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

Abstract:

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.

• Periodical: Materials Science Forum (Volumes 660-661)
• Pages: 391-396
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.660-661.391
• Online since: October 2010
• Authors: N.A. Braga, Carlos Alberto Alves Cairo, N.G. Ferreira, M.R. Baldan, Vladimir J. Trava-Airoldi
• Keywords: Nanodiamond, Porous Titanium, Powder Metallurgy (PM)

References

[1] S. Bhowmik, H.W. Bonin, V.T. Bui and R.D. Weir: Int. J. Adhes. Adhes. Vol. 26 (2006), p.400.

[2] G. Ryan, A. Pandit and D.P. Apatsidis: Biomaterials Vol. 27 (2006), p.2651.

[3] M.R. Bache: Int. J. of Fatigue Vol. 25, (2003), p.1079.

[4] F.H. Froes, D. Eylon and G. Friedman, in: ASM Handbook, edited by W.B. Eisen, B.L. Ferguson, R.M. German, R. Lacocca, P.W. Lee, D. Madan, K. Moyer, H. Sanderow and Y. Trudel, volume 11 of Powder Metal Technologies and Applications, chapter, 7, ASM International Publishers (1998).

[5] N.A. Braga, C.A.A. Cairo, F. Piorino Neto, M.R. Baldan and N.G. Ferreira: Mater. Sci. Forum Vol. 591-593 (2008), p.289.

[6] I. H. Oh, N. Nomura, N. Masahashi and N. Hanada: Scr. Mater. Vol. 49 (2003), p.1197.

[7] M. Bram, C. Stiller, H.P. Buchkremer, D. Stover and H. Baur: Adv. Eng. Mater. Vol. 2 (2000), p.196.

[8] R. Ricceri, F. Arcuri and P. Matteazzi: J. Phys. IV France Vol. 11 (2001), p.51.

[9] I.H. Oh, H. Segawa, N. Nomura and S. Hanada: Mater. Trans. Vol. 44 (2003), p.657.

[10] I.H. Oh, N. Nomura and S. Hanada: Mater. Trans. Vol. 43 (2002), p.443.

[11] S.J. Askari, F. Akhtar, G.C. Chen, Q. He, F.Y. Wang, X.M. Meng et al.: Mater. Lett. Vol. 61 (2007), p.2139.

[12] Y.Q. Fu, B.B. Yan, N.L. Loh, C.Q. Sun and P. Hing: J. Mater. Sci. Vol 34 (1999), p.2269.

[13] D.S. Knight and W.B. White: J. Mater. Reser. Vol. 4 (1989), p.385.

[14] P.K. Chu and L. Li: Mater. Chem. Phys. Vol. 96 (2006), p.253.

[15] A.C. Ferrari and J. Robertson: Phys. Rev. B Vol. 64 (2001), p.075414.

[16] N. Woehrl and V. Buck: Diam. Relat. Mater. Vol. 16 (2007), p.748.