Isothermal oxidation of Ti-6Al-7Nb alloy

被引：34
作者：
Aniolek, K. [1 ]
Kupka, M. [1 ]
Luczuk, M. [1 ]
Barylski, A. [1 ]
机构：
[1] Univ Silesia, Inst Mat Sci, PL-41500 Chorzow, Poland
来源：
VACUUM | 2015年 / 114卷
关键词：
Titanium alloy; Oxidation; Scale; SEM; SURFACE MODIFICATION; TITANIUM-ALLOYS; CORROSION-RESISTANCE; BEHAVIOR; TEMPERATURE; NB;
D O I：
10.1016/j.vacuum.2015.01.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The properties of Ti-6Al-7Nb alloy oxidation in the temperature range from 500 to 800 degrees C, in various time periods between 20 min and 72 h, were examined. The rate of oxidation at temperatures of 600, 700 and 800 degrees C, determined on the basis of the weight gain, was described by a parabolic equation. The obtained oxidation activation energy value was 170 kJ/mol. In addition to oxidation kinetics, the phase composition and the surface morphology of the formed scale were determined. The phase composition of the oxide layers was complex and it changed with the oxidation temperature. At a higher temperature titanium oxide TiO2 in the form of rutile was the predominant phase. The continuity of the scale and the size of forming it oxide particles were increasing with temperature. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：114 / 118
页数：5
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