A Novel Al1.5CoCrFeNi2 High Entropy Alloy for Bond Coat Applications

A new Al 1.5 CoCrFeNi 2 high entropy alloy is assessed for bond coat applications using cyclic oxidation at 1050 °C for 50 h. The alloy exhibits significantly lower and constant weight gain of 0.36 mg/cm 2 throughout the test duration, and the oxidation resistance is comparable to commercially used...

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Bibliographic Details
Published inTransactions of the Indian Institute of Metals Vol. 77; no. 1; pp. 185 - 190
Main Authors Sudeep Kumar, T., Verma, Ayush, Shanmugasundaram, T.
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 2024
Springer Nature B.V
Subjects
Aluminum oxide
Chemistry and Materials Science
Compressive properties
Corrosion and Coatings
High entropy alloys
Materials Science
Metallic Materials
Original Article
Oxidation resistance
Residual stress
Tribology
High entropy alloys
oxide
Cyclic oxidation
XPS
Al
Raman spectroscopy
O
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Summary:A new Al 1.5 CoCrFeNi 2 high entropy alloy is assessed for bond coat applications using cyclic oxidation at 1050 °C for 50 h. The alloy exhibits significantly lower and constant weight gain of 0.36 mg/cm 2 throughout the test duration, and the oxidation resistance is comparable to commercially used MCrAlY bond coat materials. The better oxidation resistance of the alloy is ascribed to the presence of sufficient Al content in it and the formation of stable α-Al 2 O 3 oxides which prevents further oxidation by suppressing the ingress of oxygen into the sample. The magnitude of compressive residual stress in alumina ranges from − 450 to − 1800 MPa which is less than that of commercial bond coat materials.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-023-03074-1