Adhesion improvement of diamond coatings on cemented carbide with high cobalt content using PVD interlayer

Xu, Feng; Xu, Jiang; Yuen, Muk-Fung; Zheng, Lixuan; Lu, Wen Zhuang; Zuo, Dunwen

doi:10.1016/j.diamond.2013.01.012

Cited by 61 publications

(14 citation statements)

References 13 publications

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“…The nucleation density was calculated by counting the total number of diamond nuclei divided by the occupied surface area. At pH 2.2, the nucleation density was calculated to be 1.0 ± 0.1 × 10 10 cm -2 , which is two orders of magnitude higher than on bare WC-Co substrates [23], one order of magnitude higher than on W interlayer [24], and a little bit higher than applying plasma bias voltage [9]. At higher pH, the nucleation density is lower, but some larger particles were observed (see Figure 3b).…”

Section: Resultsmentioning

confidence: 89%

Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

Wang¹,

Handschuh‐Wang²,

Jiang³

et al. 2016

Proceedings of the 3rd International Conference on Material Engineering and Application (ICMEA 2016)

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Abstract. Nanodiamond seeding is a well-established approach to enhance the nucleation density in chemical vapor deposition (CVD) diamond growth. However, nanodiamond seeding is highly dependent on the properties of nanodiamond particles, the solvent and the substrate. In this work we present a simple electrostatic self-assembly method to enhance the nucleation of diamond film on cemented carbide (WC-Co) substrates. The nanodiamond particles were adsorbed to WC-Co substrate surfaces governed by electrostatic interactions, which can be controlled by the surface groups of the particles and the pH of a solvent. By varying the pH of the media, the nanodiamond particles were rendered either positively or negatively charged. The positive charged nanodiamond particles (pH < 2.5) enhanced the nucleation of diamond on oxidized WC-Co substrates. The highest nucleation density of diamond on WC-Co substrates was achieved to be 1.0 ± 0.1 × 10 10 cm -2 , which is comparable to the highest record achieved by applying bias voltage to generate plasma. The nanodiamond particles also shortened the incubation time of diamond nucleation to less than 10 min on TiB 2 interlayer. This electrostatic induced adsorption of diamond nanoparticles is crucial for the development of ultra-high nucleation densities for the growth of high performance nanocrystalline diamond films, especially for micro sized tools with sharp cutting edges applying for Micro and Nano Electro-Mechanical Systems.

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Section: Resultsmentioning

confidence: 89%

Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

Wang¹,

Handschuh‐Wang²,

Jiang³

et al. 2016

Proceedings of the 3rd International Conference on Material Engineering and Application (ICMEA 2016)

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“…By selecting suitable interlayers, the adverse effect of Fe can be avoided and the adhesion of diamond film will be stronger. There were dozens of interlayers reported [7][8][9][10][11] . But none of them was used in industrial scale production [12] because these interlayers can not achieve effective mechanical and thermal transition between diamond and steel [13] .…”

Section: Introductionmentioning

confidence: 97%

Microstructure evolution of thermal spray WC–Co interlayer during hot filament chemical vapor deposition of diamond thin films

Yang

Wei

et al. 2015

Journal of Alloys and Compounds

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“…It is recognized that the adhesion is related to the residual stress [22], and it is indeed proved that the integral wear behavior and the working lifetime of several diamond coated components are obviously affected by the adhesion [23,24], especially for the WC-Co substrate, because the Co can promote the graphitization and apparently deteriorate the adhesion [25]. Some pretreatment techniques and deposition methods are proposed to enhance the adhesion, such as the alkali-acid pretreatment, microwave oxidation, energy ion irradiation, ion implantation and interlayers [26][27][28][29], which however can either cause voids generating or require more complex techniques. In addition, the boron-doped diamond (BDD) film can well adhere to the WC-Co and SiC substrates and perform much better wear behavior and elongated working lifetime [23,24,30,31].…”

Section: Introductionmentioning

confidence: 99%

Approach for Polishing Diamond Coated Complicated Cutting Tool: Abrasive Flow Machining (AFM)

Wang

et al. 2018

Chin. J. Mech. Eng.

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Lower surface roughness and sharper cutting edge are beneficial for improving the machining quality of the cutting tool, while coatings often deteriorate them. Focusing on the diamond coated WC-Co milling cutter, the abrasive flow machining (AFM) is selected for reducing the surface roughness and sharpening the cutting edge. Comparative cutting tests are conducted on different types of coated cutters before and after AFM, as well as uncoated WC-Co one, demonstrating that the boron-doped microcrystalline and undoped fine-grained composite diamond coated cutter after the AFM (AFM-BDM-UFGCD) is a good choice for the finish milling of the 6063 Al alloy in the present case, because it shows favorable machining quality close to the uncoated one, but much prolonged tool lifetime. Besides, compared with the micro-sized diamond films, it is much more convenient and efficient to finish the BDM-UFGCD coated cutter covered by nano-sized diamond grains, and resharpen its cutting edge by the AFM, owing to the lower initial surface roughness and hardness. Moreover, the boron incorporation and micro-sized grains in the underlying layer can enhance the film-substrate adhesion, avoid the rapid film removal in the machining process, and thus maximize the tool life (1040 m, four times more than the uncoated one). In general, the AFM is firstly proposed and discussed for post-processing the diamond coated complicated cutting tools, which is proved to be feasible for improving the cutting performance

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Adhesion improvement of diamond coatings on cemented carbide with high cobalt content using PVD interlayer

Cited by 61 publications

References 13 publications

Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

Enhanced Diamond Nucleation on Cemented Carbide Cutting Tools by Employing Electrostatic Self-Assembly Seeding

Microstructure evolution of thermal spray WC–Co interlayer during hot filament chemical vapor deposition of diamond thin films

Approach for Polishing Diamond Coated Complicated Cutting Tool: Abrasive Flow Machining (AFM)

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