Influence of nanocrystalline nickel powder on oxidation resistance of spark plasma sintered Ni-17Cr6.5Co1.2Mo6Al4W7.6Ta alloy

Bukola Joseph Babalola; Nthabiseng Maledi; Mxolisi Brendon Shongwe; Michael Oluwatosin Bodunrin; Babatunde Abiodun Obadele; Peter Apata Olubambi

Journal of King Saud University: Engineering Sciences (Mar 2020)

Influence of nanocrystalline nickel powder on oxidation resistance of spark plasma sintered Ni-17Cr6.5Co1.2Mo6Al4W7.6Ta alloy

Bukola Joseph Babalola,
Nthabiseng Maledi,
Mxolisi Brendon Shongwe,
Michael Oluwatosin Bodunrin,
Babatunde Abiodun Obadele,
Peter Apata Olubambi

Affiliations

Bukola Joseph Babalola: Department of Chemical, Metallurgical and Materials Engineering, Faculty of Engineering and Built Environment, Tshwane University of Technology, Pretoria, South Africa; Corresponding author.
Nthabiseng Maledi: School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa
Mxolisi Brendon Shongwe: Department of Chemical, Metallurgical and Materials Engineering, Faculty of Engineering and Built Environment, Tshwane University of Technology, Pretoria, South Africa
Michael Oluwatosin Bodunrin: School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa
Babatunde Abiodun Obadele: Department of Chemical, Materials and Metallurgical Engineering, Botswana International University of Science and Technology, Palapye, Botswana; Center for NanoEngineering and Tribocorrosion, School of Mining, Metallurgical and Chemical Engineering, University of Johannesburg, Doornfontein Campus, 2028 Johannesburg, South Africa
Peter Apata Olubambi: Center for NanoEngineering and Tribocorrosion, School of Mining, Metallurgical and Chemical Engineering, University of Johannesburg, Doornfontein Campus, 2028 Johannesburg, South Africa

Journal volume & issue: Vol. 32, no. 3
pp. 198 – 204

Abstract

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An investigation was carried out to evaluate the isothermal oxidation behavior of nickel based superalloys at 1100 °C for 120 h. The alloys which were microstructured and nanostructured were developed by spark plasma sintering system. The oxidation test was carried out at a temperature of 1100 °C in air at different exposure time up to 120 h. The nanostructured nickel based alloy possessed better oxidation resistance with the formation of continuous adherent alumina, chromia scales, and spinel on the alloy surface and with no significant internal oxides. The oxidation rate of NiO was observed to be lower in the nanostructured nickel superalloy due to low diffusion rate of Nickel. The oxidation kinetics followed a parabolic oxidation law. Keywords: Nickel based superalloy, Nanostructured, Spark plasma sintering, Isothermal oxidation, Mechanical milling

Published in Journal of King Saud University: Engineering Sciences

ISSN: 1018-3639 (Print)
Publisher: Elsevier
Country of publisher: Saudi Arabia
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://link.springer.com/journal/44444

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