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

Moore, James D.; Klemm, Denis; Lindackers, D.; Grasemann, S.; Träger, R.; Eckert, J.; Löber, Lukas; Scudino, Sergio; Katter, M.; Barcza, Alexander; Skokov, Konstantin P.; Gutfleisch, Oliver

doi:10.1063/1.4816465

Cited by 120 publications

(64 citation statements)

References 23 publications

(55 reference statements)

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“…Future magnet products and devices may be used in conditions which are not compatible with current magnet technology, such as smaller dimensions, in more complex shapes, higher integrated applications and extreme environmental/chemical conditions. On the micro/macroscale, modern additive manufacturing processes, such as 3D printing, allow, in principle, novel magnet designs [182,183], but at this stage lack a detailed understanding of the correlation of the fabrication process and materials properties, as well as the validation of useful magnetic properties. …”

Section: Materials Science Tu Darmstadtmentioning

confidence: 99%

The 2017 Magnetism Roadmap

Sander

Valenzuela

Makarov

et al. 2017

J. Phys. D: Appl. Phys.

323

207

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Building upon the success and relevance of the 2014 Magnetism Roadmap, this 2017 Magnetism Roadmap edition follows a similar general layout, even if its focus is naturally shifted, and a different group of experts and, thus, viewpoints are being collected and presented. More importantly, key developments have changed the research landscape in very relevant ways, so that a novel view onto some of the most crucial developments is warranted, and thus, this 2017 Magnetism Roadmap article is a timely endeavour. The change in landscape is hereby not exclusively scientific, but also reflects the magnetism related industrial application portfolio. Specifically, Hard Disk Drive technology, which still dominates digital storage and will continue to do so for many years, if not decades, has now limited its footprint in the scientific Topical ReviewOriginal content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. and research community, whereas significantly growing interest in magnetism and magnetic materials in relation to energy applications is noticeable, and other technological fields are emerging as well. Also, more and more work is occurring in which complex topologies of magnetically ordered states are being explored, hereby aiming at a technological utilization of the very theoretical concepts that were recognised by the 2016 Nobel Prize in Physics.Given this somewhat shifted scenario, it seemed appropriate to select topics for this Roadmap article that represent the three core pillars of magnetism, namely magnetic materials, magnetic phenomena and associated characterization techniques, as well as applications of magnetism. While many of the contributions in this Roadmap have clearly overlapping relevance in all three fields, their relative focus is mostly associated to one of the three pillars. In this way, the interconnecting roles of having suitable magnetic materials, understanding (and being able to characterize) the underlying physics of their behaviour and utilizing them for applications and devices is well illustrated, thus giving an accurate snapshot of the world of magnetism in 2017.The article consists of 14 sections, each written by an expert in the field and addressing a specific subject on two pages. Evidently, the depth at which each contribution can describe the subject matter is limited and a full review of their statuses, advances, challenges and perspectives cannot be fully accomplished. Also, magnetism, as a vibrant research field, is too diverse, so that a number of areas will not be adequately represented here, leaving space for further Roadmap editions in the future. However, this 2017 Magnetism Roadmap article can provide a frame that will enable the reader to judge where each subject and magnetism research field stands overall today and which directions it might take in the foreseeable future.The first mater...

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Section: Materials Science Tu Darmstadtmentioning

confidence: 99%

The 2017 Magnetism Roadmap

Sander

Valenzuela

Makarov

et al. 2017

J. Phys. D: Appl. Phys.

323

207

View full text Add to dashboard Cite

show abstract

“…It also revealed a problem of structure collapsing during sintering. Moore et al [9] used selective laser melting technology to fabricate a wavy-channel block and an array of fin-shaped rods. The minimum channel diameter was around 0.800 mm and a corrosion problem existed.…”

Section: Micro-channel Matrixmentioning

confidence: 99%

“…The micro-channel matrix for MCR application, which consists of numerous micro channels opened through a monolithic block, has been presented in a few of papers [8,9]. showed that the parallel plate and micro-channel matrices were preferable concerning a balance between heat transfer and pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Study of geometries of active magnetic regenerators for room temperature magnetocaloric refrigeration

Lei

Engelbrecht

Nielsen

et al. 2017

Applied Thermal Engineering

103

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“…In 2013, Moore et al [136] proposed a selective laser melting (SLM) method for the production of a more sophisticated AMR geometry (compared to most widely applied, packed-bed and parallel-plate geometries). SLM is a rapid prototyping technique to form a variety of three-dimensional shapes.…”

Section: Fabrication Of Powder-based (Sintered) Amrsmentioning

confidence: 99%

Active Magnetic Regeneration

Kitanovski

Tušek

Tomc

et al. 2014

Green Energy and Technology

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It is well known that the magnetocaloric effect of most magnetocaloric materials at moderate magnetic fields (up to 1.5 T) is limited to a maximum adiabatic temperature change of 5 K [1,2]. This value is not sufficient for such materials to be directly implemented into a practical cooling or heating device where temperature span over 30 K is required. Therefore, in order to increase the temperature span, one and so far the best option is for a heat regenerator to be included in the magnetic thermodynamic cycle.A heat regenerator is a type of indirect heat exchanger where the heat is periodically stored and transferred from/to a thermal storage medium (regenerative material) by a working (heat-transfer) fluid. The regenerative material usually has a porous structure, through which a working fluid is pumped in an oscillatory, counter-flow manner (which is more efficient than a parallel flow system). During the 'hot period', a warmer fluid flows through the regenerative material, which cools down, while the material heats up. As a result, heat is stored in the material. During the 'cold period', a cooler fluid flows through previously heated regenerative material, so the fluid heats up, while the material cools down. The heat is therefore transferred back to the fluid (the same fluid or a different one) at a different phase of the thermodynamic cycle. After a certain number of such steps, a periodic steady state is reached and, as a result, a temperature profile can be established along the length of the regenerator [3].The need to apply heat regenerators in a magnetic refrigerator was already realized by Brown [4] in the first prototype of a magnetic refrigerator, built in 1976. He applied a regenerative Stirling-like thermodynamic cycle (very similar to AMR), which significantly increased the temperature span of the device [4,5]. A few years later Steyert [6] and Barclay and Steyert [7] presented and explained the active magnetic regenerator, which remains the most applied method for the exploitation of the magnetocaloric effect at room temperature. Furthermore, all prototypes of magnetic refrigerators built since then have been based on the AMR process [5]. An AMR, unlike a passive (regular) heat regenerator, contains a magnetocaloric material as the regenerative material. It has a double function in a magnetic regenerator, i.e. it works as a regenerator and enables an increase in the temperature span as well as working as a coolant and generating/absorbing heat between the particular phases of the

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

Cited by 120 publications

References 23 publications

The 2017 Magnetism Roadmap

The 2017 Magnetism Roadmap

Study of geometries of active magnetic regenerators for room temperature magnetocaloric refrigeration

Active Magnetic Regeneration

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