(Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C high‐entropy ceramics with low thermal conductivity
CONSTANTIN, Loic
Department of Electrical Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Department of Electrical Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
CONSTANTIN, Loic
Department of Electrical Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Department of Electrical Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
NASTASI, Michael
Department of Mechanical & Materials Engineering
Nebraska Center for Materials and Nanoscience
Nebraska Center for Energy Sciences Research
Department of Mechanical & Materials Engineering
Nebraska Center for Materials and Nanoscience
Nebraska Center for Energy Sciences Research
CUI, Bai
Department of Mechanical & Materials Engineering
Nebraska Center for Materials and Nanoscience
< Reduce
Department of Mechanical & Materials Engineering
Nebraska Center for Materials and Nanoscience
Language
en
Article de revue
This item was published in
Journal of the American Ceramic Society. 2018-10, vol. 101, n° 10, p. 4486-4491
Wiley
English Abstract
A novel high‐entropy carbide ceramic, (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C, with a single‐phase rock salt structure, was synthesized by spark plasma sintering. X‐ray diffraction confirmed the formation of a single‐phase rock salt ...Read more >
A novel high‐entropy carbide ceramic, (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C, with a single‐phase rock salt structure, was synthesized by spark plasma sintering. X‐ray diffraction confirmed the formation of a single‐phase rock salt structure at 26‐1140°C in Argon atmosphere, in which the 5 metal elements may share a cation position while the C element occupies the anion position. (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C exhibits a much lower thermal diffusivity and conductivity than the binary carbides HfC, ZrC, TaC, and TiC, which may result from the significant phonon scattering at its distorted anion sublattice. (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C inherits the high elastic modulus and hardness of the binary carbide ceramics.Read less <
English Keywords
high-entropy ceramics
microstructure
spark plasma sintering
thermal conductivity
Origin
Hal imported