Development of High-Entropy Alloys as Bond Coats: A Thermodynamic and Kinetic Perspective

Ameey Anupam1,2, K. Guruvidyathri3, Mayur Vaidya4
1Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, India
2Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, India
3School of Engineering Sciences and Technology, University of Hyderabad, Hyderabad, India
4Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology – Hyderabad, Sangareddy, India

Tóm tắt

The past two decades have seen prolific research on high-entropy alloys (HEAs) highlighting several multi-element compositions with exciting properties for structural and functional applications. However, the translation of research to technology is still underway and requires sustainable cognitive efforts to realise HEAs as products. The most promising applications where HEAs are likely to be employed in real-time components are coatings, the major advantage being that the replacement of conventional bulk material is not necessary. Bond coats are one such area where several HEA compositions have been explored to assess their performance with respect to the conventional alloys. The present paper brings forward the key features of HEAs investigated for bond coat applications, with particular focus on the thermodynamic and kinetic aspects, such as phase formation, interdiffusion and oxidation. The challenges for accelerated design of HEA for BCs and the possible way forward have also been discussed.

Tài liệu tham khảo

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