Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings

R. Ahmed; N. H. Faisal; Nayef M. Al-Anazi; S. Al-Mutairi; F. L. Toma; L. M. Berger; A. Potthoff; E. K. Polychroniadis; M. Sall; D. Chaliampalias; M. F A Goosen

doi:10.1007/s11666-014-0174-2

Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings

R. Ahmed^*, N. H. Faisal, Nayef M. Al-Anazi, S. Al-Mutairi, F. L. Toma, L. M. Berger, A. Potthoff, E. K. Polychroniadis, M. Sall, D. Chaliampalias, M. F A Goosen

^*Corresponding author for this work

School of Engineering & Physical Sciences

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

37 Citations (Scopus)

Abstract

Tribomechanical properties of nanostructured coatings deposited by suspension high velocity oxy-fuel (S-HVOF) and conventional HVOF (Jet Kote) spraying were evaluated. Nanostructured S-HVOF coatings were obtained via ball milling of the agglomerated and sintered WC-12Co feedstock powder, which were deposited via an aqueous-based suspension using modified HVOF (TopGun) process. Microstructural evaluations of these hardmetal coatings included transmission electron microscopy, x-ray diffraction, and scanning electron microscopy equipped with energy dispersive x-ray spectroscopy. The nanohardness and modulus of the coated specimens were investigated using a diamond Berkovich nanoindenter. Sliding wear tests were conducted using a ball-on-flat test rig. Results indicated that low porosity coatings with nanostructured features were obtained. High carbon loss was observed, but coatings showed a high hardness up to 1000 HV_2.9N. S-HVOF coatings also showed improved sliding wear and friction behavior, which were attributed to nanosized particles reducing ball wear in three-body abrasion and support of metal matrix due to uniform distribution of nanoparticles in the coating microstructure.

Original language	English
Pages (from-to)	357-377
Number of pages	28
Journal	Journal of Thermal Spray Technology
Volume	24
Issue number	3
DOIs	https://doi.org/10.1007/s11666-014-0174-2
Publication status	Published - Feb 2015

Keywords

nanoindentation
nanostructured coating
suspension spraying
tribology
WC-Co coating
wear

ASJC Scopus subject areas

Condensed Matter Physics
Materials Chemistry
Surfaces, Coatings and Films

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10.1007/s11666-014-0174-2

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title = "Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings",

abstract = "Tribomechanical properties of nanostructured coatings deposited by suspension high velocity oxy-fuel (S-HVOF) and conventional HVOF (Jet Kote) spraying were evaluated. Nanostructured S-HVOF coatings were obtained via ball milling of the agglomerated and sintered WC-12Co feedstock powder, which were deposited via an aqueous-based suspension using modified HVOF (TopGun) process. Microstructural evaluations of these hardmetal coatings included transmission electron microscopy, x-ray diffraction, and scanning electron microscopy equipped with energy dispersive x-ray spectroscopy. The nanohardness and modulus of the coated specimens were investigated using a diamond Berkovich nanoindenter. Sliding wear tests were conducted using a ball-on-flat test rig. Results indicated that low porosity coatings with nanostructured features were obtained. High carbon loss was observed, but coatings showed a high hardness up to 1000 HV2.9N. S-HVOF coatings also showed improved sliding wear and friction behavior, which were attributed to nanosized particles reducing ball wear in three-body abrasion and support of metal matrix due to uniform distribution of nanoparticles in the coating microstructure.",

keywords = "nanoindentation, nanostructured coating, suspension spraying, tribology, WC-Co coating, wear",

author = "R. Ahmed and Faisal, {N. H.} and Al-Anazi, {Nayef M.} and S. Al-Mutairi and Toma, {F. L.} and Berger, {L. M.} and A. Potthoff and Polychroniadis, {E. K.} and M. Sall and D. Chaliampalias and Goosen, {M. F A}",

year = "2015",

month = feb,

doi = "10.1007/s11666-014-0174-2",

language = "English",

volume = "24",

pages = "357--377",

journal = "Journal of Thermal Spray Technology",

issn = "1059-9630",

publisher = "Springer",

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TY - JOUR

T1 - Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings

AU - Ahmed, R.

AU - Faisal, N. H.

AU - Al-Anazi, Nayef M.

AU - Al-Mutairi, S.

AU - Toma, F. L.

AU - Berger, L. M.

AU - Potthoff, A.

AU - Polychroniadis, E. K.

AU - Sall, M.

AU - Chaliampalias, D.

AU - Goosen, M. F A

PY - 2015/2

Y1 - 2015/2

N2 - Tribomechanical properties of nanostructured coatings deposited by suspension high velocity oxy-fuel (S-HVOF) and conventional HVOF (Jet Kote) spraying were evaluated. Nanostructured S-HVOF coatings were obtained via ball milling of the agglomerated and sintered WC-12Co feedstock powder, which were deposited via an aqueous-based suspension using modified HVOF (TopGun) process. Microstructural evaluations of these hardmetal coatings included transmission electron microscopy, x-ray diffraction, and scanning electron microscopy equipped with energy dispersive x-ray spectroscopy. The nanohardness and modulus of the coated specimens were investigated using a diamond Berkovich nanoindenter. Sliding wear tests were conducted using a ball-on-flat test rig. Results indicated that low porosity coatings with nanostructured features were obtained. High carbon loss was observed, but coatings showed a high hardness up to 1000 HV2.9N. S-HVOF coatings also showed improved sliding wear and friction behavior, which were attributed to nanosized particles reducing ball wear in three-body abrasion and support of metal matrix due to uniform distribution of nanoparticles in the coating microstructure.

AB - Tribomechanical properties of nanostructured coatings deposited by suspension high velocity oxy-fuel (S-HVOF) and conventional HVOF (Jet Kote) spraying were evaluated. Nanostructured S-HVOF coatings were obtained via ball milling of the agglomerated and sintered WC-12Co feedstock powder, which were deposited via an aqueous-based suspension using modified HVOF (TopGun) process. Microstructural evaluations of these hardmetal coatings included transmission electron microscopy, x-ray diffraction, and scanning electron microscopy equipped with energy dispersive x-ray spectroscopy. The nanohardness and modulus of the coated specimens were investigated using a diamond Berkovich nanoindenter. Sliding wear tests were conducted using a ball-on-flat test rig. Results indicated that low porosity coatings with nanostructured features were obtained. High carbon loss was observed, but coatings showed a high hardness up to 1000 HV2.9N. S-HVOF coatings also showed improved sliding wear and friction behavior, which were attributed to nanosized particles reducing ball wear in three-body abrasion and support of metal matrix due to uniform distribution of nanoparticles in the coating microstructure.

KW - nanoindentation

KW - nanostructured coating

KW - suspension spraying

KW - tribology

KW - WC-Co coating

KW - wear

U2 - 10.1007/s11666-014-0174-2

DO - 10.1007/s11666-014-0174-2

M3 - Article

SN - 1059-9630

VL - 24

SP - 357

EP - 377

JO - Journal of Thermal Spray Technology

JF - Journal of Thermal Spray Technology

IS - 3

ER -

Structure property relationship of suspension thermally sprayed WC-Co nanocomposite coatings

Abstract

Keywords

ASJC Scopus subject areas

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