期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.205501
关键词
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资金
- Energy Dissipation to Defect Evolution (EDDE), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy of Sciences
- National Science Foundation
- National Institutes of Health/National Institute of General Medical Sciences under NSF Grant [DMR-1332208]
Multielement solid solution alloys are intrinsically disordered on the atomic scale, and many of their advanced properties originate from the local structural characteristics. The local structure of a NiCoCr solid solution alloy is measured with x-ray or neutron total scattering and extended x-ray absorption fine structure (EXAFS) techniques. The atomic pair distribution function analysis does not exhibit an observable structural distortion. However, an EXAFS analysis suggests that the Cr atoms are favorably bonded with Ni and Co in the solid solution alloys. This short-range order (SRO) may make an important contribution to the low values of the electrical and thermal conductivities of the Cr-alloyed solid solutions. In addition, an EXAFS analysis of Ni ion irradiated samples reveals that the degree of SRO in NiCoCr alloys is enhanced after irradiation.
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