Oxidation Characteristics of Porous Nickel Low-Chromium Binary Alloys in Air at 1273K for 100 h

Lamiaa Z. Mohamed; Wafaa A. Ghanem; Omayma A. El Kady; Mohamed. M. Lotfy; Hafiz A. Ahmed; Fawzi A. Elrefaie

doi:10.4028/www.scientific.net/KEM.786.37

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 786Oxidation Characteristics of Porous Nickel...

Oxidation Characteristics of Porous Nickel Low-Chromium Binary Alloys in Air at 1273K for 100 h

Abstract:

The oxidation behavior of porous nickel low-chromium alloys containing up to 1 wt%Cr oxidized in air at 1273K for 100 h was investigated. Porous-duplex scale was formed on the 1 wt%Cr pellets while single oxide layers were obtained on the 0.25 and 0.5 wt%Cr pellets. Cavities were formed underneath the NiO scales and also between both layers formed on the oxidized 1 wt%Cr pellets. Accumulation of NiCr₂O₄was noticed at the oxide/ metal interface. The growth mechanism of the scales was explained on the basis of molecular oxygen inward migration.

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Periodical:

Key Engineering Materials (Volume 786)

Pages:

37-43

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.786.37

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Online since:

October 2018

Authors:

Lamiaa Z. Mohamed*, Wafaa A. Ghanem, Omayma A. El Kady, Mohamed. M. Lotfy, Hafiz A. Ahmed, Fawzi A. Elrefaie

Keywords:

High Temperature Oxidation, Linear Kinetics, Molecular Oxygen Inward Migration, Porous Nickel Low-Chromium Alloys, Porous Scales Microstructure

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