DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Proceedings papers >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/2584

Title: The influence of laser glazing on morphology, composition and microhardness of thermal sprayed Ni-WC coatings
Authors: KUMARI, S
KHANNA, AS
GASSER, A
Keywords: resistance
Issue Date: 2006
Publisher: ASM INTERNATIONAL
Citation: SURFACE ENGINEERING, PROCEEDINGS,128-135
Abstract: Ni-based, thermally sprayed coatings have many commercial applications for wear and corrosion resistance at low and moderate temperatures. The performance of Ni-based coatings can be improved further by adding hard precipitates such as carbides of refractory metals and cemented carbides. The properties of coatings can be further enhanced by laser glazing of the thermally sprayed coatings. In the present study, measurements such as microhardness, surface profile surface morphology and composition were used to compare nickel matrix coatings -NiCrBSi with different tungsten carbide content. The coatings were deposited by HVOF technique and then glazed using Nd:YAG Laser with different scan speeds. The effect of laser treatment and scan speeds were also investigated. Laser glazing of coatings affects the surface roughness in either way depending on the coating composition as well on the treatment parameters. The comparison of the microhardness values of coatings reveals that the microhardness increases by the post deposition treatment but the extent of increase depends on the scan speed as well as on the coating composition. The SEM/EDAX results explain the observations in terms of effect of laser glazing on the coating composition.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/15986
http://hdl.handle.net/100/2584
ISBN: 978-0-87170-835-9
Appears in Collections:Proceedings papers

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback