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

Title: Effect of stress on melting of rhombohedral bismuth

Abstract

In this paper, pressure-induced melting of rhombohedral bismuth (Bi-I) has been investigated in the solid pressure medium of NaCl and the hydrostatic medium of neon at high temperatures by in-situ synchrotron x-ray diffraction. Upon compression from ~ 0.7 GPa to 3.2 GPa at (or below) 489 K, Bi-I melts into a liquid between ~ 1.2 and 1.6 GPa in the solid pressure medium and then crystallizes into Bi-IV at ~ 2.9 GPa. However, at the same temperature of 489 K, Bi-I transforms to a crystalline phase (Bi-II' or Bi-II) at ~ 1.8 GPa under hydrostatic conditions, followed by a transformation to Bi-IV at 2.5 GPa. Our x-ray diffraction results indicate that the melting of Bi-I at (or below) 489 K is due to the stress. There is a stress effect on the structural deformation of Bi-I when the solid pressure medium is used, viz., pressure-dependent c/a for Bi-I in the solid pressure medium is larger or smaller than that under hydrostatic conditions. According to the classical nucleation theory, the stress provides an additional driving force, leading to the reduction of the free energy barrier in the formation of liquid nuclei and thus melting temperature. Finally and additionally, the melting ofmore » Bi-I may also be favored by heterogeneous nucleation of the liquid on the boundary between the solid medium and the Bi sample, further contributing to the reduction of the melting temperature.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Carnegie Inst. of Washington, Argonne, IL (United States). High Pressure Collaborative Access Team (HPCAT). Geophysical Lab.
Publication Date:
Research Org.:
Carnegie Inst. of Washington, Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
OSTI Identifier:
1466209
Alternate Identifier(s):
OSTI ID: 1361836
Grant/Contract Number:  
FG02-99ER45775; NA0001974; FG02-94ER14466; AC02-06CH11357; EAR 11-57758; EAR-1128799
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 16; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; solid media; nucleation; hydrostatics; X-ray diffraction; crystal structure; crystalline solids; shear deformation; melting

Citation Formats

Lin, Chuanlong, Smith, Jesse S., Sinogeikin, Stanislav V., and Shen, Guoyin. Effect of stress on melting of rhombohedral bismuth. United States: N. p., 2017. Web. doi:10.1063/1.4981810.
Lin, Chuanlong, Smith, Jesse S., Sinogeikin, Stanislav V., & Shen, Guoyin. Effect of stress on melting of rhombohedral bismuth. United States. doi:10.1063/1.4981810.
Lin, Chuanlong, Smith, Jesse S., Sinogeikin, Stanislav V., and Shen, Guoyin. Tue . "Effect of stress on melting of rhombohedral bismuth". United States. doi:10.1063/1.4981810. https://www.osti.gov/servlets/purl/1466209.
@article{osti_1466209,
title = {Effect of stress on melting of rhombohedral bismuth},
author = {Lin, Chuanlong and Smith, Jesse S. and Sinogeikin, Stanislav V. and Shen, Guoyin},
abstractNote = {In this paper, pressure-induced melting of rhombohedral bismuth (Bi-I) has been investigated in the solid pressure medium of NaCl and the hydrostatic medium of neon at high temperatures by in-situ synchrotron x-ray diffraction. Upon compression from ~ 0.7 GPa to 3.2 GPa at (or below) 489 K, Bi-I melts into a liquid between ~ 1.2 and 1.6 GPa in the solid pressure medium and then crystallizes into Bi-IV at ~ 2.9 GPa. However, at the same temperature of 489 K, Bi-I transforms to a crystalline phase (Bi-II' or Bi-II) at ~ 1.8 GPa under hydrostatic conditions, followed by a transformation to Bi-IV at 2.5 GPa. Our x-ray diffraction results indicate that the melting of Bi-I at (or below) 489 K is due to the stress. There is a stress effect on the structural deformation of Bi-I when the solid pressure medium is used, viz., pressure-dependent c/a for Bi-I in the solid pressure medium is larger or smaller than that under hydrostatic conditions. According to the classical nucleation theory, the stress provides an additional driving force, leading to the reduction of the free energy barrier in the formation of liquid nuclei and thus melting temperature. Finally and additionally, the melting of Bi-I may also be favored by heterogeneous nucleation of the liquid on the boundary between the solid medium and the Bi sample, further contributing to the reduction of the melting temperature.},
doi = {10.1063/1.4981810},
journal = {Applied Physics Letters},
number = 16,
volume = 110,
place = {United States},
year = {Tue Apr 18 00:00:00 EDT 2017},
month = {Tue Apr 18 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: