Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC-Co coatings

A. K. Basak; J. P. Celis; M. Vardavoulias; P. Matteazzi

doi:10.1016/j.surfcoat.2012.02.030

Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC-Co coatings

A. K. Basak, J. P. Celis^*, M. Vardavoulias, P. Matteazzi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

Nanostructured WC-Co and WC-Co-Al coatings, with about 300-μm as-deposited coating thickness, were deposited by high velocity oxy-fuel (HVOF) spraying. Agglomerated nanostructured cermet powders produced by the Mechanomade ^® process was used for HVOF spraying. Dense and well-adherent coatings with crystal sizes below 30nm were deposited on stainless steel 304 substrate. Porosity was less than 5% and the bond strength with the substrate was around 60MPa. Experimental data on friction, wear, and abrasion resistance revealed that nanostructured WC-Co based coatings containing some Al as alloying element, exhibit improved tribological characteristics in comparison to nanostructured and micron-sized WC-Co coatings. This was attributed to a carbide particle distribution within the coating revealed by SEM, the absence of brittle W ₂C-like phases revealed by XRD, and the presence of Al at particle/matrix boundaries revealed by TEM.

Original language	English
Pages (from-to)	3508-3516
Number of pages	9
Journal	Surface and Coatings Technology
Volume	206
Issue number	16
DOIs	https://doi.org/10.1016/j.surfcoat.2012.02.030
Publication status	Published - 15 Apr 2012

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title = "Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC-Co coatings",

abstract = "Nanostructured WC-Co and WC-Co-Al coatings, with about 300-μm as-deposited coating thickness, were deposited by high velocity oxy-fuel (HVOF) spraying. Agglomerated nanostructured cermet powders produced by the Mechanomade {\textregistered} process was used for HVOF spraying. Dense and well-adherent coatings with crystal sizes below 30nm were deposited on stainless steel 304 substrate. Porosity was less than 5% and the bond strength with the substrate was around 60MPa. Experimental data on friction, wear, and abrasion resistance revealed that nanostructured WC-Co based coatings containing some Al as alloying element, exhibit improved tribological characteristics in comparison to nanostructured and micron-sized WC-Co coatings. This was attributed to a carbide particle distribution within the coating revealed by SEM, the absence of brittle W 2C-like phases revealed by XRD, and the presence of Al at particle/matrix boundaries revealed by TEM.",

keywords = "Aluminium alloying, HVOF, Nanostructuring, Tribology, WC-12Co",

author = "Basak, {A. K.} and Celis, {J. P.} and M. Vardavoulias and P. Matteazzi",

year = "2012",

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language = "English",

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TY - JOUR

T1 - Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC-Co coatings

AU - Basak, A. K.

AU - Celis, J. P.

AU - Vardavoulias, M.

AU - Matteazzi, P.

PY - 2012/4/15

Y1 - 2012/4/15

N2 - Nanostructured WC-Co and WC-Co-Al coatings, with about 300-μm as-deposited coating thickness, were deposited by high velocity oxy-fuel (HVOF) spraying. Agglomerated nanostructured cermet powders produced by the Mechanomade ® process was used for HVOF spraying. Dense and well-adherent coatings with crystal sizes below 30nm were deposited on stainless steel 304 substrate. Porosity was less than 5% and the bond strength with the substrate was around 60MPa. Experimental data on friction, wear, and abrasion resistance revealed that nanostructured WC-Co based coatings containing some Al as alloying element, exhibit improved tribological characteristics in comparison to nanostructured and micron-sized WC-Co coatings. This was attributed to a carbide particle distribution within the coating revealed by SEM, the absence of brittle W 2C-like phases revealed by XRD, and the presence of Al at particle/matrix boundaries revealed by TEM.

AB - Nanostructured WC-Co and WC-Co-Al coatings, with about 300-μm as-deposited coating thickness, were deposited by high velocity oxy-fuel (HVOF) spraying. Agglomerated nanostructured cermet powders produced by the Mechanomade ® process was used for HVOF spraying. Dense and well-adherent coatings with crystal sizes below 30nm were deposited on stainless steel 304 substrate. Porosity was less than 5% and the bond strength with the substrate was around 60MPa. Experimental data on friction, wear, and abrasion resistance revealed that nanostructured WC-Co based coatings containing some Al as alloying element, exhibit improved tribological characteristics in comparison to nanostructured and micron-sized WC-Co coatings. This was attributed to a carbide particle distribution within the coating revealed by SEM, the absence of brittle W 2C-like phases revealed by XRD, and the presence of Al at particle/matrix boundaries revealed by TEM.

KW - Aluminium alloying

KW - HVOF

KW - Nanostructuring

KW - Tribology

KW - WC-12Co

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U2 - 10.1016/j.surfcoat.2012.02.030

DO - 10.1016/j.surfcoat.2012.02.030

M3 - Article

SN - 0257-8972

VL - 206

SP - 3508

EP - 3516

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 16

ER -

Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC-Co coatings

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