Improvements in hardness and wear resistance of thermally sprayed WC-Co nanocomposite coatings

Baik, Kyeong Ho; Kim, J.H.; Seong, B.G.

doi:10.1016/j.msea.2006.02.295

Cited by 53 publications

(18 citation statements)

References 6 publications

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“…Other reports, however, indicate that the use of feedstock powders with nanoscale carbides leads to excessive decomposition during thermal spraying, and thus to embrittled coatings with low wear resistance ( Ref 11,12). The foregoing findings for the abrasion response of thermally sprayed WC-Co coatings show a slight reverse trend compared to those obtained for sintered cermets ( Ref 13,14).…”

Section: Introductionmentioning

confidence: 90%

Microstructure and Wear Behavior of Conventional and Nanostructured Plasma-Sprayed WC-Co Coatings

et al. 2010

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WC-12%Co coatings were deposited by atmospheric plasma spraying using conventional and nanostructured powders and two secondary plasmogenous gases (He and H 2 ). Coating microstructure and phase composition were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and x-ray diffraction techniques (XRD) techniques. This study examined wear and friction properties of the coatings under dry friction conditions. SEM was used to analyze abraded surface microstructure. Coating microhardness and fracture toughness were also determined. All coatings displayed strong decarburization as a result of WC decomposition, which gave rise to the formation of secondary phases (W 2 C and W). A very fine undissolved WC crystalline dispersion coexisted with these new phases. TEM observation confirmed that the matrix was predominantly amorphous and filled with block-type, frequently dislocated crystallites. Wear was observed to follow a three-body abrasive mechanism, since debris between the ball and the coating surface was detected. The main wear mechanism was based on subsurface cracking, owing to the arising debris. WC grain decomposition and dissolution were concluded to be critical factors in wear resistance. The level of decomposition and dissolution could be modified by changing the plasmogenous gas or feed powder grain size. The influence of the plasmogenous gas on wear resistance was greater than the influence of feedstock particle size.

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Section: Introductionmentioning

confidence: 90%

Microstructure and Wear Behavior of Conventional and Nanostructured Plasma-Sprayed WC-Co Coatings

et al. 2010

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“…The most widely-used WC-Co coating production technique is based on thermal spray processes [17]. In these processes, feedstock powders are fed into a high-temperature flame, where they are rapidly melted and accelerated towards a substrate to form a 50 to 200 μm thick coating.…”

Section: Introductionmentioning

confidence: 99%

Hardness and Young's modulus distributions in atmospheric plasma sprayed WC–Co coatings using nanoindentation

Rayón

Bonache

Salvador

et al. 2011

Surface and Coatings Technology

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Registro de acceso restringido Este recurso no está disponible en acceso abierto por política de la editorial. No obstante, se puede acceder al texto completo desde la Universitat Jaume I o si el usuario cuenta con suscripción. Registre d'accés restringit Aquest recurs no està disponible en accés obert per política de l'editorial. No obstant això, es pot accedir al text complet des de la Universitat Jaume I o si l'usuari compta amb subscripció. Restricted access item This item isn't open access because of publisher's policy. The full--text version is only available from Jaume I University or if the user has a running suscription to the publisher's contents.

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“…This suggests that the WC particles and a martensitic structure contributed to the hardening through this region. The martensitic structure is harder than ferritepearlite structure and in most cases during dry sliding wear this leads to greater wear resistance when hardness is increased [4]. The presence of retained austenite can increase the toughness of the structure.…”

Section: Resultsmentioning

confidence: 99%

“…Many attempts have been made to improve the microstructure and mechanical properties of the sprayed material. In some cases additional materials were used such as a Co layer [4], electroless Ni-P coated WC-12Co feedstock powders [5], different Co percentages [6] or WC-Co/copper multilayer coatings [7]. Some other researchers studied the effect of thermal spray parameters such as powder size [8,9], incorporating different binders [10] or the fuel type [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effects of friction stir processing on wear properties of WC–12%Co sprayed on 52100 steel

Rahbar-Kelishami

Abdollah-zadeh

Hadavi³

et al. 2015

Materials & Design

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Improvements in hardness and wear resistance of thermally sprayed WC-Co nanocomposite coatings

Cited by 53 publications

References 6 publications

Microstructure and Wear Behavior of Conventional and Nanostructured Plasma-Sprayed WC-Co Coatings

Microstructure and Wear Behavior of Conventional and Nanostructured Plasma-Sprayed WC-Co Coatings

Hardness and Young's modulus distributions in atmospheric plasma sprayed WC–Co coatings using nanoindentation

Effects of friction stir processing on wear properties of WC–12%Co sprayed on 52100 steel

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