The superlattice (SL) structure, which can efficiently suppress phonon thermal transport, has important implications for materials design in thermal insulating and thermoelectric applications. In this work, we prepare periodic ultra-high-temperature ceramic SLs made of transition metal carbides HfC and TaC with SL interface spacing ranging from 9.5 to 84.5 nm. The measured cross-plane phonon thermal conductivity displays a crossover dependence on SL interface spacing, achieving a minimum value of 0.84 W m−1 K−1 at room temperature. Moreover, the SLs with small interface spacing (9.5 and 14.7 nm) even show higher thermal conductivity than the constituent materials. The interfacial thermal resistance for HfC/TaC interface is determined from both a prepared single-interface double-layer sample and the thermal conductivity data of SLs, which is found to be a considerably large value for ceramic material interfaces. We further resolve the electron and phonon components of the interfacial thermal resistance. Finally, thermal stability of SLs is evaluated at 1200 °C in air, and a thin HfO2 cap layer is shown to effectively protect against high-temperature oxidation and preserve the thermal insulating property to a good extent.
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Thermal transport properties of ultra-high-temperature ceramic superlattices
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14 April 2025
Research Article|
April 15 2025
Thermal transport properties of ultra-high-temperature ceramic superlattices
Xin Liang
;
Xin Liang
a)
(Conceptualization, Formal analysis, Investigation, Methodology, Supervision, Visualization, Writing – original draft, Writing – review & editing)
1
College of Materials Science and Engineering, Beijing University of Chemical Technology
, Beijing 100029, China
2
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences
, Beijing 101400, China
3
School of Nanoscience and Engineering, University of Chinese Academy of Sciences
, Beijing 100049, China
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Shuhang Yang
Shuhang Yang
(Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – original draft)
2
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences
, Beijing 101400, China
3
School of Nanoscience and Engineering, University of Chinese Academy of Sciences
, Beijing 100049, China
Search for other works by this author on:
1
College of Materials Science and Engineering, Beijing University of Chemical Technology
, Beijing 100029, China
2
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences
, Beijing 101400, China
3
School of Nanoscience and Engineering, University of Chinese Academy of Sciences
, Beijing 100049, China
a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 126, 153904 (2025)
Article history
Received:
February 05 2025
Accepted:
April 02 2025
Citation
Xin Liang, Shuhang Yang; Thermal transport properties of ultra-high-temperature ceramic superlattices. Appl. Phys. Lett. 14 April 2025; 126 (15): 153904. https://doi.org/10.1063/5.0263593
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