Details
| Original language | English |
|---|---|
| Pages (from-to) | 107-112 |
| Number of pages | 6 |
| Journal | Materials Science Forum |
| Volume | 1016 |
| Publication status | Published - 5 Jan 2021 |
| Event | International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications, THERMEC 2021 - Vienna, Austria Duration: 10 May 2021 → 14 May 2021 |
Abstract
The recent revitalization of Ioffe plots (entropy conductivity versus electrical conductivity) reminds us that Isotan (Cu55Ni44Mn1) is an outstanding thermoelectric material with a power factor of up to 60 µW.cm-1.K-2 at a specific electrical conductivity of almost 20,000 S.cm-1 at elevated temperature [1, 2]. Even though, Isotan is widely used in thermoelements for temperature measurement, its high opencircuited thermal conductivity of approximately 70 µW.cm-1.K-2 [1] hindered further research as a promising thermoelectric material. Isotan was chosen as a starting composition. Influence of partial substitution of Cu and Ni with heavy elements (Sn,W) on the thermoelectric properties was studied. The alloys were fabricated by arcmelting and microstructurally characterized for grain size and elemental composition by scanning electron microscope (SEM) combined with energydispersive Xray (EDXS). Lattice symmetry and parameters were estimated by Xray diffraction (XRD). Functional properties as Seebeck coefficient, electrical conductivity and power factor were used to evaluate the thermoelectric performance.
Keywords
- Cu-Ni-based alloys, Microstructure, Power factor, Thermoelectrics
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials Science Forum, Vol. 1016, 05.01.2021, p. 107-112.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Evaluation of CuNiBased Alloys for Thermoelectric Energy Conversion
AU - Steinhoff, Timon
AU - Wolf, Mario
AU - Nürnberger, Florian
AU - Gerstein, Gregory
AU - Feldhoff, Armin
PY - 2021/1/5
Y1 - 2021/1/5
N2 - The recent revitalization of Ioffe plots (entropy conductivity versus electrical conductivity) reminds us that Isotan (Cu55Ni44Mn1) is an outstanding thermoelectric material with a power factor of up to 60 µW.cm-1.K-2 at a specific electrical conductivity of almost 20,000 S.cm-1 at elevated temperature [1, 2]. Even though, Isotan is widely used in thermoelements for temperature measurement, its high opencircuited thermal conductivity of approximately 70 µW.cm-1.K-2 [1] hindered further research as a promising thermoelectric material. Isotan was chosen as a starting composition. Influence of partial substitution of Cu and Ni with heavy elements (Sn,W) on the thermoelectric properties was studied. The alloys were fabricated by arcmelting and microstructurally characterized for grain size and elemental composition by scanning electron microscope (SEM) combined with energydispersive Xray (EDXS). Lattice symmetry and parameters were estimated by Xray diffraction (XRD). Functional properties as Seebeck coefficient, electrical conductivity and power factor were used to evaluate the thermoelectric performance.
AB - The recent revitalization of Ioffe plots (entropy conductivity versus electrical conductivity) reminds us that Isotan (Cu55Ni44Mn1) is an outstanding thermoelectric material with a power factor of up to 60 µW.cm-1.K-2 at a specific electrical conductivity of almost 20,000 S.cm-1 at elevated temperature [1, 2]. Even though, Isotan is widely used in thermoelements for temperature measurement, its high opencircuited thermal conductivity of approximately 70 µW.cm-1.K-2 [1] hindered further research as a promising thermoelectric material. Isotan was chosen as a starting composition. Influence of partial substitution of Cu and Ni with heavy elements (Sn,W) on the thermoelectric properties was studied. The alloys were fabricated by arcmelting and microstructurally characterized for grain size and elemental composition by scanning electron microscope (SEM) combined with energydispersive Xray (EDXS). Lattice symmetry and parameters were estimated by Xray diffraction (XRD). Functional properties as Seebeck coefficient, electrical conductivity and power factor were used to evaluate the thermoelectric performance.
KW - Cu-Ni-based alloys
KW - Microstructure
KW - Power factor
KW - Thermoelectrics
UR - http://www.scopus.com/inward/record.url?scp=85100880016&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.1016.107
DO - 10.4028/www.scientific.net/MSF.1016.107
M3 - Article
AN - SCOPUS:85100880016
VL - 1016
SP - 107
EP - 112
JO - Materials Science Forum
JF - Materials Science Forum
SN - 0255-5476
T2 - International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications, THERMEC 2021
Y2 - 10 May 2021 through 14 May 2021
ER -