Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion

doi:10.1007/s11431-020-1715-8

CORC > 金属研究所 > 中国科学院金属研究所

	Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion
	Ma, Kai 1,2; Liu, ZhenYu 1; Zhang, XingXing 1; Xiao, BoLu 1; Ma, ZongYi 1
刊名	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
	2021-03-23
页码	11
关键词	carbon nanotube aluminum matrix composite hot extrusion bimodal mechanical property
ISSN号	1674-7321
DOI	10.1007/s11431-020-1715-8
通讯作者	Liu, ZhenYu(zyliu@imr.ac.cn)
英文摘要	Bimodal carbon nanotube reinforced 7055Al (CNT/7055Al) composites containing coarse grain bands and ultra-fine grain zones were fabricated by high energy ball milling, vacuum hot pressing followed by hot extrusion. The effect of extrusion temperature varied from 320 degrees C to 420 degrees C on the microstructure evolution and tensile properties were investigated. Microstructure observation indicates that the elongated coarse grain bands aligned along the extrusion direction after extrusion. The width of the coarse grain bands increased, and the length of the coarse grain bands increased firstly and then decreased with the increase of extrusion temperature. The grain size of the ultra-fine grain zones changed little after hot extrusion, but the ultra-fine grains coarsened after subsequent heat treatment, especially for the composite extruded at low temperature of 320 degrees C. By observing the CNT distribution, it was found that the higher temperature extrusion was beneficial to the CNT orientation along the extrusion direction. Furthermore, a precipitate free zone formed at the boundary between the coarse grain band and the ultra-fine grain zone as the composite extruded at high temperature of 420 degrees C. As the result of the comprehensive influence of the above microstructure, the tensile strength of the composite extruded at moderate temperature of 370 degrees C reached the highest of 826 MPa.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC015] ; Project of Manned Spaceflight[040103] ; National Natural Science Foundation of China[51931009] ; National Natural Science Foundation of China[51871214] ; National Natural Science Foundation of China[51871215] ; Youth Innovation Promotion Association CAS[2020197]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000632777900001
资助机构	Key Research Program of Frontier Sciences, CAS ; Project of Manned Spaceflight ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/162016]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, ZhenYu
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ma, Kai,Liu, ZhenYu,Zhang, XingXing,et al. Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2021:11.
APA	Ma, Kai,Liu, ZhenYu,Zhang, XingXing,Xiao, BoLu,&Ma, ZongYi.(2021).Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,11.
MLA	Ma, Kai,et al."Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2021):11.