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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12820
Title: Evaluation of thermocyclic oxidation behavior of HVOF-sprayed NiCrFeSiB coatings on boiler tube steels
Authors: Ramesh M.R.
Prakash S.
Nath S.K.
Sapra P.K.
Krishnamurthy N.
Published in: Journal of Thermal Spray Technology
Abstract: High velocity oxy-fuel (HVOF) spray process has grown into a well-accepted industrial technology for obtaining coatings resistant to significant surface degradation processes. In the present study, HVOF process was used to deposit Ni-based hardfacing NiCrFeSiB alloy powder on kinds of boiler tube steels designated as SA210 grade-A1, SA213-T11, and SA213-T22. The microstructures and several properties of the as-sprayed coatings have been investigated. Thermocyclic oxidation studies were performed in static air at 900 °C. NiCrFeSiB-coated steels showed slow oxidation kinetics and considerably lower weight gains than that of uncoated steels. The superior performance of NiCrFeSiB coatings can be attributed to continuous and protective thin oxide scale of amorphous SiO2 and Cr2O3 formed on the surface of the oxidized coatings. The combined technique of x-ray diffraction, scanning electron microscopy, energy dispersive x-ray analysis, and electron probe microanalysis are used to characterize reaction products of the oxidized surfaces. © 2010 ASM International.
Citation: Journal of Thermal Spray Technology (2011), 20(5): 992-1000
URI: https://doi.org/10.1007/s11666-010-9605-x
http://repository.iitr.ac.in/handle/123456789/12820
Issue Date: 2011
Publisher: Springer New York LLC
Keywords: boiler plants
cermet coatings
high temperature oxidation
HVOF microstructures
thermal cycling
ISSN: 10599630
Author Scopus IDs: 55761863100
36830433000
7102759700
25723667100
57195359354
Author Affiliations: Ramesh, M.R., Reva Institute of Technology and Management, Kattigenahalli, Yelahanka, Bangalore 560 064, India
Prakash, S., Metallurgical and Materials Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Nath, S.K., Metallurgical and Materials Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Sapra, P.K., Metallurgical and Materials Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Krishnamurthy, N., Sri Venkateshwara College of Engineering, Vidyanagar, Chikkajala, Bangalore 562 157, India
Corresponding Author: Ramesh, M.R.; Reva Institute of Technology and Management, Kattigenahalli, Yelahanka, Bangalore 560 064, India; email: mr_ramesh@rediffmail.com
Appears in Collections:Journal Publications [MT]

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