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Modelling of carbon nanotube dispersion and strengthening mechanisms in Al matrix composites prepared by high energy ball milling-powder metallurgy method
Liu, Z. Y.; Xiao, B. L.; Wang, W. G.; Ma, Z. Y.; Ma, ZY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-03-01
发表期刊COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
ISSN1359-835X
卷号94页码:189-198
摘要Carbon nanotube (CNT) reinforced Al-5Mg composites were prepared by combining ball milling, hot pressing and subsequent hot extrusion. CNT distribution during milling and strengthening mechanism of the composites were investigated. A model based on the ratio of minimum necessary time for uniformly dispersing CNT to flattening time of composite powders was proposed to analyze the effect of milling rotation rate on CNT distribution, and it indicated that both low and high milling rotation rates are not beneficial to CNT distribution, due to small deformation ratio and severe cold-welding, respectively. Under a milling rotation rate of 400 rpm, CNTs could be uniformly dispersed after 8 h of milling and aligned along the extruding direction after extrusion. Elastic moduli and strengths of the composites were significantly increased. Load transfer, grain refinement, and mismatch dislocation mechanisms were determined to contribute to the strength increase of CNT/Al-5Mg composites. (C) 2016 Elsevier Ltd. All rights reserved.; Carbon nanotube (CNT) reinforced Al-5Mg composites were prepared by combining ball milling, hot pressing and subsequent hot extrusion. CNT distribution during milling and strengthening mechanism of the composites were investigated. A model based on the ratio of minimum necessary time for uniformly dispersing CNT to flattening time of composite powders was proposed to analyze the effect of milling rotation rate on CNT distribution, and it indicated that both low and high milling rotation rates are not beneficial to CNT distribution, due to small deformation ratio and severe cold-welding, respectively. Under a milling rotation rate of 400 rpm, CNTs could be uniformly dispersed after 8 h of milling and aligned along the extruding direction after extrusion. Elastic moduli and strengths of the composites were significantly increased. Load transfer, grain refinement, and mismatch dislocation mechanisms were determined to contribute to the strength increase of CNT/Al-5Mg composites. (C) 2016 Elsevier Ltd. All rights reserved.
部门归属[liu, z. y. ; xiao, b. l. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [wang, w. g.] liaoning shihua univ, 1 dandong rd, fushun 113001, peoples r china
关键词A. metA.-mA.rix Composites (Mmcs) A. cA.bon nA.otube B. Strength C. analytiC.l Modelling
学科领域Engineering, Manufacturing ; Materials Science, Composites
资助者National Basic Research Program of China [2012CB619600]; CAS-SAFEA International Partnership Program for Creative Research Teams; National Natural Science Foundation of China [51501189]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78258
专题中国科学院金属研究所
通讯作者Ma, ZY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Liu, Z. Y.,Xiao, B. L.,Wang, W. G.,et al. Modelling of carbon nanotube dispersion and strengthening mechanisms in Al matrix composites prepared by high energy ball milling-powder metallurgy method[J]. COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING,2017,94:189-198.
APA Liu, Z. Y.,Xiao, B. L.,Wang, W. G.,Ma, Z. Y.,&Ma, ZY .(2017).Modelling of carbon nanotube dispersion and strengthening mechanisms in Al matrix composites prepared by high energy ball milling-powder metallurgy method.COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING,94,189-198.
MLA Liu, Z. Y.,et al."Modelling of carbon nanotube dispersion and strengthening mechanisms in Al matrix composites prepared by high energy ball milling-powder metallurgy method".COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING 94(2017):189-198.
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