TiNiSn: A gateway to the (1,1,1) intermetallic compounds
- Ames Lab., IA (United States)
- Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science and Engineering
Recent awareness of the transport properties of Skutterudite pnictides has stimulated an interest in numerous other intermetallic compounds having a gap in the density of states at the Fermi level including the MNiSn compounds where M = (Ti, Zr, Hf). These intermetallic half-Heusler compounds are characterized by high Seebeck coefficients ({minus}150 to {minus}300 {micro}V/deg.) and reasonable carrier mobilities (30 to 50 cm{sup 2}/V-s) at room temperature which make them attractive candidates for intermediate temperature thermoelectric applications. Samples of TiNiSn were prepared by arc melting and homogenized by heat treatment. The temperature dependence of the electrical resistivity, Seebeck coefficient, and thermal diffusivity of these samples was characterized between 22 C and 900 C. The electrical resistivity and thermopower both decrease with temperature although the resistivity decreases at a faster rate. Electrical power factors in excess of 25 {micro}W/cm-C{sup 2} were observed in nearly single phase alloys within a 300 to 600 C temperature range. A brief survey of other selected ternary intermetallic compounds is also presented.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 244657
- Report Number(s):
- IS-M-853; CONF-960334-2; ON: DE96011232; TRN: AHC29613%%132
- Resource Relation:
- Conference: 15. International conference on Thermoelectrics (ICT 96), Pasadena, CA (United States), 26-29 Mar 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
TITANIUM ALLOYS
THERMAL DIFFUSIVITY
ELECTRICAL PROPERTIES
NICKEL ALLOYS
TIN ALLOYS
THERMOELECTRIC MATERIALS
SEEBECK EFFECT
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
EXPERIMENTAL DATA
ZIRCONIUM ALLOYS
HAFNIUM ALLOYS