Suspension Plasma Spraying of Nanostructured WC-12Co Coatings

Berghaus, J. Oberste; Marple, Basil R.; Moreau, Christian

doi:10.1361/105996306x147072

Cited by 91 publications

(51 citation statements)

References 6 publications

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“…However, thermal spraying of these nanocomposite hardmetal coatings, especially WC-Co, is technologically challenging. By this reason, so far only few studies on this topic are published in the literature [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…The first investigation of suspension sprayed WC-Co coatings was done by Oberste Berghaus et al [24]. They conducted a comprehensive study in order to develop WC12%Co nanocomposite coatings by suspension spraying using a commercial atmospheric plasma spray process (APS) (AXIAL III, Northwest Mettech Corp., Canada) of an ethanol-based suspension with 20 wt% solid concentration and an internal injector.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

et al. 2017

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The potential to improve the tribomechanical performance of HVOF-sprayed WC-12Co coatings was studied by using aqueous WC-12Co suspensions as feedstock. Both as-sprayed and hot-isostatic-pressed (HIPed) coatings were studied. Mathematical models of wear rate based on the structure property relationships, even for the conventionally sprayed WC-Co hardmetal coatings, are at best based on the semiempirical approach. This paper aims to develop these semiempirical mathematical models for suspension sprayed nanocomposite coatings in as-sprayed and heat-treated (HIPed) conditions. Microstructural evaluations 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 the HIPing post-treatment resulted in crystallization of amorphous coating phases and increase in elastic modulus and hardness. Influence of these changes in the wear mechanisms and wear rate is discussed. Results are also compared with conventionally sprayed high-velocity oxy-fuel hardmetal WC-Co coatings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

et al. 2017

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“…This technique is known as Suspension Plasma Spraying (SPS) and differs significantly from conventional APS since the suspension is fragmented into droplets and the liquid phase vaporised before the solid feedstock is processed [24,25]. This novel technique has recently undergone an extensive development, leading to the deposition of nanostructured coatings with unique properties for solid oxide fuel cells (SOFC) functional layers [28,29], thermal barrier coatings [30,31], photocatalytic layers [32,33], wear resistant coatings [34] or bioactive layers [35].…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

Bannier

Vicent

Rayón

et al. 2014

Applied Surface Science

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Versión / Versió:Preprint were used as starting materials. The coatings microstructure and phase composition were fully characterised using FEG-SEM and XRD techniques. Nanoindentation technique was used to determine the coatings hardness and elastic modulus properties.Results have shown that the addition of titania to alumina SPS coatings causes different crystalline phases and a higher powder melting rate is reached. The higher melted material achieved, when titania is added leads to higher hardness and elastic modulus when the same spraying parameters are used.

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“…For various thermal spray techniques, numerous studies emphasized the enhanced wear resistance of WC reinforced coatings against sliding wear [1], abrasive wear RESEARCH [2] as well as erosion [3] and erosion-corrosion [4]. For high velocity oxy fuel [5,6], plasma [7,8] and suspension flame [9] sprayed coatings, several authors investigated the tribological characteristics of stressed surfaces by employing different tungsten carbide grain-sized feedstocks. It was found that a decreased carbide grain size possesses a higher resistance against abrasion, sliding, or erosive wear.…”

Section: Introductionmentioning

confidence: 99%

Tribological Characteristics of Tungsten Carbide Reinforced Arc Sprayed Coatings using Different Carbide Grain Size Fractions

Tillmann¹,

Hagen²,

Schröder³

2017

Tribol. Ind.

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Suspension Plasma Spraying of Nanostructured WC-12Co Coatings

Cited by 91 publications

References 6 publications

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

Tribological Characteristics of Tungsten Carbide Reinforced Arc Sprayed Coatings using Different Carbide Grain Size Fractions

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