A bimodal particle size distribution enhances mechanical and magnetocaloric properties of low-temperature hot pressed Sn-bonded La0.8Ce0.2(Fe0.95Co0.05)11.8Si1.2 bulk composites

[Display omitted] •La-Ce-Fe-Co-Si/Sn bulk composites with bimodal size-distributed powder were prepared by HP.•Large entropy change of 7.96–8.71 J/(kg·K) at 2 T was obtained in these bulk composites.•Enhanced λ of 8.05 W/mK and σbc of 224 MPa were obtained in the optimized composites.•Good comprehen...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-01, Vol.469, p.133-137
Main Authors: Zhong, X.C., Feng, X.L., Huang, J.H., Jiao, D.L., Zhang, H., Qiu, W.Q., Liu, Z.W., Ramanujan, R.V.
Format: Article
Language:English
Subjects:
Composite materials
Compressive strength
Hot pressing
Magnetocaloric effect
Thermal conductivity
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Summary:[Display omitted] •La-Ce-Fe-Co-Si/Sn bulk composites with bimodal size-distributed powder were prepared by HP.•Large entropy change of 7.96–8.71 J/(kg·K) at 2 T was obtained in these bulk composites.•Enhanced λ of 8.05 W/mK and σbc of 224 MPa were obtained in the optimized composites.•Good comprehensive performance makes the bulk composites suitable for magnetic refrigeration. We report a Sn-bonded La0.8Ce0.2(Fe0.95Co0.05)11.8Si1.2 bulk composite with improved mechanical and magnetocaloric properties. La0.8Ce0.2(Fe0.95Co0.05)11.8Si1.2 powders with a bimodal particle size distribution were mixed with a binder of Sn powder and hot pressed at a relatively low temperature of 423 K (150 °C). The use of bimodal size-distributed powder can reduce the non-magnetic Sn content. A bimodal particle size distribution of coarse particles (180–250 μm) and fine powders (
ISSN:0304-8853
DOI:10.1016/j.jmmm.2018.08.053