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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
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 Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1237152
Alternate Identifier(s):
OSTI ID: 1260493
Report Number(s):
LLNL-JRNL-695258
Journal ID: ISSN 2045-2322; KC0207010; ERKCM99
Grant/Contract Number:  
AC05-00OR22725; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 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; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; magnetic materials; metal and alloys; 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; metals and alloys

Citation Formats

Jin, Ke, Sales, Brian C., Stocks, George Malcolm, Samolyuk, German D., Daene, Markus, Weber, William J., Zhang, Yanwen, and Bei, Hongbin. Tailoring the physical properties of Ni-based single-phase equiatomic alloys by modifying the chemical complexity. United States: N. p., 2016. Web. doi:10.1038/srep20159.
Jin, Ke, Sales, Brian C., Stocks, George Malcolm, Samolyuk, German D., Daene, Markus, Weber, William J., Zhang, Yanwen, & Bei, Hongbin. Tailoring the physical properties of Ni-based single-phase equiatomic alloys by modifying the chemical complexity. United States. https://doi.org/10.1038/srep20159
Jin, Ke, Sales, Brian C., Stocks, George Malcolm, Samolyuk, German D., Daene, Markus, Weber, William J., Zhang, Yanwen, and Bei, Hongbin. Mon . "Tailoring the physical properties of Ni-based single-phase equiatomic alloys by modifying the chemical complexity". United States. https://doi.org/10.1038/srep20159. https://www.osti.gov/servlets/purl/1237152.
@article{osti_1237152,
title = {Tailoring the physical properties of Ni-based single-phase equiatomic alloys by modifying the chemical complexity},
author = {Jin, Ke and Sales, Brian C. and Stocks, George Malcolm and Samolyuk, German D. and Daene, Markus and Weber, William J. and Zhang, Yanwen and Bei, Hongbin},
abstractNote = {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.},
doi = {10.1038/srep20159},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 2016},
month = {Mon Feb 01 00:00:00 EST 2016}
}

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