Effect of Y2O3 addition on the oxidation resistance of TiN/Ni composites applied for intermediate temperature solid oxide fuel cell interconnects

Duan, Hang; Liu, Yan; Zhou, Hui; Huang, Zhengren

doi:10.1016/j.matchar.2020.110461

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…To improve the oxidation performance of alloys, reactive elements (REs), such as Y and Zr, were usually added into the alloys. [15][16][17] Previous researches have already shown that the oxidation resistance of alloys is significantly affected by RE effects. [6,18,19] There are extensive possible effects when RE ions diffuse to alumina grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Effects of Zr Distribution on High‐Temperature Oxidation Resistance of a FeCrAlZr Alloy

Cao

Jiang

et al. 2022

steel research int.

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Two FeCrAlZr alloys are fabricated by twin‐roll strip casting (TRSC) and ingot casting (IC), and different Zr distributions are formed. After cyclic oxidation tests at 1200 °C for 200 h in air, it is found that the scale spallation resistance in the FeCrAlZr alloy is improved by homogenizing the Zr distribution by TRSC. To understand the improvement in oxidation resistance, the composition and microstructure of the thermally grown scales are investigated. During oxidation, Zr diffuses toward the scale and forms ZrO2 particles in the scale and at the surface of the oxide scale. Meanwhile, the outward diffusion of Zr inhibits the formation of interfacial voids and S segregation regardless of Zr distribution. However, the TRSC sample with a more uniform Zr distribution can form the high‐density oxide penetrations, keying the scale to the matrix and improving scale adhesion. The Zr fluxes toward the scales are calculated to explain the difference in the distribution of oxide penetrations in the TRSC and IC samples during oxidation.

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