Influence of spark plasma sintering temperature on the densification and micro-hardness behaviour of Ni-Cr-Al alloy

B. J. Babalola, M. B. Shongwe, S. O. Jeje, A. L. Rominiyi, O. O. Ayodele, P. A. Olubambi

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

Sintering temperature is essential towards attaining desired densification and formation of phases which in turn influences the microstructure and properties of a material. In this study, the densification and microhardness behaviour of Ni-Cr-Al alloy prepared by spark plasma sintering (SPS) at different sintering temperatures were investigated. After sintering operation, the density, hardness, phase analysis, and microstructural evolution were investigated using the Archimede's principle, hardness tester, X-ray diffraction (XRD), and scanning electron microscopy (SEM) respectively. The nickel based alloy was sintered at temperatures of 600, 750, 950 and 1100 °C. The results indicated that the densification, microstructure, and hardness values were influenced by changes in the sintering temperature. The relative density increased from 73.89 % at 600 °C to 99.89 % at 1100 °C, while the hardness value was enhanced from 131.9 ± 2.8 HV to 404 ± 1.2 HV respectively.

Original languageEnglish
Article number012032
JournalIOP Conference Series: Materials Science and Engineering
Volume655
Issue number1
DOIs
Publication statusPublished - 8 Nov 2019
EventConference of the South African Advanced Materials Initiative 2019, CoSAAMI 2019 - Vanderbijlpark, South Africa
Duration: 22 Oct 201925 Oct 2019

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering

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