Diamond deposition on WC–Co substrate with amorphous SiC interlayer

Cui, Yu-xiao; Shen, Bin; Sun, Fei

doi:10.1179/1743294414y.0000000250

Cited by 17 publications

(3 citation statements)

References 23 publications

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“…The cobalt on the surface was then dissolved with acid (H 2 SO 4 : H 2 O 2 = 1:10) during 60s [23]. Because the substrate surface contains cobalt, which could catalyse at high temperature the undesirable growth of graphite and of other forms of carbon phases unrelated to diamond [24], resulting in poor adhesion and grain quality, the etching step is mandatory. Finally, the pretreated samples were seeded with nano-diamond powder suspension ultrasonically for 30 min in order to optimize diamond nucleation [25].…”

Section: Methodsmentioning

confidence: 99%

Wear behaviour of gradient-multilayer diamond coatings deposited on cemented-carbide substrates

Yang

et al. 2022

Surface Engineering

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HFCVD method was used to prepare and characterize single and gradient multi-layered diamond coatings on tungsten carbide. The wear behaviour was evaluated in ambient air, against Si 3 N 4 ceramic balls. The results demonstrated that with the increase of carbon-source concentration from 1% to 5%, the diamond surface grains gradually refined and formed crystal clusters, and the roughness (Ra) of diamond surface decreased from 62.3 to 32.54 nm. Concerning the 100, 300, and 600 nm gradient of multilayer diamond coatings, the roughness Ra was 31.3, 35.6, and 40.5 nm, respectively. The diamond film obtained with 1% CH 4 concentration exhibited poor wear resistance. For higher CH 4 concentration, the abrasion resistance increased gradually. The average friction coefficient of multilayer diamond coatings decreased from 0.052 to 0.023 as the modulated layer thickness increased from 100 to 600 nm. The gradient multilayer structure significantly improved the tribological behaviour.

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Section: Methodsmentioning

confidence: 99%

Wear behaviour of gradient-multilayer diamond coatings deposited on cemented-carbide substrates

Yang

et al. 2022

Surface Engineering

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“…Another viable strategy is the deposition of intermediate layers, acting as diffusion barriers for Co and minimizing effects from the thermal expansion difference. Among several possible interlayers cited in the literature, silicon carbide (SiC) is pointed as one of the best options for such application 7,[10][11][12][13][14][15][16][17][18][19][20] . SiC is extensively used in abrasive tools, ceramics, insulation, metallurgical applications, refractories, and wear resistant materials, and this is due to its superior properties, including wide bandgap, low density, low thermal expansion, excellent thermal shock/oxidation/chemical resistance, high hardness, and high thermal conductivity 18,21 .…”

Section: Introductionmentioning

confidence: 99%

A New Two-Step Method for Laser Cladding of Silicon Carbide in Wc-Co Substrates

et al. 2023

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WC-Co cutting tools are widely used by the metalworking industry. In order to improve the properties of these tools, research on the application of wear-resistant coatings, such as polycrystalline diamond, are of great importance to several applications. It is known that the occurrence of high-stress levels between the coating and the substrate can lead to adhesion failures. One strategy to minimize these failures is applying an intermediate layer of SiC. In this work, the deposition of a SiC layer was carried out by a novel two-step laser cladding approach. Instead of cladding directly the presynthesized SiC on the substrates, a 200 µm silicon powder layer was pre-deposited on the WC-Co substrates and then irradiated with a 30 W CO 2 laser. To improve metallurgical bonding between the tungsten and the Si layer, all substrates were chemically attacked. This attack allows cobalt removal from the surface and increases surface roughness, improving the laser cladding process. After the SiC laser cladding, samples were coated with a 200 µm graphite powder layer and irradiated again by a CO 2 laser. The samples were characterized by SEM, EDS, and XRD analysis. The results showed that in the first step, an irradiation energy of about 0.27 J was enough to fuse the silicon powder to the substrate and in the second step, 0.13 J was enough to promote the reaction between silicon, carbon and the WC substrate, resulting in the in-situ synthesis of SiC. Finally, a new method was proposed for the deposition of SiC on WC-Co based substrates and the observed results allowed the proposal of an empirical equation to describe the chemical reactions of the process.

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“…And the influence of texture on the adhesion strength and cutting performance of the boron doped diamond (BDD) film is analysed by an indentation test and cutting test, respectively. deposition process, all the WC-Co substrate was pretreated by Murakami's reagent and Caro's acid etching procedure to coarse the surface and remove the surface Co element [14,15]. The mixture of acetone and trimethyl borate is introduced into the vacuum reaction chamber by part of H 2 bubbling method to provide boron source and a carbon source [16,17].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and performance of boron doped textured diamond coated tool

Chen

Xiang

Feng

et al. 2019

Surface Engineering

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Boron doped diamond (BDD) film is deposited on two types of texture cemented carbide inserts by hot filament vapour deposition (HFCVD) method. The surface morphology and composition of boron doped textured diamond (BDTD) film are characterized by scanning electron microscopy and Raman spectroscopy, respectively. And the influence of different texture shape parameters on adhesion strength and cutting performance of BDTD film tools are analysed by an indentation test and milling test, respectively. The results showed that the texture has a significant effect on grain growth and quality of the diamond film. In addition, texture can further enhance the adhesion strength of diamond film. The adhesion strength of BDTD film is better than that of BDD films. Concurrently, the boron doped groove textured diamond (BDGTD) film tool has longer tool life and a better cutting performance than the other three kinds of diamond film tools due to its suitable texture shapes.

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Diamond deposition on WC–Co substrate with amorphous SiC interlayer

Cited by 17 publications

References 23 publications

Wear behaviour of gradient-multilayer diamond coatings deposited on cemented-carbide substrates

Wear behaviour of gradient-multilayer diamond coatings deposited on cemented-carbide substrates

A New Two-Step Method for Laser Cladding of Silicon Carbide in Wc-Co Substrates

Fabrication and performance of boron doped textured diamond coated tool

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