Thermoelectric Higher Manganese Silicide: Synthetized, sintered and shaped simultaneously by selective laser sintering/Melting additive manufacturing technique

Thimont, Yohann; Presmanes, Lionel; Baylac, Vincent; Tailhades, Philippe; Berthebaud, David; Gascoin, Franck

doi:10.1016/j.matlet.2017.12.026

Cited by 19 publications

(8 citation statements)

References 17 publications

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“…Improvement of their TE properties can be achieved through various strategies enhancing ZT [5,6]. Many studies have been focused on chemical doping of MnSi γ to increase the power factor PF = α 2 /ρ [7,8] or on fabrication of elaborated microstructures with the aim to decrease κ L via synthesis routes such as ball-milling [9], melt-spinning [10,11], fast combustion [12] or reactive sintering [13,14]. For example, ZT max exceeding unity has been obtained for Re supersaturated HMS realized by liquid quenching [15,16] at the expense of industrial scalability and elevated price of Re.…”

Section: Introductionmentioning

confidence: 99%

Mesostructure - thermoelectric properties relationships in V Mn1−Si1.74 (x = 0, 0.04) higher manganese silicides prepared by magnesiothermy

Tonquesse

Dorcet

Joanny

et al. 2020

Journal of Alloys and Compounds

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The synthesis of pure pristine and vanadium-doped MnSi γ (γ = 1.74) powder by a relatively fast, 'low temperature' and high yield magnesioreduction process is described. The powder obtained by this innovative route is composed of well crystallized grains with sizes ranging from 20 to 500 nm and free from any MnSi precipitates. Mesostructured densified pellets with average grain sizes as small as 550 nm are obtained by spark plasma sintering (SPS). Detailed structural and microstructural characterization of the samples were realized at every stage of the process, highlighting a high concentration of defects such as orientational or spacing anomalies of the Nowotny phase, γ variations within a single grain and dislocations. Accordingly a significant decrease of the lattice thermal conductivity is evidenced in comparison to conventionally synthesized (arc-melting/SPS) samples having similar density and (V/)Mn/Si stoichiometry.The thermoelectric properties of these materials are discussed in regard of their complex microstructure.

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Section: Introductionmentioning

confidence: 99%

Mesostructure - thermoelectric properties relationships in V Mn1−Si1.74 (x = 0, 0.04) higher manganese silicides prepared by magnesiothermy

Tonquesse

Dorcet

Joanny

et al. 2020

Journal of Alloys and Compounds

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“…Although additive manufacturing (colloquially known as 3D printing) has become prolific, its applica tion to thermoelectric materials and devices is relatively new. Additive manufacturing techniques have been shown on multiple low and high temperature thermoelectric materials such as bismuth telluride, 1,32-36 higher manganese silicide (HMS), 37 half Heusler, 38 and skutterudite, 39 thus demonstrating the feasibility of the manufac turing approach for these semiconductor materials. These advances in manufacturing capability open the door to a myriad of thermo electric leg geometries, which were previously unrealistic: a new fron tier in thermoelectric leg design is open.…”

Section: B Manufacturing Influences On Leg Geometrymentioning

confidence: 99%

The impact of thermoelectric leg geometries on thermal resistance and power output

Thimont

LeBlanc

2019

Journal of Applied Physics

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Thermoelectric devi ces enable direct, solid state conversion of heat to electricity and vice versa. Rather than designing the shape of thermo electric units or l eg s to maximize this energy conversion, the cuboid shape of these l eg s has instead remained unchanged in large part because of limitations in the standard manufacturing process. However, the advent of additive manufacturing (a technique in which freeform geometries are built up l aye r by l aye r) offers the potential to create unique thermoelectric leg geometries desi gn ed to optimize device performance. This work explores this new realm of nove! leg geometry by simulating the thermal and electrical performance of various leg geometries such as prismatic, hollow, and layered structures. The simulations are performed for two materials, a standard bismuth telluride material found in current commercial modules and a higher manganese silicide material proposed for low cost energy conversion in high temperature applications. The results indude the temperature gradient and electrical potential developed across individual thermoelectric legs as well as thermoelectric modules with 16 legs. Even simple hollow and layered l eg geometries result in larger temperature gradients and higher output powers than the traditional cuboid structure. The clear dependence of thermal resistance and power output on leg geometry provides compelling motivation to explore additive manufacturing of thermoelectric devices.

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“…Under this context, HMS constitute a family of intermetallic silicon compounds which are regarded as potential, p-type thermoelectric materials efficient in the intermediate temperature range. Moreover, they are the most promising p-type compatible counterpart to the existing n-type Mg 2 Si-based thermoelectric material, allowing the completion of two-leg efficient TEG made of earth-abundant, non-toxic elements [159,160]. Some of the typical silicon-based thermoelectric nanostructured materials and their thermoelectric properties are summarized in table 1.…”

Section: Nanostructured Bulkmentioning

confidence: 99%

Silicon-based nanostructures for integrated thermoelectric generators

Gadea

Pacios

Morata

et al. 2018

J. Phys. D: Appl. Phys.

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Nanostructuring is a promising approach for enhancing thermoelectric properties of existing abundant and compatible materials such as silicon and silicon-based compounds. Recent works on different nanostructures have presented silicon-based materials as outstanding candidates for their implementation in thermoelectric generators. The compatibility of silicon with mainstream technologies, such as microelectronics and micro- and nano-fabrication, has attracted attention due to the integration of some of its nanostructures in micro-thermoelectric generators for energy harvesting applications. This topical review is focused on the most recent advances in fabrication, characterization and device integration of silicon-based thermoelectric nanomaterials, offering an outlook with an application-oriented focus. In particular, the use of doped silicon, silicon–germanium and silicides in the form of nanowires, thin films and superlattices as well as porous, nano-crystalline and nano-composite bulk is covered. Moreover, this paper provides future perspectives and research directions on the integration of silicon-based materials for energy applications in light of the recent findings reviewed.

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Thermoelectric Higher Manganese Silicide: Synthetized, sintered and shaped simultaneously by selective laser sintering/Melting additive manufacturing technique

Cited by 19 publications

References 17 publications

Mesostructure - thermoelectric properties relationships in V Mn1−Si1.74 (x = 0, 0.04) higher manganese silicides prepared by magnesiothermy

Mesostructure - thermoelectric properties relationships in V Mn1−Si1.74 (x = 0, 0.04) higher manganese silicides prepared by magnesiothermy

The impact of thermoelectric leg geometries on thermal resistance and power output

Silicon-based nanostructures for integrated thermoelectric generators

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