Imperial College London
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ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
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Contact

 

b.gault

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ma:2021:10.1002/adma.202006723,
author = {Ma, Y and Wang, Q and Zhou, X and Hao, J and Gault, B and Zhang, Q and Dong, C and Nieh, TG},
doi = {10.1002/adma.202006723},
journal = {Advanced Materials},
pages = {1--7},
title = {A novel soft-magnetic B2-based multiprincipal-element alloy with a uniform distribution of coherent body-centered-cubic nanoprecipitates},
url = {http://dx.doi.org/10.1002/adma.202006723},
volume = {33},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Multiprincipalelement alloys (MPEAs), including highentropy alloys, are a new class of materials whose thermodynamical properties are mainly driven by configuration entropy, rather than enthalpy in the traditional alloys, especially at high temperatures. Herein, the design of a novel softmagnetic nonequiatomic, quaternary MPEA is described, via tuning its chemical composition to deliberately manipulate its microstructure, such that it contains ultrafine ferromagnetic bodycenteredcubic (BCC) coherent nanoprecipitates (3–7 nm) uniformly distributed in a B2phase matrix. The new alloy Al1.5Co4Fe2Cr exhibits high saturation magnetization (MS = 135.3 emu g1), low coercivity (HC = 127.3 A m1), high Curie temperature (TC = 1061 K), and high electrical resistivity (ρ  = 244 μΩ cm), promising for soft magnets. More importantly, these prominent softmagnetic properties are observed to be retained even after the alloy is thermally exposed at 873 K for 555 h, apparently attributable to the excellent stability of the coherent microstructure. The versatility of the magnetic properties of this new alloy is discussed in light of the microstructural change induced by tuning the chemical composition, and the enhanced performance of the alloy is compared directly with that of the traditional softmagnetic alloys. The perspective is also addressed to design highperformance softmagnetic alloys for hightemperature applications.
AU  - Ma,Y
AU  - Wang,Q
AU  - Zhou,X
AU  - Hao,J
AU  - Gault,B
AU  - Zhang,Q
AU  - Dong,C
AU  - Nieh,TG
DO  - 10.1002/adma.202006723
EP  - 7
PY  - 2021///
SN  - 0935-9648
SP  - 1
TI  - A novel soft-magnetic B2-based multiprincipal-element alloy with a uniform distribution of coherent body-centered-cubic nanoprecipitates
T2  - Advanced Materials
UR  - http://dx.doi.org/10.1002/adma.202006723
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000624577600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adma.202006723
VL  - 33
ER  -
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