Abstract
Titanium nitride coated powders were prepared by rotary powder bed chemical vapour deposition (CVD) in which a powder in a rotary specimen cell was heated by infrared radiation in a reactant gas stream. Titanium powder covered with TiN or Ti2N thin film was obtained by diffusion coating treatment of titanium particles (grain size 10 to 50 µm) at 900 to 1000°C and 0.5 to 1.0 atm for 60 min in a nitrogen stream. TiN was coated on to the surface of scaly graphite particles (grain size 30 to 100 µm or 100 to 1000 µm) as well as titanium particles by CVD in the reactant system TiCl4-N2-H2 at 900° C and 1 atm for 40 min. The uniformity of the coating (composition and film thickness) and the dispersability of the coated particles were considerably promoted by rotating the powder bed at about 90 r.p.m. compared with nonrotary powder bed CVD.
Similar content being viewed by others
References
D. Hull, “An Introduction to Composite Materials” (Cambridge University Press, Cambridge, 1981) p. 1.
J. M. Blocher Jr,J. Vac. Sci. Technol. 11 (1974) 680.
C. F. Powell, J. H. Oxley andJ. M. Blocher Jr, “Vapor Deposition” (Wiley, New York, 1966) p. 12.
R. W. Kidd, M. F. Browning andJ. M. Rusin, in Proceedings of 7th International Conference on CVD (Electrochemical Society, Inc., Princeton, 1979) p. 563.
C. M. Hollabaugh, R. D. Reiswig, L. A. Wahman andR. W. White,J. Nucl. Mater. 57 (1975) 325.
P. Wagner, L. A. Wahman, R. W. White, C. M. Hollabauch andR. D. Reiswig,ibid. 62 (1976) 221.
C. E. Hamrin Jr andE. M. Foster, in Proceedings of Conference on CVD of Refractory Metals, Alloys and Compounds (American Nuclear Society, Inc., Hinsdale, 1967) p. 243.
G. Hsu, R. Hogle, N. Rohatgi andA. Morrison,J. Electrochem. Soc. 131 (1984) 660.
C. L. Yaws andG. F. Wakefield,Ceram. Bull. 51 (1972) 857.
K. Sugiyama, K. Kinbara andK. Sugiyama,Thin Solid Films 112 (1984) 357.
H. Itoh, K. Kato andK. Sugiyama,J. Mater. Sci. 21 (1986) 751.
G. V. Samsonov andA. P. Epik, “Coating of High-Temperature Materials”, Part 1 (Plenum, New York, 1966), p. 1.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Itoh, H., Watanabe, N. & Naka, S. Preparation of titanium nitride coated powders by rotary powder bed chemical vapour deposition. J Mater Sci 23, 43–47 (1988). https://doi.org/10.1007/BF01174032
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01174032