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Synergistic effect of carbon nanotube and graphene nanoplatelet addition on microstructure and mechanical properties of AZ31 prepared using hot-pressing sintering

Published online by Cambridge University Press:  13 November 2018

Liqun Wu Open the ORCID record for Liqun Wu [Opens in a new window] ,
Ruizhi Wu ,
Jinghuai Zhang ,
Legan Hou  and
Milin Zhang
Liqun Wu*
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; and College of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Ruizhi Wu*
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; and College of Science, Heihe University, Heihe 164300, China
Jinghuai Zhang
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
Legan Hou
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
Milin Zhang
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; and College of Science, Heihe University, Heihe 164300, China
*
a)Address all correspondence to this author. e-mail: rzwu@hrbeu.edu.cn, ruizhiwu2006@yahoo.com
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Abstract

Magnesium alloy (AZ31) reinforced with carbon nanotubes (CNTs) and grapheme nanoplatelets (GNPs) were fabricated with the method of hot-pressing sintering and hot extrusion processes. GNPs and CNTs were predispersed with Al and Zn powders by ball milling used as precursor for sintering, which effectively guaranteed the integrity and dispersion of them. The microstructure and mechanical properties of the composites (denoted as Mg–3 wt% Al–1 wt% Zn–1 wt% (xCNTs + yGNPs)(x:y = 1:1, 1:2, 1:3) were investigated. The results show that the CNTs and GNPs are uniformly distributed in the matrix and closely combined with the matrix in nanoscale. Among the tested composites, Mg–3 wt% Al–1 wt% Zn–1 wt% (xCNTs + yGNPs)(x:y = 1:2) exhibits the most favorable mechanical properties, and the yield strength, tensile and compressed strength, and elongation of composites are substantially improved by the addition of 0.33 wt% CNTs and 0.67 wt% GNPs. Novel strengthening mechanisms such as three-dimensional reinforced structure formed by CNTs and GNPs are found for the remarkable improvement in mechanical properties.

Keywords

AZ31CNTsGNPshot-press sinteringmechanical properties
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 24 , 28 December 2018 , pp. 4261 - 4269
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

*

A previous error in this article has been corrected, please see doi: 10.1557/jmr.2018.488.

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