CVD–WC and WCxNy diffusion barrier coatings on WC/Co metalloceramics

Gogova, D.; Gesheva, K.A.; Veneva, A.

doi:10.1016/s0167-577x(97)00267-x

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…Important to mention that proper and uniform coating of the substrate is one of the main advantages of HFCVD process. 18 As well, it can be seen in this figure that honeycomb structure was grown on the substrate in the form of separated grains. On the other hand, the grain size of tungsten carbide increased with increasing the temperature of the substrate during the coating process.…”

Section: Methodsmentioning

confidence: 61%

“…As can be seen in this figure, the surface of the 316L stainless substrate was fully coated by a layer of tungsten carbide. Important to mention that proper and uniform coating of the substrate is one of the main advantages of HFCVD process . As well, it can be seen in this figure that honeycomb structure was grown on the substrate in the form of separated grains.…”

Section: Resultsmentioning

confidence: 84%

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The effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating in hot filament chemical vapor deposition

Sabzi

Anijdan

Asadian

2018

Int J Applied Ceramic Tech

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Effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating produced by hot filament chemical vapor deposition (HFCVD) process was studied. Annealed sheets of 316L stainless steels were used as the substrate. HFCVD technique, with substrate temperatures of 400 and 500°C, was used to deposit tungsten carbide coating on these sheets. Field Emission Scanning Electron Microscope (FE‐SEM) was used to study the evolution of microstructure. X‐Ray Diffraction spectroscopy was used to analyze the phases formed and Raman spectroscopy was employed to differentiate molecular composition of the coatings. The amount of the porosity of the coatings was measured and Vickers hardness measurement was used for hardness assessment. Results show that the tungsten carbide coatings have a honeycomb structure and increasing the temperature of the substrate increases the amount of porosity of the coating. XRD results showed that 3 different crystalline structures containing W, WC, and W2C were formed in the coating deposited on the 316L stainless steel. Increasing the temperature of the deposition has increased the intensity of the peaks in the XRD results. Raman spectroscopy results indicated the presence of a carbon in the tungsten carbide coatings. Finally, microhardness of the tungsten carbide coating increases with increasing the temperature of the substrate.

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Section: Methodsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 84%

The effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating in hot filament chemical vapor deposition

Sabzi

Anijdan

Asadian

2018

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…As can be seen in this figure, the surface of 316L stainless steel sub‐layer is coated thoroughly by a layer of tungsten carbide. Such a good coating characteristic is an advantage of chemical accommodation in the vapor phase that is able to cover the surface uniformly . It can be seen in Figure that by increasing the sub‐layer temperature, the amount of porosities (black points) in the coating has changed.…”

Section: Resultsmentioning

confidence: 97%

Effect of sub‐layer temperature during HFCVD process on morphology and corrosion behavior of tungsten carbide coating

Anijdan

Sabzi

Asadian

et al. 2018

Int J Applied Ceramic Tech

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WC coating was deposited on the polished and cleaned 316L stainless steel by Hot Filament Chemical Vapor Deposition (HFCVD) technique at 400°C and 500°C. Field Emission Gun Scanning Electron Microscope (FEG‐SEM) was used to study the corrosion morphology of the WC coatings. Energy dispersive spectroscopy (EDS) was used to analyze the chemical composition of the coatings. Coating porosity was measured by immersion in water. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were used to study the corrosion behavior of the coating in the solution of 1 mol/L H2SO4. Results showed that the WC coatings have a honeycomb microstructure where its porosity was increased at higher temperature of the sub‐layer. Also, the WC coating significantly increases the corrosion resistance of 316L stainless steel. And increasing the sub‐layer temperature in the HFCVD method reduces the corrosion resistance of the WC coating. Corrosion morphology was indicative of pitting corrosion of the WC coating.

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“…It looks very likely that WC x N y may exhibit high hardness similar to TiCN, CrCN, and TiSiN systems [4][5][6][7][8]. Up to the present, some optical, electrical, and structural properties have already been reported for the WC x N y films, using different techniques such as physical vapor deposition (PVD) [9], chemical vapor deposition (CVD) [10,11] or atomic layer deposition (ALD) [3,12]. However, so far, there have been very few reports on the mechanical properties for WC x N y films.…”

Section: Introductionmentioning

confidence: 99%

Effects of bias voltage and annealing on the structure and mechanical properties of WC0.75N0.25 thin films

Wen

et al. 2009

Journal of Alloys and Compounds

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CVD–WC and WCxNy diffusion barrier coatings on WC/Co metalloceramics

Cited by 10 publications

References 13 publications

The effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating in hot filament chemical vapor deposition

The effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating in hot filament chemical vapor deposition

Effect of sub‐layer temperature during HFCVD process on morphology and corrosion behavior of tungsten carbide coating

Effects of bias voltage and annealing on the structure and mechanical properties of WC0.75N0.25 thin films

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