TY - JOUR
T1 - Thermoelectric properties of Al-Pd-Re quasicrystal sintered by Spark Plasma Sintering (SPS)
T2 - effect of improvement of microstructure
AU - Takagiwa, Yoshiki
AU - Kamimura, Takahiko
AU - Hosoi, Sizuka
AU - Okada, Junpei Tamura
AU - Kimura, Kaoru
N1 - Funding Information:
ities of the Materials Design and Characterization Laboratory, Institute for Solid State Physics, the University of Tokyo. This work is partly supported by a Grant-in-Aid for Scientific Research from JSPS and the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT).
PY - 2009
Y1 - 2009
N2 - We report the thermoelectric properties of poly-grain Al-Pd-Re icosahedral quasicrystals and discuss an effect of improvement of their microstructure. The improvement of microstructure by using Spark Plasma Sintering (SPS) method resulted into a large increase of the electrical conductivity but less increase of the thermal conductivity. The relative density dramatically increased up to more than 90% by SPS. On the other hand, the microstructure itself does not have critical influence on the Seebeck coefficient, which is found to be strongly correlated with e/a (sample's compositions). Consequently, the dimensionless figure of merit (ZT) increased three times from 0.05 to 0.15.
AB - We report the thermoelectric properties of poly-grain Al-Pd-Re icosahedral quasicrystals and discuss an effect of improvement of their microstructure. The improvement of microstructure by using Spark Plasma Sintering (SPS) method resulted into a large increase of the electrical conductivity but less increase of the thermal conductivity. The relative density dramatically increased up to more than 90% by SPS. On the other hand, the microstructure itself does not have critical influence on the Seebeck coefficient, which is found to be strongly correlated with e/a (sample's compositions). Consequently, the dimensionless figure of merit (ZT) increased three times from 0.05 to 0.15.
KW - Al-Pd-Re
KW - Microstructure
KW - Quasicrystals
KW - Spark Plasma Sintering (SPS)
KW - Thermoelectric properties
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U2 - 10.1524/zkri.2009.1080
DO - 10.1524/zkri.2009.1080
M3 - Article
AN - SCOPUS:63849122951
SN - 0044-2968
VL - 224
SP - 79
EP - 83
JO - Zeitschfrift fur Kristallographie
JF - Zeitschfrift fur Kristallographie
IS - 1-2
ER -