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Title: First-principles study, fabrication and characterization of (Zr0.25Nb0.25Ti0.25V0.25)C high-entropy ceramics

Journal Article · · Acta Materialia
 [1];  [2]; ORCiD logo [3];  [4];  [5]; ORCiD logo [1]
  1. South China Univ. of Technology (SCUT), Guangzhou (China)
  2. Northwestern Polytechnical Univ., Xi'an (China); Ames Lab., Ames, IA (United States)
  3. Ames Lab., Ames, IA (United States)
  4. Northwestern Polytechnical Univ., Xi'an (China)
  5. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

The formation possibility of a new (Zr0.25Nb0.25Ti0.25V0.25)C high-entropy ceramics (ZHC-1) was first analyzed by the first-principles calculations and thermodynamical analysis and then it was successfully fabricated by hot pressing sintering technique. The first-principles calculation results showed that the mixing enthalpy of ZHC-1 was 5.526 kJ/mol and the mixing entropy of ZHC-1 was in the range of 0.693R–1.040R. The thermodynamical analysis results showed that ZHC-1 was thermodynamically stable above 959 K owing to its negative mixing Gibbs free energy. The experimental results showed that the as-prepared ZHC-1 (95.1% relative density) possessed a single rock-salt crystal structure, some interesting nano-plate-like structures, and high compositional uniformity from nanoscale to microscale. By taking advantage of these unique features, compared with the initial metal carbides (ZrC, NbC, TiC and VC), it showed a relatively low thermal conductivity of 15.3 ± 0.3 W/(m·K) at room temperature, which was due to the presence of solid solution effects, nanoplates and porosity. Meanwhile, it exhibited the relatively high nanohardness of 30.3 ± 0.7 GPa and elastic modulus of 460.4 ± 19.2 GPa and the higher fracture toughness of 4.7 ± 0.5 MPam1/2, which were attributed to the solid solution strengthening mechanism and nanoplate pullout and microcrack deflection toughening mechanism.

Research Organization:
Ames Lab., Ames, IA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
2017YFB0703200; 51802100; 2017QNRC001; AC02-07CH11358
OSTI ID:
1556116
Alternate ID(s):
OSTI ID: 1527144; OSTI ID: 1637034
Report Number(s):
IS-J-9930
Journal Information:
Acta Materialia, Vol. 170, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 167 works
Citation information provided by
Web of Science

References (52)

