Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials

A. Q. Morrison; E. D. Case; F. Ren; A. J. Baumann; D. C. Kleinow; J. E. Ni; T. P. Hogan; J. D'Angelo; N. A. Matchanov; T. J. Hendricks; N. K. Karri; C. Cauchy; J. Barnard; M. G. Kanatzidis

doi:10.1016/j.matchemphys.2012.03.100

Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials

A. Q. Morrison, E. D. Case^*, F. Ren, A. J. Baumann, D. C. Kleinow, J. E. Ni, T. P. Hogan, J. D'Angelo, N. A. Matchanov, T. J. Hendricks, N. K. Karri, C. Cauchy, J. Barnard, M. G. Kanatzidis

^*Corresponding author for this work

Chemistry

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

16 Scopus citations

Abstract

Harvesting of waste heat may lead to macrocrack and/or microcrack damage accumulation in thermoelectrics. No studies in the open literature address the thermal fatigue of any thermoelectric material. This study characterizes the thermal fatigue behavior for two PbTe-based thermoelectric materials, n-type LAST (lead-antimony-silver-tellurium) and p-type LASTT (lead-antimony-silver- tellurium-tin). The mechanical properties (fracture strength, elastic moduli) were evaluated for up to 200 thermal fatigue cycles. In addition, the electrical and thermal transport properties were evaluated for n- and p-type specimens for thermal cycling. The elastic moduli were relatively insensitive to thermal fatigue treatment. The fracture strength, σ _f, of the thermally fatigued LASTT specimens was in a band of from 25 to 40 MPa while σ _f of the thermally fatigued LAST ranged from 15 to 38 MPa. The thermopower and electrical conductivity of LASTT samples showed small deviations from the low temperature trend near 600 K and the data repeated well after the first temperature cycle for all samples. For the n-type LAST samples, the electrical conductivity and thermopower showed larger deviations from the low temperature trend near 500 K with some samples requiring several temperature cycles before showing repeatability in the data, suggesting a possible secondary phase in the samples.

Original language	English (US)
Pages (from-to)	973-987
Number of pages	15
Journal	Materials Chemistry and Physics
Volume	134
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2012.03.100
State	Published - Jun 15 2012

Funding

The authors acknowledge funding from Strategic Environmental Research and Development Program provided by a subcontract through Pacific Northwest National Laboratory . The authors also acknowledge the Defense University Research Instrumentation Program (DURIP) Grant No. N00014-09-1-0785 , Office of Naval Research , which provided funding for the purchase of the Resonant Ultrasound Spectroscopy apparatus utilized in this research.

Keywords

Electrical conductivity
Fracture strength
Thermal fatigue
Thermoelectrics
Thermopower
Young's modulus

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1016/j.matchemphys.2012.03.100

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Morrison, A. Q., Case, E. D., Ren, F., Baumann, A. J., Kleinow, D. C., Ni, J. E., Hogan, T. P., D'Angelo, J., Matchanov, N. A., Hendricks, T. J., Karri, N. K., Cauchy, C., Barnard, J., & Kanatzidis, M. G. (2012). Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials. Materials Chemistry and Physics, 134(2-3), 973-987. https://doi.org/10.1016/j.matchemphys.2012.03.100

@article{8d258fd8c922453d9187c1f59e94d6e0,

title = "Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials",

abstract = "Harvesting of waste heat may lead to macrocrack and/or microcrack damage accumulation in thermoelectrics. No studies in the open literature address the thermal fatigue of any thermoelectric material. This study characterizes the thermal fatigue behavior for two PbTe-based thermoelectric materials, n-type LAST (lead-antimony-silver-tellurium) and p-type LASTT (lead-antimony-silver- tellurium-tin). The mechanical properties (fracture strength, elastic moduli) were evaluated for up to 200 thermal fatigue cycles. In addition, the electrical and thermal transport properties were evaluated for n- and p-type specimens for thermal cycling. The elastic moduli were relatively insensitive to thermal fatigue treatment. The fracture strength, σ f, of the thermally fatigued LASTT specimens was in a band of from 25 to 40 MPa while σ f of the thermally fatigued LAST ranged from 15 to 38 MPa. The thermopower and electrical conductivity of LASTT samples showed small deviations from the low temperature trend near 600 K and the data repeated well after the first temperature cycle for all samples. For the n-type LAST samples, the electrical conductivity and thermopower showed larger deviations from the low temperature trend near 500 K with some samples requiring several temperature cycles before showing repeatability in the data, suggesting a possible secondary phase in the samples.",

keywords = "Electrical conductivity, Fracture strength, Thermal fatigue, Thermoelectrics, Thermopower, Young's modulus",

author = "Morrison, {A. Q.} and Case, {E. D.} and F. Ren and Baumann, {A. J.} and Kleinow, {D. C.} and Ni, {J. E.} and Hogan, {T. P.} and J. D'Angelo and Matchanov, {N. A.} and Hendricks, {T. J.} and Karri, {N. K.} and C. Cauchy and J. Barnard and Kanatzidis, {M. G.}",

