Local atomic structure inheritance in Ag{sub 50}Sn{sub 50} melt
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061 (China)
- Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204 (China)
Local structure inheritance signatures were observed during the alloying process of the Ag{sub 50}Sn{sub 50} melt, using high-temperature X-ray diffraction and ab initio molecular dynamics simulations. The coordination number N{sub m} around Ag atom is similar in the alloy and in pure Ag melts (N{sub m} ∼ 10), while, during the alloying process, the local structure around Sn atoms rearranges. Sn-Sn covalent bonds were substituted by Ag-Sn chemical bonds, and the total coordination number around Sn increases by about 70% as compared with those in the pure Sn melt. Changes in the electronic structure of the alloy have been studied by Ag and Sn K-edge X-ray absorption spectroscopy, as well as by calculations of the partial density of states. We propose that a leading mechanism for local structure inheritance in Ag{sub 50}Sn{sub 50} is due to s-p dehybridization of Sn and to the interplay between Sn-s and Ag-d electrons.
- OSTI ID:
- 22275661
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
CHEMICAL BONDS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
COORDINATION NUMBER
ELECTRONIC STRUCTURE
ELECTRONS
INTERMETALLIC COMPOUNDS
MOLECULAR DYNAMICS METHOD
SILVER
TEMPERATURE DEPENDENCE
TIN
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY