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Physics of Metals and Metallography

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29.12.2023 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Effect of Platinum Addition on Microstructure and Oxidation Behavior of Ni₃Al-Base Alloys

verfasst von: Y. R. Cao, J. J. Shi, G. Y. Zhou, Z. X. Zhang, X. L. Zou, X. G. Lu, G. H. Cao

Erschienen in: Physics of Metals and Metallography | Ausgabe 13/2023

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Abstract

In order to study the effect of Pt on bond coat in thermal barrier coating, the corresponding Pt modified Ni₃Al-base alloys were fabricated using arc melting. The microstructure and the oxidation behavior of the Ni–25Al–xPt (x = 0, 10, 20 and 30 at %) alloys at 1100°C were characterized using X-ray diffraction, scanning and transmission electron microscopy. The experimental results showed that the Ni–25Al–xPt alloys kept a single γ′-Ni₃Al phase structure when Pt content up to 20 at %, while Ni–25Al–30Pt alloy consisted of two-phase structures of γ-Ni and γ′-Ni₃Al, which may be caused by the phase deviation resulting from the volatilization loss of Al. Isothermal oxidation test indicated that the addition of Pt in Ni₃Al-base alloys promoted Al₂O₃ scale formation, affected the oxidation surface morphology, reduced oxidation weight gain and the thickness of the oxide layer.

Vorheriger Artikel Comparative Study of Structural and Opto-Electric Features of Environment Friendly AlSb Screen Printed and Brush Plated Films

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Titel: Effect of Platinum Addition on Microstructure and Oxidation Behavior of Ni3Al-Base Alloys
verfasst von: Y. R. Cao
J. J. Shi
G. Y. Zhou
Z. X. Zhang
X. L. Zou
X. G. Lu
G. H. Cao
Publikationsdatum: 29.12.2023
Verlag: Pleiades Publishing
Erschienen in: Physics of Metals and Metallography / Ausgabe 13/2023
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI: https://doi.org/10.1134/S0031918X23700151

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