note = "Funding Information: The authors acknowledge funding from Strategic Environmental Research and Development Program provided by a subcontract through Pacific Northwest National Laboratory . The authors also acknowledge the Defense University Research Instrumentation Program (DURIP) Grant No. N00014-09-1-0785 , Office of Naval Research , which provided funding for the purchase of the Resonant Ultrasound Spectroscopy apparatus utilized in this research. ",

year = "2012",

month = jun,

day = "15",

doi = "10.1016/j.matchemphys.2012.03.100",

language = "English (US)",

volume = "134",

pages = "973--987",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier BV",

number = "2-3",

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Morrison, AQ, Case, ED, Ren, F, Baumann, AJ, Kleinow, DC, Ni, JE, Hogan, TP, D'Angelo, J, Matchanov, NA, Hendricks, TJ, Karri, NK, Cauchy, C, Barnard, J & Kanatzidis, MG 2012, 'Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials', Materials Chemistry and Physics, vol. 134, no. 2-3, pp. 973-987. https://doi.org/10.1016/j.matchemphys.2012.03.100

TY - JOUR

T1 - Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials

AU - Morrison, A. Q.

AU - Case, E. D.

AU - Ren, F.

AU - Baumann, A. J.

AU - Kleinow, D. C.

AU - Ni, J. E.

AU - Hogan, T. P.

AU - D'Angelo, J.

AU - Matchanov, N. A.

AU - Hendricks, T. J.

AU - Karri, N. K.

AU - Cauchy, C.

AU - Barnard, J.

AU - Kanatzidis, M. G.

N1 - Funding Information: The authors acknowledge funding from Strategic Environmental Research and Development Program provided by a subcontract through Pacific Northwest National Laboratory . The authors also acknowledge the Defense University Research Instrumentation Program (DURIP) Grant No. N00014-09-1-0785 , Office of Naval Research , which provided funding for the purchase of the Resonant Ultrasound Spectroscopy apparatus utilized in this research.

PY - 2012/6/15

Y1 - 2012/6/15

N2 - Harvesting of waste heat may lead to macrocrack and/or microcrack damage accumulation in thermoelectrics. No studies in the open literature address the thermal fatigue of any thermoelectric material. This study characterizes the thermal fatigue behavior for two PbTe-based thermoelectric materials, n-type LAST (lead-antimony-silver-tellurium) and p-type LASTT (lead-antimony-silver- tellurium-tin). The mechanical properties (fracture strength, elastic moduli) were evaluated for up to 200 thermal fatigue cycles. In addition, the electrical and thermal transport properties were evaluated for n- and p-type specimens for thermal cycling. The elastic moduli were relatively insensitive to thermal fatigue treatment. The fracture strength, σ f, of the thermally fatigued LASTT specimens was in a band of from 25 to 40 MPa while σ f of the thermally fatigued LAST ranged from 15 to 38 MPa. The thermopower and electrical conductivity of LASTT samples showed small deviations from the low temperature trend near 600 K and the data repeated well after the first temperature cycle for all samples. For the n-type LAST samples, the electrical conductivity and thermopower showed larger deviations from the low temperature trend near 500 K with some samples requiring several temperature cycles before showing repeatability in the data, suggesting a possible secondary phase in the samples.

AB - Harvesting of waste heat may lead to macrocrack and/or microcrack damage accumulation in thermoelectrics. No studies in the open literature address the thermal fatigue of any thermoelectric material. This study characterizes the thermal fatigue behavior for two PbTe-based thermoelectric materials, n-type LAST (lead-antimony-silver-tellurium) and p-type LASTT (lead-antimony-silver- tellurium-tin). The mechanical properties (fracture strength, elastic moduli) were evaluated for up to 200 thermal fatigue cycles. In addition, the electrical and thermal transport properties were evaluated for n- and p-type specimens for thermal cycling. The elastic moduli were relatively insensitive to thermal fatigue treatment. The fracture strength, σ f, of the thermally fatigued LASTT specimens was in a band of from 25 to 40 MPa while σ f of the thermally fatigued LAST ranged from 15 to 38 MPa. The thermopower and electrical conductivity of LASTT samples showed small deviations from the low temperature trend near 600 K and the data repeated well after the first temperature cycle for all samples. For the n-type LAST samples, the electrical conductivity and thermopower showed larger deviations from the low temperature trend near 500 K with some samples requiring several temperature cycles before showing repeatability in the data, suggesting a possible secondary phase in the samples.

KW - Electrical conductivity

KW - Fracture strength

KW - Thermal fatigue

KW - Thermoelectrics

KW - Thermopower

KW - Young's modulus

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U2 - 10.1016/j.matchemphys.2012.03.100

DO - 10.1016/j.matchemphys.2012.03.100

M3 - Article

AN - SCOPUS:84861529243

SN - 0254-0584

VL - 134

SP - 973

EP - 987

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials

Abstract

Funding

Keywords

ASJC Scopus subject areas

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