In-situ reaction-generation self-healing superior antioxidation layer induced by Al-Y sol-gel film on the AISI304 steel

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hongtao Chen, Hao Wu, Enhao Wang, Sicong Zhao, Yicheng Feng, Erjun Guo
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Abstract

In this study, an Al-Y sol-gel film is prepared on the AISI304 steel and its effect on the high temperature oxidation resistance is evaluated by the cycle oxidation at 900 ℃ in the air. The resulting intact oxide layer, composed of (Al, Cr)2O3 and MnCr2O4 phases, effectively slowing down the oxidation rates at 900 ℃. The general cracks in the sol-gel film during the oxidation process are found to be self-healed by a growing spinel MnCr2O4 phase from the substrate, attributed to its low Gibbs free energy and the sufficient Cr source from the adjacent substrate. Furthermore, the oxide layer originates from the interaction between sol-gel film and the substrate which enhances the binding between the oxide layer and the substrate. Thus, it could be confirmed that a self-healing superior antioxidation layer is generated on the surface of AISI304 steel through an in-situ reaction induced by the Al-Y sol-gel film during high-temperature oxidation procedure.

Abstract Image

Al-Y 溶胶凝胶膜在 AISI304 钢上诱导原位反应生成自修复高级抗氧化层
本研究在 AISI304 钢上制备了 Al-Y 溶胶凝胶膜,并通过在空气中进行 900 ℃ 循环氧化评估了其对高温抗氧化性的影响。生成的完整氧化层由(Al, Cr)2O3 和 MnCr2O4 相组成,可有效减缓 900 ℃ 下的氧化速率。在氧化过程中,溶胶凝胶膜上出现的一般裂纹可通过基底上生长的尖晶石 MnCr2O4 相进行自修复,这归功于其较低的吉布斯自由能和邻近基底上充足的铬源。此外,氧化层源于溶胶-凝胶薄膜与基底之间的相互作用,这种相互作用增强了氧化层与基底之间的结合力。因此可以确认,在高温氧化过程中,Al-Y 溶胶凝胶膜诱导的原位反应在 AISI304 钢表面生成了自愈性极佳的抗氧化层。
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来源期刊
Materialia
Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
6.40
自引率
2.90%
发文量
345
审稿时长
36 days
期刊介绍: Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).
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