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Synthesis of CNT-reinforced AZ31 magnesium alloy composites with uniformly distributed CNTs

Publication ,  Journal Article
Han, G; Wang, Z; Liu, K; Li, S; Du, X; Du, W
Published in: Materials Science and Engineering: A
March 5, 2015

An effective two-step dispersion process for producing carbon nanotube (CNT)-reinforced magnesium alloy (CNT/AZ31) composites was developed, and the microstructure and the mechanical properties of the composite were investigated. The process includes the preparation of a CNT/Mg precursor with uniformly dispersed CNTs and the synthesis of CNT/AZ31 composites by subsequent melting and hot extrusion. An analysis showed that the CNTs uniformly disperse in the molten AZ31 without agglomeration because of the use of the CNT/Mg precursor. The structure of the CNTs was not destroyed, and good interfacial bonding existed between the CNTs and the AZ31 matrix. The tensile yield strength of the CNT/AZ31 composite was 22.7% greater than that of the monolithic AZ31 alloy without an obvious decrease in elongation and the compressive yield strength increased by 53 % with the addition of 0.05. vol. % CNTs. The reasons for the increase in strength are the decrease in grain size of the matrix due to the heterogeneous nucleation effect of the CNTs and the good interfacial bonding between the CNTs and the matrix. In addition, the compressive strength of the CNT/AZ31 composites was sensitive to the grain size, which implies that the addition of CNTs affects the compression behaviour of the CNT/AZ31 composites.

Duke Scholars

Published In

Materials Science and Engineering: A

DOI

ISSN

0921-5093

Publication Date

March 5, 2015

Volume

628

Start / End Page

350 / 357

Related Subject Headings

  • Materials
  • 4017 Mechanical engineering
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
  • 0910 Manufacturing Engineering
 

Citation

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Han, G., Wang, Z., Liu, K., Li, S., Du, X., & Du, W. (2015). Synthesis of CNT-reinforced AZ31 magnesium alloy composites with uniformly distributed CNTs. Materials Science and Engineering: A, 628, 350–357. https://doi.org/10.1016/j.msea.2015.01.039
Han, G., Z. Wang, K. Liu, S. Li, X. Du, and W. Du. “Synthesis of CNT-reinforced AZ31 magnesium alloy composites with uniformly distributed CNTs.” Materials Science and Engineering: A 628 (March 5, 2015): 350–57. https://doi.org/10.1016/j.msea.2015.01.039.
Han G, Wang Z, Liu K, Li S, Du X, Du W. Synthesis of CNT-reinforced AZ31 magnesium alloy composites with uniformly distributed CNTs. Materials Science and Engineering: A. 2015 Mar 5;628:350–7.
Han, G., et al. “Synthesis of CNT-reinforced AZ31 magnesium alloy composites with uniformly distributed CNTs.” Materials Science and Engineering: A, vol. 628, Mar. 2015, pp. 350–57. Scopus, doi:10.1016/j.msea.2015.01.039.
Han G, Wang Z, Liu K, Li S, Du X, Du W. Synthesis of CNT-reinforced AZ31 magnesium alloy composites with uniformly distributed CNTs. Materials Science and Engineering: A. 2015 Mar 5;628:350–357.
Journal cover image

Published In

Materials Science and Engineering: A

DOI

ISSN

0921-5093

Publication Date

March 5, 2015

Volume

628

Start / End Page

350 / 357

Related Subject Headings

  • Materials
  • 4017 Mechanical engineering
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
  • 0910 Manufacturing Engineering