Entropy-stabilized oxides journal September 2015
A new class of high-entropy perovskite oxides journal January 2018
Phase stability and distortion in high-entropy oxides journal March 2018
High-entropy fluorite oxides journal August 2018
High-Entropy Metal Diborides: A New Class of High-Entropy Materials and a New Type of Ultrahigh Temperature Ceramics journal November 2016
High-entropy ceramic thin films; A case study on transition metal diborides journal May 2018
Mechanochemical-Assisted Synthesis of High-Entropy Metal Nitride via a Soft Urea Strategy journal April 2018
Microstructure of (Hf-Ta-Zr-Nb)C high-entropy carbide at micro and nano/atomic level journal September 2018
Processing and Properties of High-Entropy Ultra-High Temperature Carbides journal June 2018
(Hf 0.2 Zr 0.2 Ta 0.2 Nb 0.2 Ti 0.2 )C high‐entropy ceramics with low thermal conductivity journal May 2018
High-entropy high-hardness metal carbides discovered by entropy descriptors journal November 2018
Phase stability and mechanical properties of novel high entropy transition metal carbides journal March 2019
First‐principles study, fabrication, and characterization of (Hf 0.2 Zr 0.2 Ta 0.2 Nb 0.2 Ti 0.2 )C high‐entropy ceramic journal January 2019
Theory of bonding in transition-metal carbides and nitrides journal October 1993
Strengthening of Ti2AlC by substituting Ti with V journal December 2005
Consolidation and mechanical properties of hot pressed TaC-HfC-VC composites journal December 2017
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Ab initiomolecular dynamics for liquid metals journal January 1993
Projector augmented-wave method journal December 1994
Generalized Gradient Approximation Made Simple journal October 1996
Special quasirandom structures journal July 1990
Multicomponent multisublattice alloys, nonconfigurational entropy and other additions to the Alloy Theoretic Automated Toolkit journal June 2009
Special points for Brillouin-zone integrations journal June 1976
Symmetry-general least-squares extraction of elastic data for strained materials from ab initio calculations of stress journal February 2002
The Voigt‐Reuss‐Hill Approximation and Elastic Moduli of Polycrystalline MgO, CaF 2 , β‐ZnS, ZnSe, and CdTe journal May 1967
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments journal June 1992
Calculations of thermophysical properties of cubic carbides and nitrides using the Debye–Grüneisen model journal February 2007
A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I, Direct Crack Measurements journal September 1981
Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity journal September 1961
Lattice Vibrations Change the Solid Solubility of an Alloy at High Temperatures journal November 2016
Computationally-driven engineering of sublattice ordering in a hexagonal AlHfScTiZr high entropy alloy journal May 2017
Synthesis and characterization of the ternary metal diboride solid‐solution nanopowders journal February 2019
Controlling phase separation of Ta x Hf 1− x C solid solution nanopowders during carbothermal reduction synthesis journal July 2017
Nanoindentation and tribology of VC, NbC and ZrC refractory carbides journal November 2017
Spark plasma sintering and mechanical behaviour of ZrC-based composites journal September 2008
Structural, mechanical and electronic properties of (TaNbHfTiZr)C high entropy carbide under pressure: Ab initio investigation journal December 2018
Structural, elastic and electronic properties of transition metal carbides TMC (TM=Ti, Zr, Hf and Ta) from first-principles calculations journal April 2011
The phase stability and mechanical properties of Nb–C system: Using first-principles calculations and nano-indentation journal June 2013
Effect of shock on transition metal carbides and nitrides {MC/N (M = Zr, Nb, Ta, Ti)} journal February 2017
The effect of Ti substitution by Zr on the microstructure and mechanical properties of the cermet Ti1-xZrxC sintered by SPS journal March 2012
Understanding the mechanical properties of vanadium carbides: Nano-indentation measurement and first-principles calculations journal January 2013
Solid solution synthesis of tantalum carbide-hafnium carbide by spark plasma sintering journal February 2017
High-temperature reactive spark plasma consolidation of TiB2–NbC ceramic composites journal November 2015
Densification behavior and mechanical properties of spark plasma-sintered ZrC–TiC and ZrC–TiC–CNT composites journal November 2012
Synthesis and phase separation of (Ti,Zr)C journal March 2014
Phase separation and toughening of SiC-AIN solid-solution ceramics journal January 1993
Phase stability, physical properties and strengthening mechanisms of concentrated solid solution alloys journal October 2017
Thermal Resistance due to Point Defects at High Temperatures journal July 1960
Thermal conductivity degradation induced by point defects in irradiated silicon carbide journal May 2011
Effect of Point Imperfections on Lattice Thermal Conductivity journal November 1960
Thermal conductivity of yttria-stabilized zirconia–hafnia solid solutions journal November 2006
Note on the thermodynamic interpretation of paramagnetic relaxation phenomena journal June 1938

Cited By (10)

High‐temperature oxidation behavior of (Hf 0.2 Zr 0.2 Ta 0.2 Nb 0.2 Ti 0.2 )C high‐entropy ceramics in air journal August 2019
Synthesis of high‐purity high‐entropy metal diboride powders by boro/carbothermal reduction journal June 2019
Densification, strengthening and toughening in hafnium carbide with the addition of silicon carbonitride journal January 2020
High-entropy pyrochlores with low thermal conductivity for thermal barrier coating materials journal July 2019
Low‐temperature molten salt synthesis of high‐entropy carbide nanopowders journal October 2019
One‐step synthesis of coral‐like high‐entropy metal carbide powders journal April 2019
High-entropy ceramics journal February 2020
High-entropy alumino-silicides: a novel class of high-entropy ceramics journal September 2019
Formation criterion for binary metal diboride solid solutions established through combinatorial methods journal January 2020
Synthesis of the ternary metal carbide solid‐solution ceramics by polymer‐derived‐ceramic route journal January 2020

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