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Development of high Bs Fe–Ni-based metal amorphous nanocomposite by optimization of glass-forming ability

Journal Article · · Journal of Materials Research
 [1];  [2];  [2]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States); Carnegie Mellon University
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States)
Thermocalc simulations identified compositions with good glass-forming ability (GFA) by locating minima in liquidus temperature, and solidification range in (Fe70 Ni30)x(B-Si-Nb)100-x alloys with x = 82% and x = 85%, increased compared to previously developed x = 80% alloys. 3 compositions in the x = 82% system and 1 in the x = 85% system were successfully cast as amorphous magnetic ribbon. Magnetic properties of as-cast alloys showed improvements in Curie temperature and saturation induction, especially for the 85% alloy. Crystallization behavior in the 85% alloy was determined to occur as a 2-step process. Annealing studies showed (Fe70Ni30)82Nb2Si0B16 and (Fe70Ni30)82Nb3Si0B15 alloys to exhibit low coercivity and high Bs with annealing. TEM results show significant crystallization in as-cast ribbon. The (Fe70Ni30)85Nb0.5Si0B14.5 alloy as-cast has small, uniformly distributed grains, allowing a useful nanocrystalline alloy to be produced as cast. Lastly, the parameter ΔTxg, the temperature range in which the material can be thermomechanically processed, was in the range of 12–23 °C.
Research Organization:
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Grant/Contract Number:
EE0007867; EE0008870
OSTI ID:
1824288
Alternate ID(s):
OSTI ID: 1592573
Journal Information:
Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 8 Vol. 36; ISSN 0884-2914
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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