Effects of TiC addition on properties of laser particle deposited WC-Co-Cr and WC-Ni coatings

B. A. Obadele, P. A. Olubambi, O. T. Johnson

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The mechanisms by which titanium carbide (TiC) improves the properties of tungsten carbide (WC) coatings deposited on duplex stainless steels using laser particle injection technique were investigated. The relationships between laser process parameters and the synthesized composite were studied. The morphologies and microstructures of the feedstock powders and composite coatings were characterized using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) techniques. Surface hardness of the composite layers was determined using the Vickers microhardness tester while its corrosion behaviour in 3.5% NaCl solution was investigated by potentiodynamic polarization curve measurement method. As a result of the laser treatment, microstructures characterized by hard ceramic particles with strong bonding to substrate were formed on the surface layer of the steels. The addition of TiC to WC resulted in microstructures free from cracks, pores and intermetallics which could be detrimental to the properties of the composites. High microhardness was observed and most of the coatings shifted the corrosion potential to more noble values with the pseudo-passive curve. © 2013 The Nonferrous Metals Society of China.
Original languageEnglish
Pages (from-to)3634-3642
Number of pages9
JournalTransactions of Nonferrous Metals Society of China
Volume23
Issue number12
DOIs
Publication statusPublished - Dec 2013

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titanium carbides
Titanium carbide
titanium
coating
laser
coatings
Coatings
Microhardness
microstructure
Microstructure
composite materials
Lasers
Composite materials
microhardness
Corrosion
lasers
corrosion
Powder coatings
Nonferrous metals
Tungsten carbide

Cite this

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title = "Effects of TiC addition on properties of laser particle deposited WC-Co-Cr and WC-Ni coatings",
abstract = "The mechanisms by which titanium carbide (TiC) improves the properties of tungsten carbide (WC) coatings deposited on duplex stainless steels using laser particle injection technique were investigated. The relationships between laser process parameters and the synthesized composite were studied. The morphologies and microstructures of the feedstock powders and composite coatings were characterized using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) techniques. Surface hardness of the composite layers was determined using the Vickers microhardness tester while its corrosion behaviour in 3.5{\%} NaCl solution was investigated by potentiodynamic polarization curve measurement method. As a result of the laser treatment, microstructures characterized by hard ceramic particles with strong bonding to substrate were formed on the surface layer of the steels. The addition of TiC to WC resulted in microstructures free from cracks, pores and intermetallics which could be detrimental to the properties of the composites. High microhardness was observed and most of the coatings shifted the corrosion potential to more noble values with the pseudo-passive curve. {\circledC} 2013 The Nonferrous Metals Society of China.",
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Effects of TiC addition on properties of laser particle deposited WC-Co-Cr and WC-Ni coatings. / Obadele, B. A.; Olubambi, P. A.; Johnson, O. T.

In: Transactions of Nonferrous Metals Society of China, Vol. 23, No. 12, 12.2013, p. 3634-3642.

Research output: Contribution to journalArticle

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AU - Olubambi, P. A.

AU - Johnson, O. T.

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AB - The mechanisms by which titanium carbide (TiC) improves the properties of tungsten carbide (WC) coatings deposited on duplex stainless steels using laser particle injection technique were investigated. The relationships between laser process parameters and the synthesized composite were studied. The morphologies and microstructures of the feedstock powders and composite coatings were characterized using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) techniques. Surface hardness of the composite layers was determined using the Vickers microhardness tester while its corrosion behaviour in 3.5% NaCl solution was investigated by potentiodynamic polarization curve measurement method. As a result of the laser treatment, microstructures characterized by hard ceramic particles with strong bonding to substrate were formed on the surface layer of the steels. The addition of TiC to WC resulted in microstructures free from cracks, pores and intermetallics which could be detrimental to the properties of the composites. High microhardness was observed and most of the coatings shifted the corrosion potential to more noble values with the pseudo-passive curve. © 2013 The Nonferrous Metals Society of China.

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