Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 728, Issue -, Pages 282-288Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.09.009
Keywords
Nanocomposites; Metal-matrix composites; Mechanical properties; Carbon nanotubes
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Funding
- National Natural Science Foundation of China [51472203, 51521061, 51575447, 51275417]
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A novel process for preparing carbon nanotubes (CNTs) reinforced magnesium nanocomposites were developed, which combined friction stir processing (FSP) and ultrasonic assisted extrusion. A very good dispersion of CNTs in AZ91D alloy could be observed. It was demonstrated that the strength of Mg nanocomposites was remarkably enhanced. This was contributed to dislocation strengthening mechanism and stress transfer mechanism, not concerned with the grain refinement. Moreover, the composites maintained good ductility. The interfaces between CNTs and Mg matrix were well bonded, and the interfacial reaction product formation of Al2MgC2 was confirmed. A few edge dislocations were observed at CNTs-matrix boundaries by adding carbon nanotubes. (C) 2017 Elsevier B.V. All rights reserved.
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