Effect of pretreatment methods and chamber pressure on morphology, quality and adhesion of HFCVD diamond coating on cemented carbide inserts

Sarangi, Sunil; Chattopadhyay, Angshuman

doi:10.1016/j.apsusc.2007.10.104

Cited by 53 publications

(21 citation statements)

References 25 publications

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“…First order Raman peak shift towards higher side centered at 1333 cm −1 is indicative of the presence of residual compressive stress in both NCD and MCD coatings. Mainly, this compressive residual stress is due to the difference in thermal expansion coefficients between the substrate and coating [32][33][34][35]. Figures 3, a, 3, b and 3, c show the Raman spectrum of NCD, MCD and boron-doped CVD coatings.…”

Section: Raman Spectroscopy and Residual Stress Analysismentioning

confidence: 99%

Tribological Performance of Titanium Alloy Ti–6Al–4V via CVD–diamond Coatings

Din

Shah

Sheikh

2018

J. Superhard Mater.

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In the present study, HFCVD nanocrystalline, microcrystalline and boron-doped nanocrystalline diamond coatings have been deposited on titanium alloy. The effect of boron doping on coefficient of friction and residual stresses of diamond coatings have been studied. The tribological characteristics of the aforementioned three coatings on Ti-6Al-4V substrates were studied using ball on disc microtribometer, the thickness of the coatings being 3 μm. The coated Ti-6Al-4V discs were slid against alumina (Al 2 O 3 ) balls with normal load ranging from 1 to 10 N. The borondoped NCD coated sample disc was found to possess the lowest average coefficient of friction ~ 0.0804 while the undoped NCD and MCD coated sample discs were found to possess the average coefficients of friction of ~ 0.143 and ~ 0.283, respectively. Raman spectroscopy studies revealed that the residual stresses in boron-doped nanocrystalline coatings were tensile in nature, while the residual stresses in undoped NCD and MCD were found to be of compressive nature.

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Section: Raman Spectroscopy and Residual Stress Analysismentioning

confidence: 99%

Tribological Performance of Titanium Alloy Ti–6Al–4V via CVD–diamond Coatings

Din

Shah

Sheikh

2018

J. Superhard Mater.

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“…To exploit these properties for engineering applications many techniques have been developed in the last three decades to deposit diamond films on engineering components. Hot filament assisted chemical vapour deposition technique (Kama et al 1983;Wang et al 2003;Sarangi et al 2008;Amorim et al 2009) is a relatively cheap low temperature process.…”

Section: Introductionmentioning

confidence: 99%

Effect of substrate roughness on growth of diamond by hot filament CVD

et al. 2010

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Polycrystalline diamond coatings are grown on Si (100) substrate by hot filament CVD technique. We investigate here the effect of substrate roughening on the substrate temperature and methane concentration required to maintain high quality, high growth rate and faceted morphology of the diamond coatings. It has been shown that as we increase the substrate roughness from 0⋅05 μm to 0⋅91 μm (centre line average or CLA) there is enhancement in deposited film quality (Raman peak intensity ratio of sp 3 to non-sp 3 content increases from 1⋅65 to 7⋅13) and the substrate temperature can be brought down to 640°C without any additional substrate heating. The coatings grown at adverse conditions for sp 3 deposition has cauliflower morphology with nanocrystalline grains and coatings grown under favourable sp 3 condition gives clear faceted grains.

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“…Etching with Murakami reagent (K 3 Fe (CN) 6 + KOH+H 2 O in 1:1:10 volume ratio); etching using acid solution HNO 3 : H 2 O at 1:1 ratio is very much popular in recent trends. Multiple chemical etching is also adopted by many researchers by selective acids for better results [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study of cutting force and tool wear during turning of aluminium with WC, PCD and HFCVD coated MCD tools

et al. 2020

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Enormous developmental work has been made in synthesis of metastable diamond by hot filament chemical vapor deposition (HFCVD) method. In this paper, micro-crystalline diamond (MCD) was deposited on WC–6 wt.% Co cutting tool inserts by HFCVD technique. The MCD coated tool was characterized by the scanning electron microscope (SEM), X-ray diffraction (XRD) and micro Raman spectroscopy (μ-RS). A comparison was made among the MCD tool, uncoated tungsten carbide (WC) tool and polycrystalline diamond (PCD) tool during the dry turning of rolled aluminum. The various major tests were conducted such as surface roughness, cutting force and tool wear, which were taken into consideration to establish a proper comparison among the advanced cutting tools. Surface roughness was measured during machining by Talysurf. The tool wear was studied by SEM after machining. The cutting forces were measured by Kistler 3D-dynamometer during the machining process. The test results indicate that, the CVD coated MCD tool and PCD tool produced almost similar results. But, the price of PCD tools are five times costlier than MCD tools. So, MCD tool would be a better alternative for machining of aluminium.

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Effect of pretreatment methods and chamber pressure on morphology, quality and adhesion of HFCVD diamond coating on cemented carbide inserts

Cited by 53 publications

References 25 publications

Tribological Performance of Titanium Alloy Ti–6Al–4V via CVD–diamond Coatings

Tribological Performance of Titanium Alloy Ti–6Al–4V via CVD–diamond Coatings

Effect of substrate roughness on growth of diamond by hot filament CVD

Study of cutting force and tool wear during turning of aluminium with WC, PCD and HFCVD coated MCD tools

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