characterizations of microwave plasma cvd grown polycrystalline diamond coatings for advanced technological applications
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2014
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Abstract
Polycrystalline diamond (PCD) coatings ranging from few microns to several hundred microns thickness have been grown by 915 MHz microwave plasma reactor with 9000 W power. The coatings were deposited on 100 mm diameter silicon (Si) substrate from few hours to several days of continuous runs. PCD coatings were
made freestanding by wet chemical etching technique. The deposited PCDs were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) for physical characterization and compared with authors’ earlier work. Refractive index of 2.41 was obtained at 633 nm wavelength and a maximum of 6.6 W·cm-1K-1 value for thermal conductivity could be achieved with the grown coatings. The values are well above the existing non-diamond heat spreading substrates, which makes the grown PCDs as candidates for heat spreaders in different technological applications. High refractive index along with translucent nature of the white freestanding PCDs, make them potential candidate for optical windows.
| Reference Key |
mallik2014processingcharacterizations
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| Authors | ;Awadesh Kumar Mallik;Nandadulal Dandapat;Shirshendu Chakraborty;Ashok Kumar Mandal,;Jiten Ghosh;Manju Unnikrishnan;Sandip Bysakh;Vamsi Krishna Balla |
| Journal | preventive veterinary medicine |
| Year | 2014 |
| DOI |
10.2298/PAC1402069M
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| URL | |
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