Imperial College London
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ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
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b.gault

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wang:2023:10.1016/j.scriptamat.2022.115143,
author = {Wang, S and Douglas, JO and Lovell, E and Wilson, N and Guo, L and Gault, B and Ryan, MP and Giuliani, F},
doi = {10.1016/j.scriptamat.2022.115143},
journal = {Scripta Materialia},
pages = {1--6},
title = {Near-atomic scale chemical analysis of interfaces in a La(Fe,Mn,Si)13-based magnetocaloric material},
url = {http://dx.doi.org/10.1016/j.scriptamat.2022.115143},
volume = {224},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - La(Fe,Mn,Si)13-based magnetocaloric materials are one of the most promising material families for the realisation of near-room temperature magnetic refrigeration. The functional and mechanical properties of these materials crucially depend on their chemistry, which is difficult to control at interfaces between microstructural units. Atom probe tomography was employed to reveal the local elemental distribution at the α-Fe/1:13 phase boundary and the 1:13/1:13 grain boundary. Strong Mn segregation (and Fe depletion) at the α-Fe/1:13 phase boundary suggests the potential effect of phase boundary area on the Curie temperature of the material. A local off-1:13 stoichiometry layer at the 1:13/1:13 grain boundary may adversely affect the magnetocaloric performance. Routes to mitigate the negative effects of interfaces on the functional and mechanical performance of these materials are discussed, in order to achieve durable and efficient operation of magnetic cooling devices.
AU  - Wang,S
AU  - Douglas,JO
AU  - Lovell,E
AU  - Wilson,N
AU  - Guo,L
AU  - Gault,B
AU  - Ryan,MP
AU  - Giuliani,F
DO  - 10.1016/j.scriptamat.2022.115143
EP  - 6
PY  - 2023///
SN  - 1359-6462
SP  - 1
TI  - Near-atomic scale chemical analysis of interfaces in a La(Fe,Mn,Si)13-based magnetocaloric material
T2  - Scripta Materialia
UR  - http://dx.doi.org/10.1016/j.scriptamat.2022.115143
UR  - https://www.sciencedirect.com/science/article/pii/S1359646222006388?via%3Dihub
UR  - http://hdl.handle.net/10044/1/100437
VL  - 224
ER  -
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