Prediction of good glass forming ability in amorphous soft magnetic alloys by thermocalc simulation with experimental validation
Journal Article
·
· Journal of Alloys and Compounds
- Carnegie Mellon Univ., Pittsburgh, PA (United States). Materials Science and Engineering; Carnegie Mellon University
- Carnegie Mellon Univ., Pittsburgh, PA (United States). Materials Science and Engineering
- Carpenter Technologies, Reading, PA (United States)
- National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
Alloys in a (Fe70Ni30)80(BeSieNb)20 system, with good glass forming ability (GFA), were identified using Thermocalc software to simulate liquidus temperatures (T's) and solidification ranges (areas between the liquidus and solidus in a binary phase diagram,a line at fixed T). Here, a region with excellent GFA was identified at 14-18% B and 0-7% Si with the balance Nb, showing minima in liquidus and solidification range. A region with a solidification range minimum, but no corresponding liquidus minimum was identified at 3-8% B and 5-10% Si but had lower GFA. A shallow liquidus minimum, with no minimum in solidification range, at 3-5% B and 1-3% Si had the lowest GFA and did not produce amorphous material. Measured GFA was ranked using parameters Trg, DTxg, and γm, defined herein. Only the reduced glass transition temperature, Trg, was predictive for the alloys. Differential Scanning Calorimetry (DSC) data showed liquidus T's to agree. Curie temperatures, Tc's were observed to increase with B/Nb ratio. Simulations of liquidus and solidification range for alloys with 18 and 15% glass formers do not show regions with minima in both, indicating good GFA is not expected.
- Research Organization:
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- EE0007867
- OSTI ID:
- 1574684
- Alternate ID(s):
- OSTI ID: 1564317
- Journal Information:
- Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Journal Issue: C Vol. 814; ISSN 0925-8388
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of High Bs Fe-Ni Based Metal Amorphous Nanocomposite by Optimization of Glass Forming Ability
Development of High Bs Fe-Ni Based Metal Amorphous Nanocomposite by Optimization of Glass Forming Ability
Development of high Bs Fe–Ni-based metal amorphous nanocomposite by optimization of glass-forming ability
Conference
·
Mon Apr 26 00:00:00 EDT 2021
·
OSTI ID:1760268
Development of High Bs Fe-Ni Based Metal Amorphous Nanocomposite by Optimization of Glass Forming Ability
Conference
·
Mon Jan 20 23:00:00 EST 2020
· Journal of Materials Research
·
OSTI ID:1592573
Development of high Bs Fe–Ni-based metal amorphous nanocomposite by optimization of glass-forming ability
Journal Article
·
Sun Apr 04 20:00:00 EDT 2021
· Journal of Materials Research
·
OSTI ID:1824288