Isothermal oxidation behavior and growth kinetics of silicide coatings formed on Nb-1Zr-0.1C alloy

被引：57

作者：

Majumdar, Sanjib ^{[1
]}

Kishor, J. ^{[1
]}

Paul, B. ^{[1
]}

Hubli, R. C. ^{[1
]}

Chakravartty, J. K. ^{[2
]}

机构：

[1] Mat Proc Div, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Mat Grp, Bombay 400085, Maharashtra, India

来源：

CORROSION SCIENCE | 2015年 / 95卷

关键词：

Intermetallics; Metal coatings; SEM; Weight loss; Oxidation; Oxide coatings; IN-SITU COMPOSITES; NB-RICH CORNER; PROTECTIVE-COATINGS; PACK CHEMISTRY; NIOBIUM; RESISTANCE; MICROSTRUCTURE; ALUMINIDE; BORON; MECHANISMS;

D O I：

10.1016/j.corsci.2015.02.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Isothermal oxidation behavior of the single layer NbSi2 and the double layered (NbSi2 + Nb5Si3) silicide coated Nb-1Zr-0.1C (wt.%) alloys has been studied between 800 and 1300 degrees C in static laboratory air. The single layer coated alloy shows a lower weight gain as compared to the double layer coatings at all temperatures. The formation of amorphous silica scale embedded with Nb2O5 oxide particles is observed beyond 1100 degrees C, and a superior oxidation resistance is detected between 1100 and 1300 degrees C. A kinetic equation relating the thickness of the coating layer with the various process parameters for pack siliconizing of Nb-alloy has been established. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：100 / 109

页数：10

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