Work

Effect of Cu addition on high-temperature oxidation behavior of 25Cr–20Ni austenitic stainless steel

Year: 2025

Type: article

Abstract: The effect of Cu addition on the air oxidation behavior of 25Cr-20Ni austenitic stainless steels was investigated at 700 °C. The steel with Cu exhibited larger weight gain and greater oxide layer thickness than the steel without Cu. The transmission Kikuchi diffraction analysis results clearly indicated that the surface oxide scales consist of three distinct oxide phase layers in both steels. The overall oxide layer sequence was consistent with thermodynamic calculations. It seems that the presence of Cu increases the outward diffusion rate of alloying elements in both matrix and oxide layers during oxidation, eventually enhancing oxidation kinetics.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.02.134

Authors: Gunjick Lee, Heechan Jung, Yoon Seok Ko, Dong-Ik Kim, Seok Su Sohn, Jae-Hyeok Shim

Institutions: Korea University, Korea Institute of Science and Technology, Sungkyunkwan University

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: Ministry of Trade, Industry and Energy, Korea Institute of Science and Technology