Large Area Deposition of Polycrystalline Diamond Coatings by Microwave Plasma CVD

Mallik, Asok K.; Bysakh, Sandip; Pal, Kalyan Sundar; Dandapat, Nandadulal; Guha, B. K.; Datta, Someswar; Basu, Debabrata

doi:10.1080/0371750x.2013.870768

Cited by 20 publications

(19 citation statements)

References 15 publications

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“…Chemical wet etching was done for the W11 diamond coating to remove the base substrate for getting the free standing diamond coating. Silicon base substrate was etched out by using hydrofluoric acid (HF), nitric acid (HNO 3 ) and acetic acid (CH 3 COOH) in the 1:1:1 volume ratio [37]. Thus, four different PCD surfaces were created to test the tribological behaviour against alumina ceramic balls.…”

Section: Processing Of Pcd Coatingsmentioning

confidence: 99%

Severe wear behaviour of alumina balls sliding against diamond ceramic coatings

et al. 2016

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At present alumina is the most widely used bio-ceramic material for implants. However, diamond surface offers very good solid lubricant for different machinery, equipment including biomedical implants (hip implants, knee implants, etc.), since the coefficient of friction (COF) of diamond is lower than alumina. In this tribological study, alumina ball was chosen as the counter body material to show better performance of the polycrystalline diamond (PCD) coatings in biomedical load-bearing applications. Wear and friction data were recorded for microwave plasma chemical vapour deposition (MWCVD) grown PCD coatings of four different types, out of which two samples were as-deposited coatings, one was chemo-mechanically polished and the other diamond sample was made free standing by wet-chemical etching of the silicon wafer. The coefficient of friction of the MWCVD grown PCD against Al 2 O 3 ball under dry ambient condition was found in the range of 0.29-0.7, but in the presence of simulated body fluid, the COF reduces significantly, in the range of 0.03-0.36. The samples were then characterized by Raman spectroscopy for their quality, by coherence scanning profilometer for surface roughness and by electron microscopy for their microstructural properties. Alumina balls worn out (14.2 × 10 −1 mm 3 ) very rapidly with zero wear for diamond ceramic coatings. Since the generation of wear particle is the main problem for load-bearing prosthetic joints, it was concluded that the PCD material can potentially replace existing alumina bio-ceramic for their better tribological properties.

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Section: Processing Of Pcd Coatingsmentioning

confidence: 99%

Severe wear behaviour of alumina balls sliding against diamond ceramic coatings

et al. 2016

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“…Polycrystalline diamond samples were fabricated with CSIR-CGCRI based DT1800 microwave plasma enhanced CVD (MPCVD) reactor on single crystal Si Polycrystalline Diamond Characterisations for High End Technologies DOI: http://dx.doi.org/10.5772/intechopen.85428 wafers [115]. Deposition was carried out for 4-10 days to grow 0.5-0.8 mm thick diamond coatings.…”

Section: Processing Of Polycrystalline Diamond (Pcd)mentioning

confidence: 99%

Some Aspects of Diamonds in Scientific Research and High Technology

Lipatov¹

2020

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The electrical properties of diamond are significantly affected by the charge of the surface states of the sample. Depending on the type of chemisorbed elements, the electronic affinity of the diamond surface is changeable [36, 37]. The detection of negative electron affinity of the diamond surface (downward bending of zones, the absence of a potential barrier) determined the studies on the creation of cold cathodes and electron emitters based on diamond coatings [38].Due to the strong covalent bonds, diamond is a chemically inert material and is suitable for medical and biotechnological applications [10]. In this case, such diamond properties as low cost of nanoparticles, the possibility of surface activation by photochemical methods, high photoluminescence yield and its resistance to photobleaching, low cytotoxicity, and, as a consequence, environmental safety are used.The collection of scientific chapters proposed to the reader reflects some of the aspects, mentioned above. This collection will be useful to students, graduate students, and researchers who are interested in such disciplines as the synthesis of carbon and superhard materials, carbon electronics and photonics, surface chemistry, etc.

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“…Polycrystalline diamond samples were fabricated with CSIR-CGCRI based DT1800 microwave plasma enhanced CVD (MPCVD) reactor on single crystal Si wafers [115]. Deposition was carried out for 4-10 days to grow 0.5-0.8 mm thick diamond coatings.…”

Section: Processing Of Polycrystalline Diamond (Pcd)mentioning

confidence: 99%

Polycrystalline Diamond Characterisations for High End Technologies

Mallik¹

2020

Some Aspects of Diamonds in Scientific Research and High Technology

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Characterisations of polycrystalline diamond (PCD) coatings have routinely been done over the past three decades of diamond research, but there is less number of reports on some of its very unique properties. For example, diamond is the hardest known material and, in probing such hard surfaces with any indenter tip, it may lead to damage of the instrument. Due to such chances of experimental accidents, researchers have performed very few attempts in evaluating the mechanical properties of PCDs. In the present work, some of these very special properties of diamond that are less reported in the literature are being re-investigated. PCDs were characterised by photoluminescence (PL), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscope (TEM), and X-ray diffraction (XRD) techniques. The diamond surface was also polished to bring the as-grown micron level of surface roughness (detrimental for wear application) down to few hundreds of nanometer. The tribological properties of such polished and smooth surfaces were found to be appropriate for wear protective coating application. This chapter revisits some of the unreported issues in the synthesis and characterisation of PCD coatings grown on Si wafer by the innovative 915 MHz microwave plasma chemical vapour deposition (MPCVD) technique.

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Large Area Deposition of Polycrystalline Diamond Coatings by Microwave Plasma CVD

Cited by 20 publications

References 15 publications

Severe wear behaviour of alumina balls sliding against diamond ceramic coatings

Severe wear behaviour of alumina balls sliding against diamond ceramic coatings

Some Aspects of Diamonds in Scientific Research and High Technology

Polycrystalline Diamond Characterisations for High End Technologies

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