copper composites by matrix alloying with titanium
复制标题
钛基体合金化石墨烯/铜复合材料的界面设计
DOI：
10.1016/j.matdes.2018.02.038
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发表时间：
2018-04-15
影响因子：
8.4
通讯作者：
Zhang, Hu
中科院分区：
文献类型：
--
作者：
Chu, Ke;Wang, Fan;Zhang, Hu
获得紧密和牢固的界面对于提高石墨烯/金属复合材料的载荷传递能力和强度至关重要。在此，我们报告了一种界面设计策略，通过基体合金化与Ti原位界面碳化物的形成还原氧化石墨烯（RGO）/CuTi复合材料。结果表明，Ti 8 C5纳米层和Ti 8 C5纳米颗粒均原位形成于RGO/CuTi复合材料的局部界面，在增强RGO/CuTi基体界面结合中起到“铆钉”作用。在1.5体积%的RGO负载下，与没有合金化的RGO/Cu复合材料相比，RGO/CuTi复合材料表现出更高的拉伸强度增强（57.7%对37.5%）和更低的热膨胀系数降低（-10.9%对-3.9%）。所形成的界面Ti 8 C5纳米层和Ti 8 C5纳米颗粒被认为分别来源于RGO表面的无定形碳纳米层和无定形碳纳米颗粒。该研究为先进石墨烯/铜复合材料的界面设计和碳化物形成机制提供了新的见解，具有增强的机械/热性能。(C)2018爱思唯尔有限公司版权所有
The attainment of intimate and strong interface is critical for promoting the load transfer ability and strength of graphene/metal composites. Herein, we reported an interface design strategy by matrix-alloying with Ti for in-situ interfacial carbide formation in reduced graphene oxide (RGO)/CuTi composites. It was demonstrated that both Ti8C5 nanolayers and Ti8C5 nanoparticles were in-situ formed at the local interface of RGO/CuTi composite, which played a "rivet" role in enhancing the interfacial bonding between the RGO and CuTi matrix. At 1.5 vol% RGO loading, compared to RGO/Cu composite without alloying, the RGO/CuTi composite exhibited a higher enhancement in tensile strength (57.7% vs. 37.5%) and a lower reduction in coefficient of thermal expansion (-10.9% vs. -3.9%). The formed interfacial Ti8C5 nanolayers and Ti8C5 nanoparticles were proposed to originate from the amorphous carbon nanolayers and amorphous carbon nanoparticles on the surface of RGO, respectively. This study provides new insights into the interface design and carbide formation mechanism of advanced graphene/Cu composites with enhanced mechanical/thermal properties. (C) 2018 Elsevier Ltd. All rights reserved.