Room temperature Young's modulus, shear modulus, Poisson's ratio and hardness of PbTe–PbS thermoelectric materials

Ni, Jennifer E.; Case, Eldon D.; Khabir, Kristen N.; Stewart, Ryan C.; Wu, Chun I.; Hogan, Timothy P.; Timm, E. J.; Girard, Steven N.; Kanatzidis, Mercouri G.

doi:10.1016/j.mseb.2010.02.026

Cited by 96 publications

(33 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The set of recorded resonant frequencies were fit to a model by commercial software (RPModel version 2.68b, Quasar International) to determine the elastic moduli. Details of the RUS procedure may be found elsewhere [21,[24][25][26][27].…”

Section: Elasticity Measurementsmentioning

confidence: 99%

“…The hardness and/or elastic moduli of a TE material have been shown to change by the addition of nanoparticles [19,20], creation of nanoprecipitates in the bulk material [21], doping [22], or alloying [22,23]. Therefore, to understand the mechanical response of a TE material that may be incorporated into a device, the mechanical properties need to be measured on a TE material with the addition of dopants, with nanoparticle or nanoprecipitates, rather than rely on mechanical property measurements of pure, undoped materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical properties of low-cost, earth-abundant chalcogenide thermoelectric materials, PbSe and PbS, with additions of 0–4 % CdS or ZnS

et al. 2014

Self Cite

View full text Add to dashboard Cite

PbTe-based thermoelectric (TE) materials have been extensively investigated as TE generator materials, however, the tellurium content limits the application potential due to both availability and cost. Replacing the tellurium with selenium or sulfur produces an isomorphic TE material with very good reported figure of merit, ZT, values of 1.3-1.6, but the effect of the material changes designed to increase ZT (doping, nano-and micro-precipitate additions) on mechanical properties has not been reported. In order to effectively incorporate these new materials into TE devices, it is important to understand materials' response to thermally and mechanically imposed loads, which in turn requires knowledge of the mechanical properties. In this study, the hardness was determined by Vickers indentation and elastic modulus and Poisson's ratio were measured using resonant ultrasound spectroscopy on PbSe-and PbS-based TE specimens as a function the addition of 0-4 at.% of CdS or ZnS. With 2.0 or 2.5 at.% Na doping, the hardness of PbSe-or PbS-based TE materials increased by about 30 % and the elastic moduli decreased by 5-10 %. In addition, PbS may be effectively sintered at 723 K when doped with 2.5 at.% Na, but requires a higher sintering temperature when undoped. This study shows that the hardness and moduli of PbSe-or PbSbased TE materials are not strong functions of the addition of CdS or ZnS precipitates.

show abstract

Section: Elasticity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical properties of low-cost, earth-abundant chalcogenide thermoelectric materials, PbSe and PbS, with additions of 0–4 % CdS or ZnS

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…RUS is a non-destructive technique widely used in the last decade to measure the elastic moduli of solid materials [58][59][60][61][62][63][64]. During the RUS measurements, the specimen was placed on a three-transducer configuration.…”

Section: Methodsmentioning

confidence: 99%

The effect of indentation-induced microcracks on the elastic modulus of hydroxyapatite

2012

View full text Add to dashboard Cite

The presence of microcracks in materials affects a wide range of mechanical properties including elastic modulus, Poisson's ratio, fracture strength, and fracture toughness. The microcrack-induced reductions of the Young's modulus, E, and Poisson's ratio, t, are functions of the size, geometry, and number density of microcracks. In this study, an array of Vickers indentation-induced microcracks was placed on the surfaces of two hydroxyapatite (HA) specimens with totals of 391 and 513 indentations per specimen. This study tests the validity of theoretical studies of microcrack damage-induced changes in E and t, where the changes are expressed either by (i) the volumetric crack number density, N and (ii) the crack damage parameter, e. All elasticity measurements were done via resonant ultrasound spectroscopy. For both the HA specimens included in the study and alumina specimens indented in an earlier study [J Mater Sci 38:1910. doi: 10.1007/BF00595764, 1], E and t decreased approximately linearly with increasing microcrack damage. The slopes of the E and t versus N and e are also computed and compared to the available theoretical models.

show abstract

“…From the resonant frequencies, specimen mass, dimensions, and geometry, the elastic moduli of the disk-spaced specimens were calculated using commercial software (RUSpec and CylModel, Quasar International, Inc., Albuquerque, NM). Additional details of the RUS procedure are provided elsewhere [25][26][27][28][29].…”

Section: Elasticity Measurementsmentioning

confidence: 99%

Influence of silver nanoparticle addition, porosity, and processing technique on the mechanical properties of Ba0.3Co4Sb12 skutterudites

et al. 2014

Self Cite

View full text Add to dashboard Cite

The thermoelectric skutterudite Ba 0.3 Co 4 Sb 12 is a promising candidate for waste heat recovery applications. Recently, it was demonstrated that the addition of silver nanoparticles (Ag NP ) to Ba 0.3 Co 4 Sb 12 increases both the thermoelectric figure of merit and electrical conductivity. This study is the first to examine the effect of Ag NP addition on the material's mechanical properties. This study also found that the Young's modulus, E, shear modulus, G, and bulk modulus, B, decreased linearly with increasing volume fraction porosity, P. Resonant ultrasound spectroscopy was employed to measure the elastic moduli, and Vickers indentation was used to determine the hardness, H, and fracture toughness, K C . Trends in the mechanical properties as a function of grain size, porosity, and the Ag NP are discussed in terms of the pertinent literature. While K C was independent of Ag NP addition, porosity, and grain size, both E and H decreased linearly with increasing porosity. In addition, this study is the first to identify (i) the Ag 3 Sb phase formed and (ii) the enhanced densification that occurs when the Ag NP is sintered with Ba 0.3 Co 4 Sb 12 powders, where both effects are consistent with the eutectic and peritectic reactions observed in the binary phase diagram Ag-Sb. These eutectic/peritectic reactions may also be linked to the enhancement of electrical conductivity previously observed when Ag is added to Ba 0.3 Co 4 Sb 12 . Also, similar beneficial eutectic/peritectic reactions may be available for other systems where conductive particles are added to other antimonides or other thermoelectric systems.

show abstract

Room temperature Young's modulus, shear modulus, Poisson's ratio and hardness of PbTe–PbS thermoelectric materials

Cited by 96 publications

References 50 publications

Mechanical properties of low-cost, earth-abundant chalcogenide thermoelectric materials, PbSe and PbS, with additions of 0–4 % CdS or ZnS

Mechanical properties of low-cost, earth-abundant chalcogenide thermoelectric materials, PbSe and PbS, with additions of 0–4 % CdS or ZnS

The effect of indentation-induced microcracks on the elastic modulus of hydroxyapatite

Influence of silver nanoparticle addition, porosity, and processing technique on the mechanical properties of Ba0.3Co4Sb12 skutterudites

Contact Info

Product

Resources

About