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

25 Citations (Scopus)

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 1 2016
Externally publishedYes

Fingerprint

Graphite
Graphene
Nanocomposites
Nickel
Laser
Lasers
Transmission Electron Microscopy
X-ray Diffraction
Spectrometer
Spectrometers
Transmission electron microscopy
Nanoindentation
X ray diffraction
Raman Spectra
Sintering
Raman Spectroscopy
Strengthening (metal)
Elastic Modulus
Strengthening
Scanning Electron Microscopy

Keywords

  • Graphene
  • Laser sintering
  • Metal nanocomposites
  • Nickel

ASJC Scopus subject areas

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

Cite this

Laser sintered graphene nickel nanocomposites. / Hu, Zengrong; Tong, Guoquan; Lin, Dong; Nian, Qiong; Shao, Jiayi; Hu, Yaowu; Saei, Majib; Jin, Shengyu; Cheng, Gary J.

In: Journal of Materials Processing Technology, Vol. 231, 01.05.2016, p. 143-150.

Research output: Contribution to journalArticle

Hu, Z, Tong, G, Lin, D, Nian, Q, Shao, J, Hu, Y, Saei, M, Jin, S & Cheng, GJ 2016, 'Laser sintered graphene nickel nanocomposites', Journal of Materials Processing Technology, vol. 231, pp. 143-150. https://doi.org/10.1016/j.jmatprotec.2015.12.022
Hu, Zengrong ; Tong, Guoquan ; Lin, Dong ; Nian, Qiong ; Shao, Jiayi ; Hu, Yaowu ; Saei, Majib ; Jin, Shengyu ; Cheng, Gary J. / Laser sintered graphene nickel nanocomposites. In: Journal of Materials Processing Technology. 2016 ; Vol. 231. pp. 143-150.
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