Microstructure modifications and phase transformation in plasma-sprayed WC–Co coatings following post-spray spark plasma sintering

Li, Haisu; Khor, K.A.; Yu, Ligen; Cheang, P.

doi:10.1016/j.surfcoat.2004.04.075

Cited by 47 publications

(13 citation statements)

References 13 publications

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“…Current methods under investigation to fabricate WC‐Co/steel bi‐layer composites are spray coating methods (thermal, plasma, and high‐velocity oxygen fuel spraying HVOF), brazing welding methods, diffusion bonding, and co‐sintering methods . The most crucial factor during processing of bi‐layer composites is interface.…”

Section: Introductionmentioning

confidence: 99%

“…In order to optimize metallurgical and mechanical properties of the interfaces various materials and processing quantities have to be harmonized, which depend on the specific selected manufacturing process. Often the pores, cracks, thermal or residual stresses and even spalling at the interfaces have been observed . Bonding of layers is usually achieved by liquid or solid state.…”

Section: Introductionmentioning

confidence: 99%

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Study of steel‐WC interface produced by solid‐state capacitor discharge sinter‐welding

Maizza

Cagliero

Iacobone

et al. 2016

Surface & Interface Analysis

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Multimaterial components are more suitable than monolithic materials to combine several mechanical and functional properties simultaneously. Bi‐layer components made of WC‐Co and steel can combine enhanced wear resistance and toughness, which are beneficial for a wide range of advanced tribo‐structural applications. In this study, a new solid‐state capacitor discharge sinter‐welding (CDSW) process has been used to achieve an AISI M2 steel/WC–12% Co joint starting from green compacts. The CDSW process allows very short processing times, which help to prevent the coarsening of steel grains or WC particles, as well as avoid WC decomposition and minimize microstructural defects. The morphological, chemical, and structural characteristics of the phases and interface have been investigated. The results demonstrate an intimate bonding of the two joining materials and a significant diffusion of substitutional elements up to 100–150 µm apart from the interface. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of steel‐WC interface produced by solid‐state capacitor discharge sinter‐welding

Maizza

Cagliero

Iacobone

et al. 2016

Surface & Interface Analysis

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“…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]. In order to address issues related to porosity and degradation of the WC particles during coating, many different processes have been considered including laser cladding [13], spark plasma sintering [14], Hot Isostatic Pressing (HIPing) [15], heat treatment after spraying [16,17] and electro-thermal chemical spray methods [18].…”

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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“…Plasma sprayed ceramic and cermet coatings such as ZrO 2 , Al 2 O 3 , Cr 2 O 3 and WC/Co become a subject of great interest and provide solution for many industrial problems. [5][6][7][8] WC/Co cermet composite is widely used in the wear resistant application. The surface morphology of the coating for resistant wear is one of the most important techniques, but quite a few studies have been carried out on the coating surface profiles which have an influence on the coating quality.…”

Section: Introductionmentioning

confidence: 99%

Artificial neural networks for surface modification of cobalt based tungsten cemented carbide deposits

Jean¹,

Lin

2009

Surface Engineering

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This paper presents the application of artificial neural networks (ANNs) with statistical experiments to model and characterise WC/Co deposits of the plasma sprayings. In this study, the eight control factors were designed in a L18 factorial orthogonal array, and the effects of process conditions on the surface morphology were critically reviewed in the experiments. The surface topography properties and microstructure were studied.A gradient steepest descent algorithm in the trained ANN was used to explore the relationships between variables and responses. Artificial neural network modelling for WC/Co coatings estimation is compared by response surface methodology. The best values obtained were 2?164 and 2?871% of error percentage for the surface roughness by the best ANN and the response surface methodology model respectively. The experimental results indicate that using a statistical experiment coupled to an ANN strategy offers an effective, efficient and adaptive approach for developing a robust and highly efficient plasma sprayed process of high quality.

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Microstructure modifications and phase transformation in plasma-sprayed WC–Co coatings following post-spray spark plasma sintering

Cited by 47 publications

References 13 publications

Study of steel‐WC interface produced by solid‐state capacitor discharge sinter‐welding

Study of steel‐WC interface produced by solid‐state capacitor discharge sinter‐welding

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

Artificial neural networks for surface modification of cobalt based tungsten cemented carbide deposits

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