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

fYear

1998

fDate

24-28 May 1998

Firstpage

422

Lastpage

425

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on

Conference_Location

Nagoya

ISSN

1094-2734

Print_ISBN

0-7803-4907-5

Type

conf

DOI

10.1109/ICT.1998.740408

Filename

740408