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Curie temperature in Fe(Ni)Nb based mechanically alloyed materials

  • J. J. Suñol
  • A. Gonzőlez
  • L. Escoda
  • A. Vilaró
Article

Summary

A conventional thermogravimeter has been adapted with a small magnet to detect the Curie temperature, TC. The measurements were performed in several Fe(Ni)NbB alloys developed in a nanocrystalline form by mechanical alloying. The B addition favors a slight diminution (10-20°C), and the Ni addition the existence of three transitions related with bccFe, fcc(Fe-Ni) abd fccNi-rich environments. Furthermore, complementary analysis were performed by means of differential thermal analysis, scanning electron microscopy with energy dispersive X-ray microanalysis and by induced coupled plasma. Small contamination was found. A mass increase (about 1 mass%) was detected by thermogravimetry related to oxidation. Analysis allows us to state the inhomogeneity of the alloys obtained after 80 h of milling.

TG mechanical alloying Curie temperature Fe-Nb based alloys 

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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2005

Authors and Affiliations

  • J. J. Suñol
    • 1
  • A. Gonzőlez
    • 2
  • L. Escoda
    • 3
  • A. Vilaró
    • 4
  1. 1.GRMT, Dept. de Física. Universitat de Girona, Santaló s/n
  2. 2.GRMT, Dept. de Física. Universitat de Girona, Santaló s/n
  3. 3.GRMT, Dept. de Física. Universitat de Girona, Santaló s/n
  4. 4.GRMT, Dept. de Física. Universitat de Girona, Santaló s/n,

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