Imperial College London
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ProfessorMaryRyan

Central Faculty, Office of the Provost

Vice-Provost (Research and Enterprise)
 
 
 
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Contact

 

+44 (0)20 7594 6755m.p.ryan

 
 
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Location

 

B338Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wang:2022:10.1016/j.jallcom.2022.164274,
author = {Wang, S and Gavalda-Diaz, O and Luo, T and Guo, L and Lovell, E and Wilson, N and Gault, B and Ryan, MP and Giuliani, F},
doi = {10.1016/j.jallcom.2022.164274},
journal = {Journal of Alloys and Compounds},
pages = {1--10},
title = {The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material},
url = {http://dx.doi.org/10.1016/j.jallcom.2022.164274},
volume = {906},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Magnetocaloric cooling offers the potential to improve the efficiency of refrigeration devices and hence cut the significant CO2 emissions associated with cooling processes. A critical issue in deployment of this technology is the mechanical degradation of the magnetocaloric material during processing and operation, leading to limited service-life. The mechanical properties of hydrogenated La(Fe,Mn,Si)13-based magnetocaloric material are studied using macroscale bending tests of polycrystalline specimens and in situ micropillar compression tests of single crystal specimens. The impact of hydrogenation on the mechanical properties are quantified. Understanding of the deformation/failure mechanisms is aided by characterization with transmission electron microscopy and atom probe tomography to reveal the arrangement of hydrogen atoms in the crystal lattice. Results indicate that the intrinsic strength of this material is ~3-6 GPa and is dependent on the crystal orientation. Single crystals under compressive load exhibit shearing along specific crystallographic planes. Hydrogen deteriorates the strength of La(Fe,Mn,Si)13 through promotion of transgranular fracture. The weakening effect of hydrogen on single crystals is anisotropic; it is significant upon shearing parallel to the {111} crystallographic planes but is negligible when the shear plane is {001}-oriented. APT analysis suggests that this is associated with the close arrangement of hydrogen atoms on {222} planes.
AU  - Wang,S
AU  - Gavalda-Diaz,O
AU  - Luo,T
AU  - Guo,L
AU  - Lovell,E
AU  - Wilson,N
AU  - Gault,B
AU  - Ryan,MP
AU  - Giuliani,F
DO  - 10.1016/j.jallcom.2022.164274
EP  - 10
PY  - 2022///
SN  - 0925-8388
SP  - 1
TI  - The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material
T2  - Journal of Alloys and Compounds
UR  - http://dx.doi.org/10.1016/j.jallcom.2022.164274
UR  - https://www.sciencedirect.com/science/article/pii/S092583882200665X?via%3Dihub
UR  - http://hdl.handle.net/10044/1/94906
VL  - 906
ER  -
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