二氧化硅涂层与 Ti45Al8.5Nb 合金的氧化行为和界面反应

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Materials Degradation Pub Date : 2024-09-16 DOI:10.1038/s41529-024-00511-4

Liang-Liang Wu, Hao-Jie Yan, Tao Fan, Qing-Qing Sun, Lian-Kui Wu, Fa-He Cao

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引用次数: 0

摘要

在这项研究中，对 Ti45Al8.5Nb 合金进行了二氧化硅涂层电沉积，以增强其在 900 °C 下的抗氧化性。重点是二氧化硅涂层与合金基体之间的相互作用，特别是铌元素在其中的作用。SiO2/(Ti, Nb)O2/Ti5Si3 + Al2O3 三层氧化物鳞片的形成极大地抑制了氧气的向内扩散。除了界面上特征性的 Ti5Si3 + Al2O3 层外，还观察到嵌入 Ti5Si3 中的 Nb2Al 相。同时，还证实了（Ti，Nb）O2 层的存在。还研究了涂层厚度与抗氧化性之间的关系。研究发现，SiO2 涂层的厚度会影响氧化鳞片的密度和氧气的向内扩散速度。此外，由于与基底有良好的附着力，衍生出的氧化鳞片在进行循环氧化试验时表现出良好的抗剥落性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The oxidation behavior and interfacial reaction between SiO2 coating and Ti45Al8.5Nb alloy

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The oxidation behavior and interfacial reaction between SiO2 coating and Ti45Al8.5Nb alloy

In this study, SiO2 coating was electrodeposited on Ti45Al8.5Nb alloy to enhance its oxidation resistance at 900 °C. The focus was on the interaction between SiO2 coating and the alloy substrate, and specifically, the role of the Nb element in this context. The formation of a SiO2/(Ti, Nb)O2/Ti5Si3 + Al2O3 three-layer oxide scale significantly inhibits the inward diffusion of oxygen. Beyond the characteristic Ti5Si3 + Al2O3 layer at the interface, the Nb2Al phase embedded within Ti5Si3 was observed. Concurrently, the presence of a (Ti, Nb)O2 layer was confirmed. The relationship between the coating thickness and oxidation resistance was also investigated. It was found that the thickness of the SiO2 coating affects the density of the oxide scale and the inward diffusion rate of oxygen. Moreover, due to the good adhesion to the substrate, the derived oxide scale exhibited good anti-peeling performance when subjected to a cyclic oxidation test.

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来源期刊

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies