Work

Corrosion and diffusion barrier behavior of NiAlY/AlCrTaTiZr coating in dry CO2 atmosphere at 650 °C: Experimental study and first-principles calculation

Year: 2025

Type: article

Abstract: In this work, NiAlY coatings with and without AlCrTaTiZr high entropy alloy diffusion barrier were deposited on Fe–Cr alloy by magnetron sputtering, and their corrosion and interdiffusion behavior are investigated systematically at 650 °C in dry CO 2 gas. The results show that the corrosion rate constant and the thickness of the interdiffusion zone of composite coating are both smaller than those of NiAlY coating after 300 h. Moreover, no harmful brittle intermetallic FeAl 3 precipitates in composite coating, and internal oxidation phenomenon can not occur. Based on first-principles calculations, it is suggested that the HEA layer of the composite coating effectively slows down the diffusion of Al and Ni atoms in the HEA phase and inhibits the interface diffusion of HEA/Fe. The addition of AlCrTaTiZr HEA enhances the high-temperature anticorrosion property of the NiAlY coating.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.10.237

Authors: Yuanmi Zhang, Zheng Chen, Fangfang Wang, Qingyan Hou, Chungen Zhou

Institutions: Beihang University, Zhengzhou University of Aeronautics, Beijing Academy of Science and Technology

Language: English

Topic: High-Temperature Coating Behaviors

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640

Funders: National Natural Science Foundation of China, State Key Laboratory for Advanced Metals and Materials