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

X. C. Zhong; X. L. Feng; J. H. Huang; D. L. Jiao; H. Zhang; W. Q. Qiu; Z. W. Liu; R. V. Ramanujan

doi:10.1016/j.jmmm.2018.08.053

A bimodal particle size distribution enhances mechanical and magnetocaloric properties of low-temperature hot pressed Sn-bonded La_0.8Ce_0.2(Fe_0.95Co_0.05)_11.8Si_1.2 bulk composites

X. C. Zhong^*, X. L. Feng, J. H. Huang, D. L. Jiao, H. Zhang, W. Q. Qiu, Z. W. Liu, R. V. Ramanujan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We report a Sn-bonded La_0.8Ce_0.2(Fe_0.95Co_0.05)_11.8Si_1.2 bulk composite with improved mechanical and magnetocaloric properties. La_0.8Ce_0.2(Fe_0.95Co_0.05)_11.8Si_1.2 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 (<45 μm) resulted in particle integrity even after hot pressing. The maximum values of magnetic entropy change (−ΔS_M) and adiabatic temperature change (ΔT_ad) increased from 7.96 J/(kg·K) (2 T), and 2.05 K (1.4 T) to 8.71 J/kg and 2.14 K, respectively, due to this microstructure. The optimized composite exhibited an enhanced compressive strength of 224 MPa and a large (−ΔS_M)^max of 8.71 J/(kg·K) as well as an excellent thermal conductivity of about 8.05 W/(m·K).

Original language	English
Pages (from-to)	133-137
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	469
DOIs	https://doi.org/10.1016/j.jmmm.2018.08.053
Publication status	Published - Jan 1 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Keywords

Composite materials
Compressive strength
Hot pressing
Magnetocaloric effect
Thermal conductivity

Access to Document

10.1016/j.jmmm.2018.08.053

Cite this

Zhong, X. C., Feng, X. L., Huang, J. H., Jiao, D. L., Zhang, H., Qiu, W. Q., Liu, Z. W., & Ramanujan, R. V. (2019). A bimodal particle size distribution enhances mechanical and magnetocaloric properties of low-temperature hot pressed Sn-bonded La_0.8Ce_0.2(Fe_0.95Co_0.05)_11.8Si_1.2 bulk composites. Journal of Magnetism and Magnetic Materials, 469, 133-137. https://doi.org/10.1016/j.jmmm.2018.08.053

@article{55c66dbb45bd42a9b53d50bd1cd0322b,

title = "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",

abstract = "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 (<45 μm) resulted in particle integrity even after hot pressing. The maximum values of magnetic entropy change (−ΔSM) and adiabatic temperature change (ΔTad) increased from 7.96 J/(kg·K) (2 T), and 2.05 K (1.4 T) to 8.71 J/kg and 2.14 K, respectively, due to this microstructure. The optimized composite exhibited an enhanced compressive strength of 224 MPa and a large (−ΔSM)max of 8.71 J/(kg·K) as well as an excellent thermal conductivity of about 8.05 W/(m·K).",

keywords = "Composite materials, Compressive strength, Hot pressing, Magnetocaloric effect, Thermal conductivity",

author = "Zhong, {X. C.} and Feng, {X. L.} and Huang, {J. H.} and Jiao, {D. L.} and H. Zhang and Qiu, {W. Q.} and Liu, {Z. W.} and Ramanujan, {R. V.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = jan,

day = "1",

doi = "10.1016/j.jmmm.2018.08.053",

language = "English",

volume = "469",

pages = "133--137",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

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Zhong, XC, Feng, XL, Huang, JH, Jiao, DL, Zhang, H, Qiu, WQ, Liu, ZW & Ramanujan, RV 2019, 'A bimodal particle size distribution enhances mechanical and magnetocaloric properties of low-temperature hot pressed Sn-bonded La_0.8Ce_0.2(Fe_0.95Co_0.05)_11.8Si_1.2 bulk composites', Journal of Magnetism and Magnetic Materials, vol. 469, pp. 133-137. https://doi.org/10.1016/j.jmmm.2018.08.053

A bimodal particle size distribution enhances mechanical and magnetocaloric properties of low-temperature hot pressed Sn-bonded La_0.8Ce_0.2(Fe_0.95Co_0.05)_11.8Si_1.2 bulk composites. / Zhong, X. C.; Feng, X. L.; Huang, J. H. et al.
In: Journal of Magnetism and Magnetic Materials, Vol. 469, 01.01.2019, p. 133-137.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - 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

AU - Zhong, X. C.

AU - Feng, X. L.

AU - Huang, J. H.

AU - Jiao, D. L.

AU - Zhang, H.

AU - Qiu, W. Q.

AU - Liu, Z. W.

AU - Ramanujan, R. V.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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 (<45 μm) resulted in particle integrity even after hot pressing. The maximum values of magnetic entropy change (−ΔSM) and adiabatic temperature change (ΔTad) increased from 7.96 J/(kg·K) (2 T), and 2.05 K (1.4 T) to 8.71 J/kg and 2.14 K, respectively, due to this microstructure. The optimized composite exhibited an enhanced compressive strength of 224 MPa and a large (−ΔSM)max of 8.71 J/(kg·K) as well as an excellent thermal conductivity of about 8.05 W/(m·K).

AB - 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 (<45 μm) resulted in particle integrity even after hot pressing. The maximum values of magnetic entropy change (−ΔSM) and adiabatic temperature change (ΔTad) increased from 7.96 J/(kg·K) (2 T), and 2.05 K (1.4 T) to 8.71 J/kg and 2.14 K, respectively, due to this microstructure. The optimized composite exhibited an enhanced compressive strength of 224 MPa and a large (−ΔSM)max of 8.71 J/(kg·K) as well as an excellent thermal conductivity of about 8.05 W/(m·K).

KW - Composite materials

KW - Compressive strength

KW - Hot pressing

KW - Magnetocaloric effect

KW - Thermal conductivity

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