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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1524368
Alternate Identifier(s):
OSTI ID: 1548695
Report Number(s):
LA-UR-17-28921
Journal ID: ISSN 0966-9795
Grant/Contract Number:  
89233218CNA000001; NA0001982; NA0001974; AC02-06CH11357; FG02-99ER45775
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Intermetallics
Additional Journal Information:
Journal Volume: 95; Journal Issue: C; Journal ID: ISSN 0966-9795
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High-pressure; Equation of state; thermoelectric material; half-Heusler; Seebeck coefficient

Citation Formats

Baker, Jason L., Kumar, Ravhi S., Park, Changyong, Velisavljevic, Nenad, and Cornelius, Andrew. Compressibility and thermoelectric behavior of TiCoSb half-Heusler compound at high pressures. United States: N. p., 2018. Web. doi:10.1016/j.intermet.2018.02.006.
Baker, Jason L., Kumar, Ravhi S., Park, Changyong, Velisavljevic, Nenad, & Cornelius, Andrew. Compressibility and thermoelectric behavior of TiCoSb half-Heusler compound at high pressures. United States. doi:10.1016/j.intermet.2018.02.006.
Baker, Jason L., Kumar, Ravhi S., Park, Changyong, Velisavljevic, Nenad, and Cornelius, Andrew. Sun . "Compressibility and thermoelectric behavior of TiCoSb half-Heusler compound at high pressures". United States. doi:10.1016/j.intermet.2018.02.006. https://www.osti.gov/servlets/purl/1524368.
@article{osti_1524368,
title = {Compressibility and thermoelectric behavior of TiCoSb half-Heusler compound at high pressures},
author = {Baker, Jason L. and Kumar, Ravhi S. and Park, Changyong and Velisavljevic, Nenad and Cornelius, Andrew},
abstractNote = {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.},
doi = {10.1016/j.intermet.2018.02.006},
journal = {Intermetallics},
issn = {0966-9795},
number = C,
volume = 95,
place = {United States},
year = {2018},
month = {4}
}

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Figures / Tables:

Figure 1 Figure 1: The MgAgAs crystal structure of TiCoSb.

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