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Hot corrosion of YSZ/Al(2)O(3) dispersed NiCrAlY plasma-sprayed coatings in Na(2)SO(4)-10 wt.% NaCl melt

DSpace at IIT Bombay

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Title Hot corrosion of YSZ/Al(2)O(3) dispersed NiCrAlY plasma-sprayed coatings in Na(2)SO(4)-10 wt.% NaCl melt
 
Creator SREEDHAR, G
RAJA, VS
 
Subject thermal barrier coatings
yttria-stabilized zirconia
nondestructive evaluation
oxidation behavior
residual-stress
resistance
piezospectroscopy
microstructure
superalloy
powders
metal coatings
molten salts
hot corrosion
kinetics
 
Description This study examines the effect of ytrria stabilized zirconia (YSZ) dispersion on hot corrosion behaviour of NiCrAlY bond coat. Hot corrosion studies were conducted on NiCrAlY and NiCrAlY containing 25, 50 and 75 wt.% YSZ coatings obtained through the air plasma spray technique, in Na(2)SO(4) + 10 wt.% NaCl environment at 800 degrees C. The results show that YSZ dispersion lowers the overall hot corrosion tendency of the NiCrAlY, though it enhances the inherent hot corrosion tendency of its metallic constituent (NiCrAlY). Furthermore, there exists a threshold oxide level beyond which it adversely affects the hot corrosion of the coating.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-25T06:52:11Z
2011-12-26T12:56:57Z
2011-12-27T05:46:32Z
2011-08-25T06:52:11Z
2011-12-26T12:56:57Z
2011-12-27T05:46:32Z
2010
 
Type Article
 
Identifier CORROSION SCIENCE, 52(8), 2592-2602
0010-938X
http://dx.doi.org/10.1016/j.corsci.2010.04.007
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10928
http://hdl.handle.net/10054/10928
 
Language en