Synergistic effect of Pt and Hf on the early-stage oxidation behaviour of NiAl coating at 1000 °C

Y.F. Yang; S.X. Ren; C.M. Deng; P. Ren; P.M. Zhang; R.L. Peng; Z.B. Bao; W. Li

Corrosion Communications (Mar 2022)

Synergistic effect of Pt and Hf on the early-stage oxidation behaviour of NiAl coating at 1000 °C

Y.F. Yang,
S.X. Ren,
C.M. Deng,
P. Ren,
P.M. Zhang,
R.L. Peng,
Z.B. Bao,
W. Li

Affiliations

Y.F. Yang: Institute of Advanced Wear & Corrosion Resistant and Functional Material, Jinan University, Guangzhou 510632, China; Laboratory of Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
S.X. Ren: Institute of Advanced Wear & Corrosion Resistant and Functional Material, Jinan University, Guangzhou 510632, China
C.M. Deng: Institute of New Materials, Guangdong Academy Sciences, Guangzhou 510651, China
P. Ren: Institute of Advanced Wear & Corrosion Resistant and Functional Material, Jinan University, Guangzhou 510632, China; Laboratory of Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Corresponding author.
P.M. Zhang: Department of Management and Engineering, Linköping University, Linköping SE-58183, Sweden; Co-corresponding author.
R.L. Peng: Department of Management and Engineering, Linköping University, Linköping SE-58183, Sweden
Z.B. Bao: Laboratory of Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
W. Li: Institute of Advanced Wear & Corrosion Resistant and Functional Material, Jinan University, Guangzhou 510632, China

Journal volume & issue: Vol. 5
pp. 49 – 61

Abstract

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The initial-stage oxidation behaviours of unmodified, Pt and Pt+Hf modified NiAl coating are systematically investigated by employing the photo-stimulated luminescence spectroscopy (PSLS) and transmission electron microscopy (TEM) technique. Both Pt and Hf additions can retard the θ- to α- Al2O3 phase transformation. The oxidation rates of the modified NiAl coatings are initially higher than that of the unmodified NiAl coating due to the longer presence of θ-Al2O3. However, they decrease drastically when the oxide in the scale turns to be α-Al2O3 dominantly. The delayed phase transformation in the modified coatings results in lower residual stress within the oxide scale.

Published in Corrosion Communications

ISSN: 2667-2669 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/corrosion-communications

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