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Journal of thermal analysis

, Volume 49, Issue 2, pp 1013–1016 | Cite as

Synthesis of nickel base alloys for use as magnetic standards

  • E. M. Gundlach
  • P. K. Gallagher
Instrumentation

Abstract

The goal of this research is to prepare a series of alloys having sharp, reproducible magnetic transitions for calibrating temperature in thermogravimetry from the magnetic transition temperature of pure cobalt (1121°C) to below room temperature.

Alloys in the Ni-Co and Ni-Cu systems were prepared by the thermal decomposition of coprecipitated oxalates in argon. The alloys were subsequently annealed under 5% hydrogen.

Magnetic transition temperatures were measured using simultaneous thermomagnetometry/differential thermal analysis. Transition temperatures were corrected using well known meltingpoint standards. Magnetic transition temperatures along with precision are reported as a function of composition.

Keywords

magnetic standards thermomagnetometry 

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References

  1. 1.
    S. D. Norem, M. J. O'Neill and A. P. Gray, Thermochim. Acta, 1 (1970) 29.CrossRefGoogle Scholar
  2. 2.
    P. D. Garn, O. Menis and H. G. Wiedemann, Thermal Analysis, Vol. 1, H. G. Wiedemann (Ed.), Birkhauser Verlag, Basel 1980, p. 201.Google Scholar
  3. 3.
    P. K. Gallagher, Z. Zhong, E. L. Charsley, S. A. Mikkail, M. Todoki, K. Taniguahi and R. L. Blaine, J. Thermal Anal., 40 (1993) 1423.CrossRefGoogle Scholar
  4. 4.
    B. J. Weddle, S. A. Robbins and P. K. Gallagher, Pure Appl. Chem., 67 (1995) 1843.CrossRefGoogle Scholar
  5. 5.
    H. Preston-Thomas, Metrologia, 27 (1990) 3.CrossRefGoogle Scholar
  6. 6.
    J. Orehotski and K. Schroder, Phys. Cond. Matter, 17 (1974) 37.CrossRefGoogle Scholar
  7. 7.
    T. B. Massalski (Ed.), Binary Alloy Phase Diagrams, Vol. 1, ASM, Metals Park, OH, 1990, pp. 782–3.Google Scholar
  8. 8.
    P. K. Gallagher, P. T. Chao, L. Zhong and J. Subramanian, J. Thermal Anal., 39 (1993) 975.Google Scholar
  9. 9.
    P. K. Gallagher and D. A. Fleming, Chem. Mater., 1 (1989) 659.CrossRefGoogle Scholar
  10. 10.
    P. K. Gallagher, H. M. O'Bryan, F. Schrey and F. R. Monforte, Bull. Am. Ceram. Soc., 48 (1969) 1053.Google Scholar

Copyright information

© Akadémiai Kiadó 1997

Authors and Affiliations

  • E. M. Gundlach
    • 1
  • P. K. Gallagher
    • 1
  1. 1.Departments of Chemistry and Materials Science and EngineeringThe Ohio State UniversityColumbusUSA

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