Laser sintered graphene nickel nanocomposites

Zengrong Hu, Guoquan Tong, Dong Lin, Qiong Nian, Jiayi Shao, Yaowu Hu, Majib Saei, Shengyu Jin, Gary J. Cheng

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

Laser sintered graphene nickel (Gr-Ni) nanocomposites have been successfully fabricated, with uniform dispersion of graphene nanoplatelets in the nickel matrix. Microstructures and composition of the nanocomposites were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD) and Raman spectroscopy. It was demonstrated by EDS maps, XRD patterns and Raman spectrum that graphene nanoplatelets were uniformly integrated in the nickel matrix. TEM images further proved the structure and uniform distribution of graphene in the nanocomposites after laser sintering. HRTEM images revealed the interface between nickel and graphene. High density of dislocation was discovered around the graphene. The strength and elastic modulus of the nanocomposites are significantly improved, as characterized by nanoindentation tests. The hardness tests show that the laser sintered Gr-Ni nanocomposites are around 3-fold higher than that of laser sintered nickel. The strengthening mechanism was also studied theoretically.

Original languageEnglish (US)
Pages (from-to)143-150
Number of pages8
JournalJournal of Materials Processing Technology
Volume231
DOIs
StatePublished - May 2016
Externally publishedYes

Keywords

  • Graphene
  • Laser sintering
  • Metal nanocomposites
  • Nickel

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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  • Cite this

    Hu, Z., Tong, G., Lin, D., Nian, Q., Shao, J., Hu, Y., Saei, M., Jin, S., & Cheng, G. J. (2016). Laser sintered graphene nickel nanocomposites. Journal of Materials Processing Technology, 231, 143-150. https://doi.org/10.1016/j.jmatprotec.2015.12.022