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Title: Compressibility and thermoelectric behavior of TiCoSb half-Heusler compound at high pressures

Journal Article · · Intermetallics
 [1]; ORCiD logo [1];  [2];  [3];  [1]
  1. Univ. of Nevada, Las Vegas, NV (United States)
  2. Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab., High Pressure Collaborative Access Team (HPCAT)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We have performed high-pressure structural, electrical, and thermal property measurements on half-Heusler thermoelectric compound, TiCoSb. High-pressure powder diffraction measurements have been performed in an angle-dispersive geometry using synchrotron x-rays up to 115 GPa using a diamond anvil cell. The results show the cubic crystal structure (F-43m) stable and no pressure induced structural phase transitions were observed over the entire pressure range. The electrical and thermal properties were studied up to 5 GPa using a Paris-Edinburgh press equipped with a specialized sample cell assembly. The compressibility, variation of thermal conductivity, Seebeck co-efficient and thermoelectric figure of merit (ZT) for the material are discussed in detail.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001; NA0001982; NA0001974; AC02-06CH11357; FG02-99ER45775
OSTI ID:
1524368
Alternate ID(s):
OSTI ID: 1548695
Report Number(s):
LA-UR-17-28921
Journal Information:
Intermetallics, Vol. 95, Issue C; ISSN 0966-9795
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (1)

Strategies and challenges of high-pressure methods applied to thermoelectric materials journal June 2019

Figures / Tables (10)