Transient stage oxidation behavior of Mo76Si14B10 alloy at 1150°C

被引：20
作者：
Roy, B. [1 ]
Das, J. [1 ]
Mitra, R. [1 ]
机构：
[1] Indian Inst Technol Kharagpur, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
来源：
CORROSION SCIENCE | 2013年 / 68卷
关键词：
Alloy; Intermetallics; SEM; Oxidation; Oxide coatings; Kinetic parameters; MO-SI-B; HIGH-TEMPERATURE OXIDATION; ELEVATED-TEMPERATURES; AL ALLOYS; WET AIR; RESISTANCE; SCALE; RANGE; MICROSTRUCTURE; INTERMETALLICS;
D O I：
10.1016/j.corsci.2012.11.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The transient stage during isothermal oxidation of Mo76Si14B10 has been studied at 1150 degrees C. The maximum mass loss is found to occur by volatilization of MoO3 within the first 480 s of exposure, which is considered to be the transient period. Scanning electron microscopic studies have revealed that a glassy borosilicate layer flows to cover the top surface, and thereby it acts as a protective coating. The thickness of the borosilicate layer increases with exposure time following a parabolic relationship. The mechanism of oxidation during transient period has been discussed with the help of an analytical model. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：231 / 237
页数：7
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