Thermoelectric properties of AlPdRe icosahedral alloys

• Published in: Journal of alloys and compounds Vol. 342; no. 1; pp. 469 - 472
• Main Authors: Kirihara, K, Nagata, T, Kimura, K
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 14-08-2002; Elsevier
• Subjects: Applied sciences; Bonding nature; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; Metals. Metallurgy; Physics; Quasicrystals; Thermoelectric and thermomagnetic effects; Thermoelectric properties; Quasicrystals; Bonding nature; Thermoelectric properties; Quaternary alloys; Aluminium base alloys; Electrical conductivity; Composition effect; Ruthenium alloys; Seebeck effect; Electronic density of states; Experimental study; Icosahedral phase; Fermi level; Palladium alloys; Thermoelectric power; Thermal conductivity; Chemical composition; Figure of merit; Rhenium alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(02)00278-5

Seebeck coefficient,
S, electrical conductivity,
σ, and thermal conductivity,
κ, of AlPdRe icosahedral alloys are investigated. As concentration of transition metal (either Pd or Re) is increased,
S increases. The strong composition dependences of
S and
σ relate to the spikiness in electronic density of states at Fermi energy, and to the variation in bonding nature between Al and TM. The thermoelectric figure of merit also reveals strong composition dependence and thus gives a possibility of good thermoelectric performance. Effect of Ru addition for the thermoelectric property is also presented.