skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Liquid-to-liquid crossover in the GaIn eutectic alloy

Abstract

Liquid-liquid crossover is promising and closely related to the atomic dynamics during heating and cooling processes. Here we reveal a reversible structural crossover in the liquid Ga85.8In14.2 eutectic alloys by using in situ synchrotron x-ray diffraction and ab initio molecular dynamics simulation. A kink always appears on the temperature dependent behaviors of density, ratio of the second peak position to the first in the pair correlation function, coordination number, heat capacity, free energy, and atomic diffusivity in the temperature range of about 400–550 K. It is likely ascribed to atomic rearrangements of Ga and In atoms from a relative random packing at high temperatures to a relative nonuniform packing at low temperatures, in which In atoms prefer to have more In neighbors. This observation will promote more understanding of the liquid structure of eutectic alloys

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Key Research and Development Program of China; Fundamental Research Funds for the Central Universities; National Natural Science Foundation of China (NNSFC); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
OSTI Identifier:
1392447
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 95; Journal Issue: 22
Country of Publication:
United States
Language:
English

Citation Formats

Yu, Q., Wang, X. D., Su, Y., Cao, Q. P., Ren, Y., Zhang, D. X., and Jiang, J. Z.. Liquid-to-liquid crossover in the GaIn eutectic alloy. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.224203.
Yu, Q., Wang, X. D., Su, Y., Cao, Q. P., Ren, Y., Zhang, D. X., & Jiang, J. Z.. Liquid-to-liquid crossover in the GaIn eutectic alloy. United States. doi:10.1103/PhysRevB.95.224203.
Yu, Q., Wang, X. D., Su, Y., Cao, Q. P., Ren, Y., Zhang, D. X., and Jiang, J. Z.. Thu . "Liquid-to-liquid crossover in the GaIn eutectic alloy". United States. doi:10.1103/PhysRevB.95.224203.
@article{osti_1392447,
title = {Liquid-to-liquid crossover in the GaIn eutectic alloy},
author = {Yu, Q. and Wang, X. D. and Su, Y. and Cao, Q. P. and Ren, Y. and Zhang, D. X. and Jiang, J. Z.},
abstractNote = {Liquid-liquid crossover is promising and closely related to the atomic dynamics during heating and cooling processes. Here we reveal a reversible structural crossover in the liquid Ga85.8In14.2 eutectic alloys by using in situ synchrotron x-ray diffraction and ab initio molecular dynamics simulation. A kink always appears on the temperature dependent behaviors of density, ratio of the second peak position to the first in the pair correlation function, coordination number, heat capacity, free energy, and atomic diffusivity in the temperature range of about 400–550 K. It is likely ascribed to atomic rearrangements of Ga and In atoms from a relative random packing at high temperatures to a relative nonuniform packing at low temperatures, in which In atoms prefer to have more In neighbors. This observation will promote more understanding of the liquid structure of eutectic alloys},
doi = {10.1103/PhysRevB.95.224203},
journal = {Physical Review B},
number = 22,
volume = 95,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}
  • Abundance distributions of ionic and neutral clusters sputtered by 4 keV argon ion impacts on a liquid gallium-aluminum eutectic alloy have been measured by time-of-flight mass spectrometry. To photoionize the neutral species, a 193 nm (6.4 eV) ArF laser has been used. Neutral and ionic clusters as large as Ga{sub 14} and mixed clusters of the form Ga{sub {ital n}}Al with {ital n}{le}13 were detected. The abundance of the monoaluminum mixed clusters is found to increase with nuclearity and is discussed as the consequence of an increasing clusters depth of origin as the nuclearity increases. A comparison of the resultsmore » with those obtained from the gallium-indium eutectic alloy reveals a similar cluster nuclearity dependence of the depth of origin. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.« less
  • A two-dimensional crystalline layer is found at the surface of the liquid eutectic Au82Si18 alloy above its melting point TM=359 C. Underlying this crystalline layer, we find a layered structure, 6-7 atomic layers thick. This surface layer undergoes a first-order solid-solid phase transition occurring at 371 C. The crystalline phase observed for T>371 C is stable up to at least 430 C. Grazing-incidence x-ray diffraction data at T>371 C imply lateral order comprising two coexisting phases of different oblique unit cells, in stark contrast with the single phase with a rectangular unit cell found for low-temperature crystalline phase, 359 C<T<371more » C.« less