Title :
Carrier density behaviour during ageing of doped plasma spray formed iron disilicide [thermoelectric material]
Author :
Schackenberg, K. ; Müller, E. ; Schilz, J. ; Ernst, Herbert ; Kaysser, W.A.
Author_Institution :
Inst. of Mater. Res., German Aerosp. Center, Koln, Germany
Abstract :
The relations between the microstructure and the thermoelectric transport properties of plasma spray formed FeSi2:Al and FeSi 2:Co have been investigated in order to identify process variations and spraying conditions to obtain an advantageous thermoelectric performance. Samples from two different plasma spraying techniques have been compared to hot pressed FeSi2. The characterisation of the material comprises the determination of the phase composition by XRD, and measurements of the Hall mobility, the charge carrier density, the Seebeck coefficient and the electrical and thermal conductivity. The long term stability has been investigated in a consecutive heat treatment at 800°C, lasting up to 1000 h
Keywords :
aluminium; carrier density; cobalt; iron alloys; plasma arc sprayed coatings; plasma arc spraying; silicon alloys; thermoelectric conversion; thermoelectricity; 1000 h; 800 C; FeSi2; FeSi2:Al; FeSi2:Co; Hall mobility measurement; Seebeck coefficient; XRD; carrier density behaviour; characterisation; charge carrier density; electrical conductivity; heat treatment; long term stability; phase composition; plasma spray formation; plasma spraying techniques; process variations; spraying conditions; thermal conductivity; thermoelectric material; Aging; Charge carrier density; Composite materials; Microstructure; Plasma density; Plasma properties; Plasma transport processes; Thermal conductivity; Thermal spraying; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740408
