Effect of Nanocrystalline Nickel Powder and Co, Mo, Ta, and Al Additions on Isothermal Oxidation Behavior of Ni–17Cr Alloy

Bukola Joseph Babalola, Mxolisi Brendon Shongwe, Nthabiseng Maledi, Samson Olaitan Jeje, Olusoji Oluremi Ayodele, Azeez Rominiyi Lawan, Peter Apata Olubambi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this paper, the effect of nanocrystalline nickel powder developed via high-energy ball milling process and the addition of Co, Mo, Ta, and Al on the isothermal oxidation behavior of Ni–17Cr binary alloy developed by spark plasma sintering system was investigated. The oxidation behavior of the sintered alloys was studied in air at 1100 °C for exposure period up to 312 h. The oxidation rate and kinetics show that the addition of Al and nanocrystalline nickel enhances the oxidation resistance of the binary alloy followed by Mo, Co, and Ta in their reducing order. The formation of the chromia scale was common to all the sintered alloys investigated as confirmed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy analysis.

Original languageEnglish
Pages (from-to)75-85
Number of pages11
JournalMetallography, Microstructure, and Analysis
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Feb 2020

Keywords

  • High-energy ball milling
  • Nanocrystalline nickel powder
  • Nickel-based alloys
  • Oxidation
  • Spark plasma sintering

ASJC Scopus subject areas

  • Metals and Alloys

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