The effect of the thermal decomposition reaction on the mechanical and magnetocaloric properties of La(Fe,Si,Co)13

Löwe, Konrad; Liu, Jian; Skokov, Konstantin P.; Moore, James D.; Sepehri-Amin, H.; Hono, K.; Katter, M.; Gutfleisch, Oliver

doi:10.1016/j.actamat.2012.04.027

Cited by 77 publications

(35 citation statements)

References 23 publications

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“…% of 1:13 phase. 22 Quenching is needed to avoid the thermal decomposition process in La(Fe,Co,Si) 13 that occurs between 873 and 1173 K. 23 After that, the blocks retained their SLM geometries as the annealing temperature is well below the melting point of La(Fe,Si) 13 ($1800 K).…”

Section: Resultsmentioning

confidence: 99%

Selective laser melting of La(Fe,Co,Si)13 geometries for magnetic refrigeration

Moore¹,

Klemm²,

Lindackers³

et al. 2013

Journal of Applied Physics

122

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Articles you may be interested inEnhanced mechanical properties and large magnetocaloric effects in bonded La(Fe, Si)13-based magnetic refrigeration materials Appl. Phys. Lett. 104, 062407 (2014); 10.1063/1.4865236 Refrigerant capacity and direct measurements of the magnetocaloric effect on LaFe 11.2 Co 0.7 Si 1.1 C x materials J. Appl. Phys. 107, 09A933 (2010); 10.1063/1.3349372 The study on the microstructure and the magnetocaloric effects in LaFe 10.8 Co 0.7 Si 1.5 C 0.2 compound at different annealing times J. Appl. Phys. 107, 09A905 (2010); 10.1063/1.3335603 Magnetocaloric effect in spherical La ( Fe x Si 1 − x ) 13 and their hydrides for active magnetic regenerator-type refrigerator

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Section: Resultsmentioning

confidence: 99%

Selective laser melting of La(Fe,Co,Si)13 geometries for magnetic refrigeration

Moore¹,

Klemm²,

Lindackers³

et al. 2013

Journal of Applied Physics

122

View full text Add to dashboard Cite

show abstract

“…phase, in agreement with the previous reports of microstructures. 7,10 A very clear contour of Cu is shown in Fig. 1(d), which indicates that Cu was fully coated on the surface of powders.…”

Section: Methodsmentioning

confidence: 93%

“…Then, the well machined plates were re-annealed at the temperatures from 1273 to 1373 K for La(Fe, Si) 13 recombination to recover the magnetocaloric properties. 7 The pores were introduced by pulverizing the bulk La(Fe, Si) 13 alloy and subsequently compacting it at 1003 K. It was observed that La(Fe, Si) 13 magnetic refrigerants do not degrade mechanically during cycling. 6 The porous architecture Thermal decomposition and recombination can avoid the poor machinability of bulk La(Fe, Si) 13 compounds.…”

Section: Introductionmentioning

confidence: 99%

“…6 The porous architecture Thermal decomposition and recombination can avoid the poor machinability of bulk La(Fe, Si) 13 compounds. 7 But it is not helpful for releasing the internal strain due to the volume expansion during refrigerate cycling. On the one hand, although the structural stability during cycling could be considerably improved by introducing pores, it also results in a reduced efficiency of thermal transfer.…”

Section: Introductionmentioning

confidence: 99%

“…6,7 It was proposed that the bulk La(Fe, Si) 13 compounds were first thermal decomposed at the temperatures from 873 to 1173 K to enhance the mechanical properties in order to get a good machinability. Then, the well machined plates were re-annealed at the temperatures from 1273 to 1373 K for La(Fe, Si) 13 recombination to recover the magnetocaloric properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of magnetic hysteresis loss, corrosion resistance and compressive strength through spark plasma sintering magnetocaloric LaFe11.65Si1.35/Cu core-shell powders

et al. 2016

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LaFe11.65Si1.35/Cu core-shell powders were achieved by self-designed magnetron sputtering system, which presents a better solidification during spark plasma sintering in comparison to the naked LaFe11.65Si1.35 powders. Much higher compressive strength, lower corrosion current density and magnetic hysteresis losses are achieved for the sintered sample of LaFe11.65Si1.35/Cu core-shell powders without significant decrease of the magnetic entropy change. The compressive strength, corrosion current density and maximum magnetic hysteresis losses are 105.6 MPa/16.8 MPa, 1.08 × 10−3A/cm2/3.03 × 10−3 A/cm2 and 1.33 J/kg/2.71 J/kg, respectively for the sintered samples of core-shell structured/naked powders. The technique of fabricating the core-shell structured powders demonstrated here is also applicable for other types of functional powders.

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Disorder effects in giant magnetocaloric materials

Amaral

2014

Physica Status Solidi (a)

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In striving for mass production of magnetocaloric materials for refrigeration applications, one has to face the fact that these will not be laboratory‐grade materials, and will necessarily present (at the very least) composition gradients due to lower quality precursors. One can expect some probable consequences from this, namely that the maximum value of magnetic entropy change (ΔSM) will decrease compared to a pure material, but also some broadening of the ΔSM(T) curves should occur, as observed in some elementary ferromagnets. Some theoretical work has focused on this topic, for second‐order phase transition systems via the Landau theory of phase transitions and the molecular mean‐field model. Still, these theoretical considerations do not directly apply to first‐order phase transition (giant magnetocaloric effect) systems. We here present a study on the effect of disorder on the magnetic and magnetocaloric properties of first‐order phase transition systems. We employ the Bean–Rodbell model, and consider disorder to be described by a width of a Curie temperature distribution. We show how disorder effects “smooth” the discontinuities of magnetization and entropy change, and also affect magnetic hysteresis. We show how for sufficiently large disorder, the shape of the magnetic entropy curves approximate the distribution function. We discuss how the magnetic field dependence of magnetic entropy change is affected by disorder, in light of recent reports of “second‐order like” dependence of magnetic entropy change on applied magnetic field, for disordered giant magnetocaloric effect La–Fe–Si‐based samples.

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The effect of the thermal decomposition reaction on the mechanical and magnetocaloric properties of La(Fe,Si,Co)13

Cited by 77 publications

References 23 publications

Selective laser melting of La(Fe,Co,Si)13 geometries for magnetic refrigeration

Selective laser melting of La(Fe,Co,Si)13 geometries for magnetic refrigeration

Improvement of magnetic hysteresis loss, corrosion resistance and compressive strength through spark plasma sintering magnetocaloric LaFe11.65Si1.35/Cu core-shell powders

Disorder effects in giant magnetocaloric materials

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