期刊
MATERIALS & DESIGN
卷 45, 期 -, 页码 343-348出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2012.08.036
关键词
Metal matrix composites; Multi-walled carbon nanotubes; Friction stir processing
资金
- National Natural Science Foundation of China (NSFC) [50875119, 51201087, 51265043]
- Science Foundation of Jiangxi Province, China [2010GZS0175]
- Foundation of the Key Laboratory of Nondestructive Testing (Nanchang Hangkong University)
- Ministry of Education [ZD200629005]
- Foundation of Nanchang Hangkong University [EA201203072]
Aluminum matrix composites reinforced by different contents of multi-walled carbon nanotubes (MWCNTs) were fabricated by friction stir processing (FSP). The microstructure of nano-composites and the interface between aluminum matrix and MWCNTs were examined using optical microscopy (OM) and transmission electron microscopy (TEM). It was indicated that MWCNTs were well dispersed in the aluminum matrix throughout the FSP. Tensile tests and microhardness measurement showed that, with the increase of MWCNT content, the tensile strength and microhardness of MWCNTs/Al composites gradually increased, but on the contrary, the elongation decreased. The maximum ultimate tensile strength reached up to 190.2 MPa when 6 vol.% MWCNTs were added, and this value was two times more of that of aluminum matrix. Appearances and fracture surface micrographs of failed composite samples indicated that the composites become more and more brittle with the increase of the MWCNT content. (C) 2012 Elsevier Ltd. All rights reserved.
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