The influence of Y2O3 concentration on the microstructure and oxidation performance of FeCrAl-ODS alloy manufactured by selective laser melting

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-22 DOI:10.1016/j.jallcom.2025.179949

Shenghua Zhang, Fudong Li, Yu Xie, Zhonghua Li, Yu Wang, Shengtong He, Bin Liu

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引用次数: 0

Abstract

This study investigates the influence of Y₂O₃ concentration on the microstructure and oxidation performance of selective laser melted (SLM-ed) FeCrAl-ODS alloys. Three FeCrAl-ODS alloys with varying Y₂O₃ contents were designed, and their microstructures were characterized. Oxidation experiments were conducted at 1000 °C in air. The results indicate that FeCrAl0.7Y exhibited fine grain size and high interior strain due to the nucleation-promoting and grain boundary-pinning effects of Y₂O₃ particles. After 225 hours of oxidation, FeCrAl0.1Y demonstrated the lowest oxidation mass gain and excellent oxide scale adhesion. Dense and compact Al₂O₃ scales formed on the surfaces of SLM-ed FeCrAl alloys with Y₂O₃ additions. Y enrichment at the Al₂O₃ oxide grain boundaries inhibited outward cation diffusion, shifting the Al₂O₃ scale growth mechanism from a bidirectional mechanism driven by metallic element diffusion and inward oxygen diffusion to a columnar grain growth mechanism dominated by inward oxygen diffusion. This change impeded the growth rate of oxide scale. However, excessive Y accelerated oxide film development. The presence of Y improved the adhesion of the oxide film on the SLM-ed FeCrAl-ODS alloys.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.