Oxidation mechanism of a near ?-Ti alloy

被引：14
作者：
Chen, Wei [1 ,2 ,3 ]
Li, Qifeng [1 ,2 ]
Zhou, Libo [1 ,2 ]
Qiu, Wei [1 ,2 ]
Ren, Yanjie [1 ,2 ]
Li, Cong [1 ,2 ]
Chen, Jian [1 ,2 ]
Lin, Yongcheng [4 ]
Zhou, Kechao [3 ]
机构：
[1] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Changsha 410114, Hunan, Peoples R China
[2] Changsha Univ Sci & Technol, Educ Dept Hunan Prov, Key Lab Energy Efficiency & Clean Utilizat, Changsha 410114, Hunan, Peoples R China
[3] Cent South Univ, State Key Lab Powder Met, Lu Mt South Rd, Changsha 410083, Hunan, Peoples R China
[4] Cent South Univ, Sch Mech & Elect Engn, Changsha 410083, Peoples R China
来源：
MATERIALS & DESIGN | 2022年 / 223卷
基金：
中国国家自然科学基金;
关键词：
Ti-55511; alloy; Oxidation mechanism; Magn?li phases; Polymorphic phase transformation; Higher-valence oxide; METAL-INSULATOR-TRANSITION; THERMAL-OXIDATION; BEHAVIOR; VANADIUM; OXYGEN; FILM; MICROSTRUCTURE; RESISTANCE; SEPARATION; EVOLUTION;
D O I：
10.1016/j.matdes.2022.111144
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Near 6-Ti alloys, a perfect candidate material for numerous applications in the aerospace, are expected to exhibit high temperature endurability. Here, in order to evaluate the high temperature oxidation mech-anism of the near 6-Ti alloy, detailed microstructural characterization was performed on a near 6-Ti alloy, Ti-55511 alloy after isothermal heat treatment at 600 degrees C in a tube furnace. Parabolic oxidation kinetics was observed. The oxide layer consisted of Al2O3, TiO2, VO2, and Magneli phases. Polymorphic phase transformations and Magneli phases played critical roles in the oxide layer thickening. The formation of defects was highly correlated with the incorporation of oxygen into Al2O3 and VO2, which resulted in lattice distortion of the oxides. Continuous oxidation led to the formation of the higher-valence oxide V2O5 in VO2 particles.(c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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页数：11
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