Soviet Powder Metallurgy and Metal Ceramics

, Volume 14, Issue 10, pp 817–821 | Cite as

Structure of alloys and the phase equilibrium diagram of the system Hf-Mo-C

IV. Crystallization pattern of alloys of the partial system Mo-HfC-C
  • V. N. Eremenko
  • S. V. Shabanova
  • T. Ya. Velikanova
  • O. M. Tolstikov
  • G. M. Aksel'rod
  • L. A. Petrenko
Test Methods and Properties of Materials
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Conclusions

  1. 1.

    It is shown that the minimum initial melting temperature of alloys of the partial system Mo-HfC-C, 2120±2120°C, is linked with a four-phase invariant equilibrium of the congruent type, L=δ+β1+γ.

     
  2. 2.

    The curve of simultaneous crystallization of solid solutions of the cubic carbides (Hf, Mo) C1−x and graphite descends from 3150°C for the system Hf-C to 2560°C for the system Mo-C. The characteristic eutectic (δ+C) structure is not observed near the Mo-C side.

     
  3. 3.

    To determine conclusively the paths of crystallization in the region of compositions with more than 36 at.% of carbon and less than 6 at.% of hafnium, further high-temperature investigation by direct methods will be needed.

     

Keywords

Crystallization Graphite Carbide Solid Solution Melting Temperature 

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Literature cited

  1. 1.
    V. N. Eremenko, S. V. Shabanova, T. Ya. Velikanova, et al., Poroshkovaya Met., No. 9 (1975).Google Scholar
  2. 2.
    D. A. Petrov, Ternary Systems [in Russian], Izd-vo AN SSSR, Moscow (1953).Google Scholar
  3. 3.
    T. Ya. Velikanova, Summary of Candidate's Dissertation, Kiev (1968).Google Scholar
  4. 4.
    E. Rudy, St. Windisch, A. J. Stosick, and J. R. Hoffman, Trans. Met. Soc. A. I. M. E.,239, 1247 (1967).Google Scholar

Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • V. N. Eremenko
    • 1
  • S. V. Shabanova
    • 1
  • T. Ya. Velikanova
    • 1
  • O. M. Tolstikov
    • 1
  • G. M. Aksel'rod
    • 1
  • L. A. Petrenko
    • 1
  1. 1.Institute of Materials ScienceAcademy of Sciences of the Ukrainian SSRUkraine

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