Porous 3-D Titanium Substrates Obtained by Powder Metallurgy for Nanodiamond Film Growth

Abstract:

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Power metallurgy has been used to produce compacts by two different routes. In this work, porous three-dimensional (3-D) substrates were prepared by the conventional pre-forms sintering method. Titanium powders were uniaxial pressed at 110 Mpa and vacuum (1 x 10-5 Pa) sintered at 1500 K. Another group of substrates were obtained by the space holder technique. Irregular shaped carbamide particles (210 – 250 m diameters) were mixed to Ti powders, pressed and sintered. Before the sintering the compacts were heated at 470 K for 3 h to eliminate the spacing holder agent. Nanodiamond films were grown by hot-filament chemical vapor deposition technique on such substrates at 870 K from a mixture of Ar/H2 (80%-18,5%) respectively and a solid carbon source. SEM images show the substrates totally covered by a nanodiamond film including deeper planes. Raman Spectra confirm the good quality of the nanodiamond film.

Info:

Periodical:

Materials Science Forum (Volumes 660-661)

Edited by:

Lucio Salgado and Francisco Ambrozio Filho

Pages:

391-396

DOI:

10.4028/www.scientific.net/MSF.660-661.391

Citation:

N.A. Braga et al., "Porous 3-D Titanium Substrates Obtained by Powder Metallurgy for Nanodiamond Film Growth", Materials Science Forum, Vols. 660-661, pp. 391-396, 2010

Online since:

October 2010

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Price:

$35.00

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