Techniques for Mitigating Thermal Fatigue Degradation, Controlling Efficiency, and Extending Lifetime in a ZnO Thermoelectric Using Grain Size Gradient FGMs

Corson L. Cramer, Wenjie Li, Zhi He Jin, Jue Wang, Kaka Ma, Troy B. Holland

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A functionally graded material (FGM) in terms of grain size gradation is fabricated using zinc oxide (ZnO) with spark plasma sintering and an additive manufacturing technique by diffusion bonding layers of material sintered at different temperatures to achieve a thermoelectric generator (TEG) material that can dissipate heat well and retain high energy conversion efficiency for longer-lasting and comparably efficient TEGs. This FGM is compared to a previously made FGM with continuous grain size gradation. Uniform and graded grain size conditions are modeled for thermoelectric output by using thermoelectric properties of the uniform grain size as well as the varying properties seen in the FGMs. The actual thermoelectric output of the samples is measured and compared to the simulations. The grain size has a large effect on the efficiency and efficiency range. The samples are thermally cycled with a fast heating rate to test the thermal stress robustness and degradation, and the resistance at the highest temperature is measured to indicate degradation from thermal stress. The measured efficiency after cycling shows that the FGMs survive longer lifetime than that with uniform small grains.

Original languageEnglish (US)
Pages (from-to)866-872
Number of pages7
JournalJournal of Electronic Materials
Volume47
Issue number1
DOIs
StatePublished - Jan 1 2018

Fingerprint

functionally gradient materials
Zinc Oxide
thermal fatigue
Thermal fatigue
Functionally graded materials
Zinc oxide
zinc oxides
grain size
degradation
Degradation
life (durability)
gradients
thermal stresses
Thermal stress
3D printers
thermoelectric generators
diffusion welding
Diffusion bonding
Spark plasma sintering
energy conversion efficiency

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

@article{42b2cb45df6f4e54b55fa5dd7c867d9f,
title = "Techniques for Mitigating Thermal Fatigue Degradation, Controlling Efficiency, and Extending Lifetime in a ZnO Thermoelectric Using Grain Size Gradient FGMs",
abstract = "A functionally graded material (FGM) in terms of grain size gradation is fabricated using zinc oxide (ZnO) with spark plasma sintering and an additive manufacturing technique by diffusion bonding layers of material sintered at different temperatures to achieve a thermoelectric generator (TEG) material that can dissipate heat well and retain high energy conversion efficiency for longer-lasting and comparably efficient TEGs. This FGM is compared to a previously made FGM with continuous grain size gradation. Uniform and graded grain size conditions are modeled for thermoelectric output by using thermoelectric properties of the uniform grain size as well as the varying properties seen in the FGMs. The actual thermoelectric output of the samples is measured and compared to the simulations. The grain size has a large effect on the efficiency and efficiency range. The samples are thermally cycled with a fast heating rate to test the thermal stress robustness and degradation, and the resistance at the highest temperature is measured to indicate degradation from thermal stress. The measured efficiency after cycling shows that the FGMs survive longer lifetime than that with uniform small grains.",
author = "Cramer, {Corson L.} and Wenjie Li and Jin, {Zhi He} and Jue Wang and Kaka Ma and Holland, {Troy B.}",
year = "2018",
month = "1",
day = "1",
doi = "10.1007/s11664-017-5879-9",
language = "English (US)",
volume = "47",
pages = "866--872",
journal = "Journal of Electronic Materials",
issn = "0361-5235",
publisher = "Springer New York",
number = "1",

}

Techniques for Mitigating Thermal Fatigue Degradation, Controlling Efficiency, and Extending Lifetime in a ZnO Thermoelectric Using Grain Size Gradient FGMs. / Cramer, Corson L.; Li, Wenjie; Jin, Zhi He; Wang, Jue; Ma, Kaka; Holland, Troy B.

In: Journal of Electronic Materials, Vol. 47, No. 1, 01.01.2018, p. 866-872.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Techniques for Mitigating Thermal Fatigue Degradation, Controlling Efficiency, and Extending Lifetime in a ZnO Thermoelectric Using Grain Size Gradient FGMs

AU - Cramer, Corson L.

AU - Li, Wenjie

AU - Jin, Zhi He

AU - Wang, Jue

AU - Ma, Kaka

AU - Holland, Troy B.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - A functionally graded material (FGM) in terms of grain size gradation is fabricated using zinc oxide (ZnO) with spark plasma sintering and an additive manufacturing technique by diffusion bonding layers of material sintered at different temperatures to achieve a thermoelectric generator (TEG) material that can dissipate heat well and retain high energy conversion efficiency for longer-lasting and comparably efficient TEGs. This FGM is compared to a previously made FGM with continuous grain size gradation. Uniform and graded grain size conditions are modeled for thermoelectric output by using thermoelectric properties of the uniform grain size as well as the varying properties seen in the FGMs. The actual thermoelectric output of the samples is measured and compared to the simulations. The grain size has a large effect on the efficiency and efficiency range. The samples are thermally cycled with a fast heating rate to test the thermal stress robustness and degradation, and the resistance at the highest temperature is measured to indicate degradation from thermal stress. The measured efficiency after cycling shows that the FGMs survive longer lifetime than that with uniform small grains.

AB - A functionally graded material (FGM) in terms of grain size gradation is fabricated using zinc oxide (ZnO) with spark plasma sintering and an additive manufacturing technique by diffusion bonding layers of material sintered at different temperatures to achieve a thermoelectric generator (TEG) material that can dissipate heat well and retain high energy conversion efficiency for longer-lasting and comparably efficient TEGs. This FGM is compared to a previously made FGM with continuous grain size gradation. Uniform and graded grain size conditions are modeled for thermoelectric output by using thermoelectric properties of the uniform grain size as well as the varying properties seen in the FGMs. The actual thermoelectric output of the samples is measured and compared to the simulations. The grain size has a large effect on the efficiency and efficiency range. The samples are thermally cycled with a fast heating rate to test the thermal stress robustness and degradation, and the resistance at the highest temperature is measured to indicate degradation from thermal stress. The measured efficiency after cycling shows that the FGMs survive longer lifetime than that with uniform small grains.

UR - http://www.scopus.com/inward/record.url?scp=85032201495&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85032201495&partnerID=8YFLogxK

U2 - 10.1007/s11664-017-5879-9

DO - 10.1007/s11664-017-5879-9

M3 - Article

AN - SCOPUS:85032201495

VL - 47

SP - 866

EP - 872

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

SN - 0361-5235

IS - 1

ER -