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Preparation and oxidation behavior of SiO2-Al2O3-glass composite coating on Ti-47Al-2Cr-2Nb alloy
W. B. Li; M. H. Chen; C. Wang; S. L. Zhu; F. H. Wang
2013
Source PublicationSurface & Coatings Technology
ISSN0257-8972
Volume218Pages:30-38
AbstractA SiO2-Al2O3-glass composite coating was prepared on Ti-47Al-2Cr-2Nb alloy by air spray technique and subsequent firing. The Ti-47Al-2Cr-2Nb alloy with and without composite coating were oxidized in air for 100 h at 800 degrees C and 900 degrees C, respectively. Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and electron probe microanalysis (EPMA) technique have been employed to study the microstructures of the specimens before and after oxidation tests, X-ray diffraction (XRD) was used to analyze the oxide phase. For the bare Ti-47Al-2Cr-2Nb alloy, a typical layered structure oxide scale formed, the outer layer is TiO2, the intermediate one is an Al2O3-rich layer, the inner one is a mixture of TiO2 and Al2O3, a small amount of dissolved Cr and Nb ion being preferentially segregated in the inner layer. The composite coating provides good oxidation resistance for the Ti-47Al-2Cr-2Nb alloy. An interfacial reaction of the composite coating and the substrate occurred, forming an Al2O3/Ti5Si3/Al2O3/Z-phase Ti5Al3O2 layered structure in the interfacial zone. The composite coating/Al2O3 bilayer act as oxygen diffusion barrier and benefit oxidation resistance of the Ti-47Al-2Cr-2Nb alloy. Al2O3 and quartz were instable in the glass phase; Al2O3 and quartz inclusions partially dissolved into the glass phase, and some quartz particles transformed into cristobalite. (C) 2012 Elsevier B.V. All rights reserved.
description.department[li, wenbo ; chen, minghui ; wang, cheng ; zhu, shenglong ; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; li, wb (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62wencui rd, shenyang 110016, peoples r china. ; liwb@imr.ac.cn
KeywordTi-47al-2cr-2nb Alloy Sio2-al2o3-glass Composite Coating Oxidation Interfacial Reaction High-temperature Oxidation Alpha Titanium-alloy Tial-based Alloys Mechanical-properties Corrosion Behavior Elastic Properties Thermal-expansion Glass Composites Resistance Enamel
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71329
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
W. B. Li,M. H. Chen,C. Wang,et al. Preparation and oxidation behavior of SiO2-Al2O3-glass composite coating on Ti-47Al-2Cr-2Nb alloy[J]. Surface & Coatings Technology,2013,218:30-38.
APA W. B. Li,M. H. Chen,C. Wang,S. L. Zhu,&F. H. Wang.(2013).Preparation and oxidation behavior of SiO2-Al2O3-glass composite coating on Ti-47Al-2Cr-2Nb alloy.Surface & Coatings Technology,218,30-38.
MLA W. B. Li,et al."Preparation and oxidation behavior of SiO2-Al2O3-glass composite coating on Ti-47Al-2Cr-2Nb alloy".Surface & Coatings Technology 218(2013):30-38.
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