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

17 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

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 B.V.",

number = "2-3",

}

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

Keywords

ASJC Scopus subject areas

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