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Title: Tailoring the physical properties of Ni-based single-phase equiatomic alloys by modifying the chemical complexity

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep20159· OSTI ID:1237152
 [1];  [1];  [1];  [1];  [2];  [3];  [3];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

We discovered that equiatomic alloys (e.g. high entropy alloys) have recently attracted considerable interest due to their exceptional properties, which might be closely related to their extreme disorder induced by the chemical complexity. To understand the effects of chemical complexity on their fundamental physical properties, a family of (eight) Ni-based, face-center-cubic (FCC), equiatomic alloys, extending from elemental Ni to quinary high entropy alloys, has been synthesized, and their electrical, thermal, and magnetic properties are systematically investigated in the range of 4–300 K by combining experiments with ab initio Korring-Kohn-Rostoker coherent-potential-approximation (KKR-CPA) calculations. The scattering of electrons is significantly increased due to the chemical (especially magnetic) disorder. It has weak correlation with the number of elements but strongly depends on the type of elements. Thermal conductivities of the alloys are largely lower than pure metals, primarily because the high electrical resistivity suppresses the electronic thermal conductivity. Moreover, the temperature dependence of the electrical and thermal transport properties is further discussed, and the magnetization of five alloys containing three or more elements is measured in magnetic fields up to 4 T.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; AC52-07NA27344
OSTI ID:
1237152
Alternate ID(s):
OSTI ID: 1260493
Report Number(s):
LLNL-JRNL-695258; KC0207010; ERKCM99
Journal Information:
Scientific Reports, Vol. 6; Related Information: EDDE partners with Oak Ridge National Laboratory (lead); Lawrence Livermore National Laboratory; University of Michigan; University of Tennessee; University of Wisconsin; University of Wyoming; Virginia Tech; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 162 works
Citation information provided by
Web of Science

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Unique Challenges for Modeling Defect Dynamics in Concentrated Solid-Solution Alloys journal July 2017
Phonon broadening in high entropy alloys journal September 2017
Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys journal January 2019
The origin of Mooij correlations in disordered metals journal September 2018
First-principles investigation of the micromechanical properties of fcc-hcp polymorphic high-entropy alloys journal July 2018
Effects of electronic excitation in 150 keV Ni ion irradiation of metallic systems journal January 2018
Perspective on ab initio phonon thermal transport journal August 2019
Effects of electron–phonon coupling on damage accumulation in molecular dynamics simulations of irradiated nickel journal August 2019
Toughening of a low-activation tungsten alloy using tungsten short fibers and particles reinforcement for fusion plasma-facing applications journal December 2018
Pressure effects on the electronic structure and superconductivity of ( TaNb ) 0.67 ( HfZrTi ) 0.33 high entropy alloy journal November 2019
Hidden Mn magnetic-moment disorder and its influence on the physical properties of medium-entropy NiCoMn solid solution alloys journal January 2019
Impact of interstitial C on phase stability and stacking-fault energy of the CrMnFeCoNi high-entropy alloy journal November 2019
Role of magnetism in the stability of the high-entropy alloy CoCrFeMnNi and its derivatives journal December 2019
Peculiarities of deformation of CoCrFeMnNi at cryogenic temperatures journal July 2018
Irradiation responses and defect behavior of single-phase concentrated solid solution alloys journal September 2018
Electronic transport and phonon properties of maximally disordered alloys: From binaries to high-entropy alloys journal September 2018
High-entropy functional materials journal September 2018
Lattice Distortions in the FeCoNiCrMn High Entropy Alloy Studied by Theory and Experiment journal September 2016
Impact of Chemical Fluctuations on Stacking Fault Energies of CrCoNi and CrMnFeCoNi High Entropy Alloys from First Principles journal August 2018
Evaluation of Radiation Response in CoCrFeCuNi High-Entropy Alloys journal October 2018
Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys text January 2017
Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys text January 2019
Peculiarities of deformation of CoCrFeMnNi at cryogenic temperatures text January 2018
Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys [Supplementary Data] preprint December 2017
Delayed damage accumulation by athermal suppression of defect production in concentrated solid solution alloys journal December 2017
Hidden Mn magnetic-moment disorder and its influence on the physical properties of medium-entropy NiCoMn solid solution alloys text January 2019
The origin of Mooij correlations in disordered metals text January 2018
Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys text January 2018
Extreme Fermi surface smearing in a maximally disordered concentrated solid solution text January 2020
Predictive multiphase evolution in Al-containing high-entropy alloys journal October 2018
Quantum Critical Behavior in a Concentrated Ternary Solid Solution preprint January 2016