C-Ti (Carbon-Titanium)
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C-Ti (Carbon-Titanium) H. Okamoto [95Alb] proposed a Ti-C phase diagram (see [95Oka] lit. rev.) by thermodynamic optimization of phase boundary data obtained by [65Rud], [89Loo], and [95Alb], and thermodynamic data obtained by [95Alb]. However, [96Sei] found that the Gibbs energy description of the liquid phase used by [95Alb] is a mathematical artifact not warranted experimentally. Figure 1 shows the Ti-C phase diagram calculated by [96Sei]. The result agrees well with experimental phase boundary data reported by [53Cad], [56Wag], [59Bic], [62Bit], [65Rud], and [89Loo]. In addition to TiC in Fig. 1, an ordered phase Ti2C may exist with a maximum transformation temperature at ~1900 °C [87Mur]. Cited References 53Cad: I. Cadoff and J.P. Nielsen, Trans. Metall. Soc. AIME, 197, 248254 (1953).
56Wag: F.C. Wagner, E.J. Bucur, and M.A. Steinberg, Met. Trans. ASM, 48, 742-761 (1956). 59Bic: R.L. Bickerdike and G. Hughes, J. Less-Common Met., 1, 42-49 (1959). 62Bit: H. Bittner and H. Goretzki, Monatsh. Chem., 93, 1000-1004 (1962). 65Rud: E. Rudy, AFML-TR-65-2 Part I, Vol. IV, Air Force Materials Laboratory Research and Technology Division, Air Force Systems Command, Wright-Patterson AFB, Ohio (1963). 87Mur: J. Murray, Phase Diagrams of Binary Titanium Alloys, ASM International, Metals Park, OH, 47-51 (1987). 89Loo: F.J.J. van Loo and G.F. Bastin, Met. Trans. A, 20, 403-411 (1989). 95Alb: K. Albertsen and H.J. Schaller, Z. Metallkde., 86(5), 319-325 (1995). 95Oka: H. Okamoto, J. Phase Equilibria, 16(6), 532-533 (1996). 96Sei: H.J. Seifert, H.L. Lukas, and G. Petzow, J. Phase Equilibria, 17(1), 24-35 (1996).
Fig. 1 The Ti-C phase diagram.
Journal of Phase Equilibria Vol. 19 No. 1 1998
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