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Phase transformation and magnetic properties of nanocrystalline Fe[sub 73. 5]Cu[sub 1]Nb[sub 3]Si[sub 22. 5[minus]x]B[sub x] (x = 6,9) alloys

Conference · · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
OSTI ID:6824064
;  [1]; ;  [2]; ;  [3];  [4]
  1. CSIC, Madrid (Spain). Instituto de Ciencia de Materiales
  2. Instituto MASPEC/CNR, Parma (Italy)
  3. Parma Univ. (Italy). Physics Dept.
  4. CSSD/CNR, Parma (Italy)
+ Show Author Affiliations

The coercivity and phase transformations of Fe[sub 73.5]Cu[sub 1]Nb[sub 3]Si[sub 22.5[minus]x]B[sub x] nanocrystalline alloys as a function of temperature (540 and 620 C), annealing times (up to 240 min) and composition (x = 6 and 9) have been investigated by means of magnetic measurements, Moessbauer spectroscopy and X-ray diffractometry. Nanocrystalline microstructure after annealing at 540 C gives rise to a softening of the material, while after annealing at 620 C for short times a magnetic hardening is observed before a significant increase in size of the [alpha]-Fe(Si) grains and the detection of a secondary Fe[sub 2]B phase. The initial stages of Fe[sub 2]B precipitation seem to be responsible for this magnetic hardening.

OSTI ID:
6824064
Report Number(s):
CONF-930416--
Journal Information:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 29:6Pt1; ISSN IEMGAQ; ISSN 0018-9464
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
COPPER ALLOYS
CRYSTALLIZATION
DATA
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
NUMERICAL DATA
PHASE STUDIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SILICON ALLOYS
TEMPERATURE DEPENDENCE