Fabrication of equiatomic FeCo alloy parts with high magnetic properties by fields activated sintering
Zhou, Bohao and Yang, Yi and Qin, Yi and Yang, Gang and Wu, Mingxia (2022) Fabrication of equiatomic FeCo alloy parts with high magnetic properties by fields activated sintering. Manufacturing Review, 9. 7. ISSN 2265-4224 (https://doi.org/10.1051/mfreview/2022001)
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Abstract
Electrical field activated sintering technology combined with micro-forming (Micro-FAST), as a new rapid powder sintering/forming method, is used to fabricate FeCo alloy parts. The successfully prepared FeCo parts have a high saturation of 214.11 emu/g and a low coercivity of 16 Oe, and these values are 20% and 10% higher than that of commercially available FeCoV alloy parts on the saturation and coercivity respectively. During the sintering process, the high current application shortened the densification time and enhanced the uniformity of the microstructure significantly. The grain sizes of FeCo alloys were in a range of 5–6 mm, and good isotropy was also shown. The low angle grain boundary (LAGB) accounted for more than 30% and the low angle misorientation accounted for more than 30% of the sample parts. Furthermore, the formation of the nano B2 phase was promoted during the Micro-FAST, and the size of the B2 phase was about 5 nm. The coherent interface between a and B2 was conducive for reducing the coercivity. As a consequence, the outstanding microstructure formed by Micro-FAST makes the FeCo alloys have high saturation and low coercivity.
ORCID iDs
Zhou, Bohao, Yang, Yi, Qin, Yi ORCID: https://orcid.org/0000-0001-7103-4855, Yang, Gang and Wu, Mingxia;-
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Item type: Article ID code: 79744 Dates: DateEvent25 February 2022Published15 January 2022AcceptedSubjects: Technology > Manufactures Department: Faculty of Engineering > Design, Manufacture and Engineering Management
Technology and Innovation Centre > Advanced Engineering and ManufacturingDepositing user: Pure Administrator Date deposited: 25 Feb 2022 13:07 Last modified: 04 Oct 2024 00:38 URI: https://strathprints.strath.ac.uk/id/eprint/79744