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Microstructural studies of electrospark deposited aluminide coatings on 9Cr steels

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Title Microstructural studies of electrospark deposited aluminide coatings on 9Cr steels
 
Creator JAMNAPARA, NI
FRANGINI, S
AVTANI, DU
NAYAK, VS
CHAUHAN, NL
JHALA, G
MUKHERJEE, S
KHANNA, AS
 
Subject Electrospark deposition
Aluminide
Blanket
9Cr Steels
FERRITIC-MARTENSITIC STEELS
HIGH-TEMPERATURE CORROSION
RESEARCH-AND-DEVELOPMENT
FUSION
MORPHOLOGY
HARDNESS
MODULUS
FILMS
 
Description Electrospark deposition (ESD) technique has been used to apply an iron aluminide coating on 9Cr reduced activation steel, which is a structural material for test blanket modules of fusion reactors. Phase identification and microstructural analysis of the aluminide coating along with the interface region were performed with the support of X-ray diffraction technique, optical microscopy, scanning electron microscopy and nanoindentation hardness measurements. Microstructural examination indicated prominent changes in the near interface microstructure of the steels processed by the ESD process. The substrate side of the coating/substrate interface consisted of a soft zone that is possibly of quasi-amorphous nature and of an M23C6 type carbide segregation rich area below this interface. The coating, however, showed extensive crack defects that need to be removed for reliably assessing its suitability as a barrier layer for blanket applications.
 
Publisher MANEY PUBLISHING
 
Date 2014-10-16T12:40:07Z
2014-10-16T12:40:07Z
2012
 
Type Article
 
Identifier SURFACE ENGINEERING, 28(9)700-704
http://dx.doi.org/10.1179/1743294412Y.0000000043
http://dspace.library.iitb.ac.in/jspui/handle/100/15570
 
Language en