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Determination of phase relations in the Co–Cu–Ti system by the diffusion triple technique

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Abstract

Two isothermal sections of the Co–Cu–Ti ternary system at 973 and 1123 K were experimentally determined using the diffusion triple technique together with scanning electron microscopy and electron probe microanalysis. The solubility of Cu (substituting Co) in CoTi increased from 22.8 at.% at 973 K to 28.1 at.% at 1123 K while that of Co (substituting Cu) in CuTi decreased from 11.1 to 8.8 at.% accordingly. In addition, the solubility limits of the third element in the binary compounds CoTi2, CuTi2, Cu4Ti3, and Cu3Ti2 were remarkable. Besides the solubility change, we found the Cu2Ti phase was stable at 1123 K but disappeared at 973 K. A ternary compound “m” with a composition range covering Co10Cu57Ti33 was detected at both isothermal sections. An invariant reaction Cu4Ti3 + CoTi ↔ CuTi + m at a temperature between 973 and 1023 K was deduced. Further investigations are necessary to confirm the reactions among Cu, Cu4Ti, Cu2Ti, Cu3Ti2, and “m” between 1023 and 1123 K.

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References

  1. T. Nishizawa, K. Ishida: The Co–Cu (cobalt–copper) system. Bull. Alloy Phase Diagram 5, 161 (1984).

    Article  CAS  Google Scholar 

  2. J.L. Murray: The Co-Ti (cobalt-titanium) system, in Phase Diagram of Binary Titanium Alloys, edited by J.L. Murray (ASM International, Materials Park, OH, 1987), p. 59.

  3. J.L. Murray: The Cu–Ti (copper–titanium) system, in Phase Diagram of Binary Titanium Alloys, edited by J.L. Murray (ASM International, Materials Park, OH, 1987), p. 80.

  4. H. Okamoto: Comment on Ca–Fe (calcium–iron). J. Phase Equilib. 15, 565 (1994).

    Article  Google Scholar 

  5. H.U. Pfeifer, S. Bhan, K. Schubert: On the constitution of the system titanium-nickel-copper and some quasi-homologous alloys Ti–V–Ni, Ti–Co–Cu, and V–Fe–Ni. J. Less-Common Met. 14, 291 (1968).

    Article  CAS  Google Scholar 

  6. Y.M. Wang, H.S. Liu, Q. Chen, F. Zheng, Z.P. Jin: The isothermal section at 923 K of the Co–Cu–Ti ternary system measured by using diffusion triple. J. Alloys Compd. (2006, in press).

    Google Scholar 

  7. Y.M. Wang, H.S. Liu, F. Zheng, Q. Chen, Z.P. Jin: The 1023 K isothermal section of Co–Cu-Ti ternary system measured by diffusion triple technique. Mater. Sci. Eng., A 431, 184 (2006).

    Article  Google Scholar 

  8. Z.P. Jin: A study of the range of stability of σ phase in some ternary systems. Scand. J. Metall. 10, 279 (1981).

    Google Scholar 

  9. J.C. Zhao, Z.P. Jin: Determination of phase equilibria in the Ti–Fe–Co system at 900 °C. Z. Metallkde. 81, 247 (1990).

    CAS  Google Scholar 

  10. Z.P. Jin, C. Qiu: An experimental study and thermodynamic evaluation of the Fe–Mo–Ti system at 1000 °C. Metall. Mater. Trans. A 24A, 2137 (1993).

    Article  CAS  Google Scholar 

  11. X.G. Lu, Y.W. Cui, Z.P. Jin: Experimental and thermodynamic investigation of the Ni–Al–Mo system. Metall. Mater. Trans. A. 30A, 1785 (1999).

    Article  CAS  Google Scholar 

  12. W.A. Soffa, D.E. Laughlin: High-strength age hardening copper–titanium alloys: Redivivus. Prog. Mater. Sci. 49, 347 (2004).

    Article  CAS  Google Scholar 

  13. V.N. Eremenko, Yu.I. Buyanov, S.B. Prima: Phase diagram of the system titanium-copper. Poroshk. Metall. 20, 494 (1966).

    Google Scholar 

  14. H.H. Xu, Y. Du, B.Y. Huang, S.H. Liu: Phase equilibria of the Cu–Nb–Ti system at 850 °C. J. Alloys Compd. 399, 92 (2005).

    Article  CAS  Google Scholar 

  15. K.P. Gupta: The Cu–Ni–Ti system, in Phase Diagrams of Ternary Nickel Alloys Indian Institute of Metals, Calcutta, India, 1990, p. 228.

    Google Scholar 

  16. P. Canale, C. Servant: Thermodynamic assessment of the Cu–Ti system taking into account the new stable phase CuTi3. Z. Metallkde. 93, 273 (2002).

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, People’s Republic of China

    H. S. Liu, Y. M. Wang & L. G. Zhang

  2. Thermo-Calc Software AB, SE–113 47, Stockholm, pSweden

    Q. Chen

  3. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, People’s Republic of China

    F. Zheng & Z. P. Jin

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  1. H. S. Liu
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  2. Y. M. Wang
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  3. L. G. Zhang
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  4. Q. Chen
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  5. F. Zheng
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  6. Z. P. Jin
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Correspondence to H. S. Liu.

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Liu, H.S., Wang, Y.M., Zhang, L.G. et al. Determination of phase relations in the Co–Cu–Ti system by the diffusion triple technique. Journal of Materials Research 21, 2493–2503 (2006). https://doi.org/10.1557/jmr.2006.0304

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  • DOI: https://doi.org/10.1557/jmr.2006.0304

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