Work

Effect of Ru on the oxidation behavior of a fourth-generation single crystal superalloy at 900 °C

Year: 2026

Type: article

Abstract: This paper investigates the influence of ruthenium (Ru) on the oxidation behavior of a fourth-generation nickel-based single crystal superalloy at 900 oC. By comparing oxidation kinetics curves, surface and cross-sectional oxidation products, and microstructures of alloys with and without Ru, it was found that the addition of Ru reduced the oxidation resistance of the alloy at 900 oC. Ru delays the formation of a continuous Al2O3 layer, causing the initial oxidation stage to be dominated by a NiO layer, with the Al2O3 layer becoming prominent only in the later stages. Additionally, the formation of volatile Ru-containing oxides does not significantly degrade the oxidation performance of the alloy, as this depends on the formation of the continuous Al2O3 layer.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2026.02.052

Authors: Zhicheng Ge, Guang Xie, Jian Zhang

Institutions: Chinese Academy of Sciences, Institute of Metal Research

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, Chinese Academy of Sciences, National Science and Technology Major Project, National Key Research and Development Program of China