Combination of hot extrusion and spark plasma sintering for producing carbon nanotube reinforced aluminum matrix composites
Combination of hot extrusion and spark plasma sintering for producing carbon nanotube reinforced aluminum matrix composites
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DOI：
10.1016/j.carbon.2008.10.041
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发表时间：
2009-03-01
期刊：
影响因子：
10.9
通讯作者：
Kawasaki, Akira
中科院分区：
文献类型：
--
作者：
Kwon, Hansang;Estili, Mehdi;Kawasaki, Akira
采用几种先进的粉末工艺，制备了具有纳米级分散和规则取向的碳纳米管/铝纳米管复合材料。通过纳米级分散方法将碳纳米管很好地分散到Al颗粒上。采用火花等离子烧结和热挤压法制备了高密度碳纳米管复合材料。光学显微镜、场发射扫描电子显微镜和高分辨率透射电子显微镜的微观结构观察证实，烧结的Al/CNT致密挤压体材料具有良好的定向碳纳米管分散性。拉曼光谱分析表明，加工过程对碳纳米管的损伤很小。结果，由于碳纳米管的增强，复合材料的抗拉强度是纯铝的三倍。(C) 2008 Elsevier Ltd版权所有。
Aluminum (Al)/carbon nanotube (CNT) composites with nanoscale dispersion and regular orientation of the CNTs were fabricated by a combination of some advanced powder processes. The CNTs were well dispersed onto the Al particles by a nanoscale dispersion method. Moreover, the highly densified CNT composites were prepared by spark plasma sintering and subsequent hot extrusion. Microstructural observations by optical, field-emission scanning electron, and high-resolution transmission electron microscopies confirmed that the sintered Al/CNT compact and extruded bulk material had a good dispersion of oriented CNTs. Raman spectroscopy showed that the processing did little damage to the CNTs. As a result, the composites exhibited tensile strengths that were thrice larger than pure aluminum because of the CNT reinforcement. (C) 2008 Elsevier Ltd. All rights reserved.