caa a22 4500 38802299X CHVBK 20180307124929.0 cr unu---uuuuu 161130e199805 xx s 000 0 eng 10.1557/JMR.1998.0157 doi S0884291400043946 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0157 Coalesced oriented diamond films on nickel [Elektronische Daten] The growth of coalesced, highly oriented diamond films has been achieved on nickel substrates using a multistep process that consisted of (i) seeding the Ni surface with 0.5 μm diamond powder, (ii) annealing at 1100 °C in a hydrogen atmosphere, and (iii) growth at 900 °C in a mixture of hydrogen and 0.5% methane. Auger depth profile analysis of a sample quenched after the annealing stage showed the presence of significant amounts of carbon (6 at. %) close to the substrate surface and about 3 at.% deeper in the substrate. The loss of carbon into the substrate resulted in relatively low nucleation density. The addition of methane into the gas phase during the annealing stage proved very effective in compensating for the diffusion. An addition of 0.5% methane in the gas phase produced optimum results, as the nucleation density, orientation of diamond particles, and uniformity were substantially improved. Substrates nucleated under these conditions were grown out into coalesced, 30 μm thick films. Both (100) and (111) oriented films showed a high degree of orientation and Raman spectra obtained from these orientations showed intense and narrow diamond signature peaks with FWHM's of 5 and 8 cm-1, respectively. Copyright © Materials Research Society 1998 Yang P. C. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 Wolden C. A. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 Liu W. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 Schlesser R. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 Davis R. F. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 Prater J. T. Research Office, RTP, North Carolina 27709 Sitar Z. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 Journal of Materials Research Cambridge University Press 13/5(1998-05), 1120-1123 0884-2914 13:5<1120 1998 13 JMR https://doi.org/10.1557/JMR.1998.0157 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0157 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yang P. C. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 NATIONALLICENCE 700 1- Wolden C. A. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 NATIONALLICENCE 700 1- Liu W. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 NATIONALLICENCE 700 1- Schlesser R. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 NATIONALLICENCE 700 1- Davis R. F. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 NATIONALLICENCE 700 1- Prater J. T. Research Office, RTP, North Carolina 27709 NATIONALLICENCE 700 1- Sitar Z. Department of Materials Science and Engineering, NCSU, Raleigh, North Carolina 27695-7919 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/5(1998-05), 1120-1123 0884-2914 13:5<1120 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge