Recent Advances in the Deposition of Diamond Coatings on Co-Cemented Tungsten Carbides

Polini, Riccardo; Barletta, Massimiliano; Rubino, G.; Vesco, Silvia

doi:10.1155/2012/151629

Cited by 23 publications

(6 citation statements)

References 33 publications

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“…Electroplated nickel interlayer is explored for this purpose where adhesion between the two substances is the main issue. Common diamond coating technique, that is, chemical vapor deposition, requires high temperature in which the cobalt binder within cemented carbide favors reaction towards graphitic phase, an unexpected interlayer during diamond deposition process which leads to deleterious effect to the diamond coating [3, 4]. There is also problems related to residual stress at the interface caused by mismatch in thermal expansion coefficients between the two substances.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Electroplated Nickel Coating on Hard Metal

Wahab

Noordin

Izman

et al. 2013

The Scientific World Journal

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Electroplated nickel coating on cemented carbide is a potential pretreatment technique for providing an interlayer prior to diamond deposition on the hard metal substrate. The electroplated nickel coating is expected to be of high quality, for example, indicated by having adequate thickness and uniformity. Electroplating parameters should be set accordingly for this purpose. In this study, the gap distances between the electrodes and duration of electroplating process are the investigated variables. Their effect on the coating thickness and uniformity was analyzed and quantified using design of experiment. The nickel deposition was carried out by electroplating in a standard Watt's solution keeping other plating parameters (current: 0.1 Amp, electric potential: 1.0 V, and pH: 3.5) constant. The gap distance between anode and cathode varied at 5, 10, and 15 mm, while the plating time was 10, 20, and 30 minutes. Coating thickness was found to be proportional to the plating time and inversely proportional to the electrode gap distance, while the uniformity tends to improve at a large electrode gap. Empirical models of both coating thickness and uniformity were developed within the ranges of the gap distance and plating time settings, and an optimized solution was determined using these models.

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Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Electroplated Nickel Coating on Hard Metal

Wahab

Noordin

Izman

et al. 2013

The Scientific World Journal

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“…During the indentation process of hardness measurement, the diamond coated indenter and the un-coated indenter was allowed to indent into the surface of the samples. This method of hardness measurement allows the evaluation of the diamond coating film adhesion on the WC substrate surface (Polini et al, 2012. The evaluated average Vickers Hardness (VH) number were found to be 1457.48 HV and 964.95 HV for diamond coated substrate in addition to un-coated substrates respectively.…”

Section: Hardnessmentioning

confidence: 99%

Characterizing and Analyzing the Tribological Behaviour of Diamond Coated Tungsten Carbide (WC)

Rana¹,

R.S.²,

Murtaza³

2022

JER is an international, peer-reviewed journal that publishes f

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In this research work, the deposition of diamond coating was done on the tungsten carbide (WC) substrate utilizing the the thermal Chemical Vapour Deposition (CVD) technique. The carbon precursor used for growing the diamond on the tungsten carbide (WC) substrate material was sugarcane bagasse. The tribological properties of deposited diamond coating were studied examined in this paper. For characterization of the developed coating, Field Emission Scanning Electron Microscope (FESEM), Raman spectroscopy and X-ray diffraction (XRD), were used to characterize the developed diamond coating on the substrate material. These processes were used to confirm the presence of diamond coating on the substrate. For inspecting the hardness of the developed diamond coated and un coated samples, the tests of micro-hardness were also executed. The values of the Vickers hardness for the un-coated and the diamond coated substrates were found to be 964.95 HV to 1457.48 HV respectively. This depicted a rise of 51% in the hardness of the un-coated WC inserts. As per ASTM G-99 standards tribological behaviour of the developed coated substrate was also the scope of this work using a pin-on-disc tribometer. The tribological tests showed improvement in the wear resistance of the diamond coated WC inserts as there was a decrease in the value of wear by 57.84 %. The value of the coefficient of friction (COF) also found to be decreased by 51.48%. This paper presents a combined study of using tribological tests and morphologic study showing the advantages of coating diamond on the tungsten carbide (WC) substrate.

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“…Because of these properties, diamond has tremendous application in the field of tribology, especially as a protective coating for cutting tools. Polycrystalline diamond films are best synthesized by chemical vapour deposition (CVD) techniques (but not limited to this) [101,102]; the most common are hot filament-assisted CVD (HFCVD), direct current plasma-assisted CVD (DC PACVD), microwave plasma CVD (MPCVD) and combustion flame-assisted CVD (CFACVD) [100]. However, most of the metals and ceramics have a much higher thermal expansion coefficient than the very low one for diamond coatings.…”

Section: Diamond and Diamond-like Carbon (Dlc) Coatingsmentioning

confidence: 99%

“…Materials 2020, 13,1377 15 of 49 graphitise at temperatures above 300 °C with a further decrease of their hardness [101]. On the other hand, when the outer layer of DLC is turned to graphite when the tool is in service, both the friction and wear rates should decrease [114].…”

Section: Diamond and Diamond-like Carbon (Dlc) Coatingsmentioning

confidence: 99%

The Critical Raw Materials in Cutting Tools for Machining Applications: A Review

et al. 2020

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A variety of cutting tool materials are used for the contact mode mechanical machining of components under extreme conditions of stress, temperature and/or corrosion, including operations such as drilling, milling turning and so on. These demanding conditions impose a seriously high strain rate (an order of magnitude higher than forming), and this limits the useful life of cutting tools, especially single-point cutting tools. Tungsten carbide is the most popularly used cutting tool material, and unfortunately its main ingredients of W and Co are at high risk in terms of material supply and are listed among critical raw materials (CRMs) for EU, for which sustainable use should be addressed. This paper highlights the evolution and the trend of use of CRMs) in cutting tools for mechanical machining through a timely review. The focus of this review and its motivation was driven by the four following themes: (i) the discussion of newly emerging hybrid machining processes offering performance enhancements and longevity in terms of tool life (laser and cryogenic incorporation); (ii) the development and synthesis of new CRM substitutes to minimise the use of tungsten; (iii) the improvement of the recycling of worn tools; and (iv) the accelerated use of modelling and simulation to design long-lasting tools in the Industry-4.0 framework, circular economy and cyber secure manufacturing. It may be noted that the scope of this paper is not to represent a completely exhaustive document concerning cutting tools for mechanical processing, but to raise awareness and pave the way for innovative thinking on the use of critical materials in mechanical processing tools with the aim of developing smart, timely control strategies and mitigation measures to suppress the use of CRMs.

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Recent Advances in the Deposition of Diamond Coatings on Co-Cemented Tungsten Carbides

Cited by 23 publications

References 33 publications

Quantitative Analysis of Electroplated Nickel Coating on Hard Metal

Quantitative Analysis of Electroplated Nickel Coating on Hard Metal

Characterizing and Analyzing the Tribological Behaviour of Diamond Coated Tungsten Carbide (WC)

The Critical Raw Materials in Cutting Tools for Machining Applications: A Review

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