Glass-ceramic coatings on titanium alloys for high temperature oxidation protection: Oxidation kinetics and microstructure

被引：65
|
作者：
Chen, Minghui [1 ]
Li, Wenbo [1 ]
Shen, Mingli [1 ]
Zhu, Shenglong [1 ]
Wang, Fuhui [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
CORROSION SCIENCE | 2013年 / 74卷
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Titanium; Glass; Oxidation; DIFFUSION-CONTROLLED PROCESSES; VITREOUS SILICA; BEHAVIOR; OXYGEN; RESISTANCE; INTERFACE; IMPLANTS; LAYER; IRON;
D O I：
10.1016/j.corsci.2013.04.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A glass-ceramic coating is applied on Ti-6Al-4V alloy for oxidation protection at 800 degrees C. Its dynamic oxidation and microstructure evolution are investigated. The titanium alloy substrate is effectively protected by the glass-ceramic coating, of which the oxidation develops at constant rate. The linear relationship of oxidation is deduced dm/dt = D rho(C-1 - C-2)/(bC'), and the diffusion coefficient of oxygen at 800 degrees C in glass is obtained. Oxygen diffusion through glass coating is the controlling step. After the initial firing, silicide interlayer forms between the glass coating and titanium alloy substrate, where the ratio of Ti/Si decreases after oxidation due to Si diffusion and Ti consumption. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：178 / 186
页数：9
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