Metallurgical Transactions

, Volume 1, Issue 9, pp 2565–2568 | Cite as

The Fe−Ho binary system

  • G. J. Roe
  • T. J. O’Keefe
Alloy Phases and Structure


The Fe−Ho phase diagram was determined on the basis of data obtained by X-ray diffraction, metallographic and differential thermal analysis techniques. Since emphasis was centered in the region where intermetallic compounds predominate, neither the iron nor holmium terminal regions were included in this study. Eutectic reactions were found to occur at 16.5 wt pct Fe and 875° C, 61 wt pct Fe and 1284° C, and 79 wt pct Fe and 1338° C. The congruent melting points of the compounds Ho6Fe23 and Ho2Fe17 were found to be 1332° and 1343° C, respectively. Two other intermetallic compounds were found, HoFe2 and HoFe3, and had peritectic decomposition temperatures of 1288° and 1293° C, respectively.


Holmium HoFe3 Tantalum Foil Congruent Melting Point Differential Thermal Analysis Technique 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    K. A. Gschneidner, Jr.:Rare Earth Alloys, D. Van Nostrand Co., Princeton, N. J., 1961.Google Scholar
  2. 2.
    F. H. Spedding and A. H. Daane:The Rare Earths, John Wiley & Sons, New York, 1961.Google Scholar
  3. 3.
    R. Vogel:Z. Anorg. Allgem. Chem., 1917, vol. 99, p. 25.CrossRefGoogle Scholar
  4. 4.
    J. O. Jepson and P. Duwez:Trans. ASM, 1955, vol. 47, p. 543.Google Scholar
  5. 5.
    R. F. Domagala, J. J. Rausch, and D. W. Levinson:Trans. ASM, 1961, vol. 53, p. 137.Google Scholar
  6. 6.
    M. I. Copeland, M. Krug, C. E. Armantrout, and H. Kato: U. S. Bur. Mines Rept. Invest., No. 5925, 1962.Google Scholar
  7. 7.
    E. M. Savitskii, V. F. Terekhava, I. V. Burov, and O. D. Khristyakov:Z. Neorgan. Khim., 1961, vol. 6, p. 1732.Google Scholar
  8. 8.
    V. F. Terekhova, E. V. Moslova and E. M. Savitskii:Izv. Akad. Nauk SSSR, Metally, 1965, vol. 3, p. 128.Google Scholar
  9. 9.
    A. Meyer:J. Less-Common Metals, 1969, vol. 18, p. 41.CrossRefGoogle Scholar
  10. 10.
    K. H. J. Buschow and A. S. Van Der Goot:Phys. Stat. Sol., 1969, vol. 35, p. 515.CrossRefGoogle Scholar
  11. 11.
    H. G. Wiedemann:Chem. Ing. Tech., 1964, vol. 36, p. 1105.CrossRefGoogle Scholar
  12. 12.
    W. Jeitschko and E. Parthé:A Fortran IV Program for the Intensity Calculation of Powder Patterns, Univ. of Pennsylvania, Laboratory for Research on the Structure of Matter, ca. 1965.Google Scholar
  13. 13.
    T. J. O’Keefe, G. J. Roe, and W. J. James:J. Less-Common Metals, 1968, vol. 15, p. 357.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society - ASM International - The Materials Information Society 1970

Authors and Affiliations

  • G. J. Roe
    • 1
  • T. J. O’Keefe
    • 2
    • 3
  1. 1.Homer Research LaboratoriesBethlehem Steel Corp.Bethlehem
  2. 2.Department of MetallurgyUniversity of Missouri-RollaRollaUSA
  3. 3.Senior Investigator (Materials) GCMSUniversity of Missouri-RollaRollaUSA

Personalised recommendations