DocumentCode
3602479
Title
LaFe11.6 Si1.4/Cu Magnetocaloric Composites Prepared by Hot Pressing
Author
Liu, J. ; Zhang, M.X. ; Shao, Y.Y. ; Yan, A.R.
Author_Institution
Key Lab. of Magn. Mater. & Devices, Ningbo Inst. of Mater. Technol. & Eng., Ningbo, China
Volume
51
Issue
11
fYear
2015
Firstpage
1
Lastpage
2
Abstract
We report on the microstructure, phase constitution, mechanical properties, and magnetocaloric effect (MCE) of Cu-bonded La(Fe,Si)13 composites prepared by hot pressing (HP) at different temperatures. It was found that the final density of composites greatly relies on the initial powder size and pressing temperature. Finer powders lower the temperature needed for fully compacting. HP at 700 °C suits finer La(Fe,Si)13 powders to approach the theoretical density and high mechanical strength, and 800 °C for coarse powders. At the same time, the drastic diffusion reaction takes place at evaluated temperature due to Cu-La eutectic point. Combined with the influence of press-induced grain breaking, the MCE was decreased with respect to the pure La(Fe,Si)13 phase.
Keywords
compaction; copper; diffusion; eutectic structure; fracture toughness; hot pressing; iron alloys; lanthanum alloys; magnetocaloric effects; micromechanics; particle reinforced composites; particle size; silicon alloys; Cu-La eutectic point; Cu-bonded La(FeSi)13 composites; LaFe11.6Si1.4-Cu; compaction; diffusion reaction; hot pressing; initial powder size; magnetocaloric composites; mechanical properties; mechanical strength; microstructure; phase constitution; press-induced grain breaking; pressing temperature; temperature 700 degC; temperature 800 degC; Magnetic hysteresis; Magnetic materials; Magnetomechanical effects; Microstructure; Powders; Pressing; Temperature; Composites; Hot pressing; La-Fe-Si; La???Fe???Si; composites; hot pressing (HP); magnetocaloric effect; magnetocaloric effect (MCE);
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2015.2436902
Filename
7112164
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