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Title: Anisotropy of the solid–liquid interface properties of the Ni–Zr B33 phase from molecular dynamics simulation

Abstract

Solid–liquid interface (SLI) properties of the Ni–Zr B33 phase were determined from molecular dynamics simulations. In order to perform these measurements, a new semi-empirical potential for Ni–Zr alloy was developed that well reproduces the material properties required to model SLIs in the Ni 50.0Zr 50.0 alloy. In particular, the developed potential is shown to provide that the solid phase emerging from the liquid Ni 50.0Zr 50.0alloy is B33 (apart from a small fraction of point defects), in agreement with the experimental phase diagram. The SLI properties obtained using the developed potential exhibit an extraordinary degree of anisotropy. It is observed that anisotropies in both the interfacial free energy and mobility are an order of magnitude larger than those measured to date in any other metallic compound. Moreover, the [0 1 0] interface is shown to play a significant role in the observed anisotropy. Our data suggest that the [0 1 0] interface simultaneously corresponds to the lowest mobility, the lowest free energy and the highest stiffness of all inclinations in B33 Ni–Zr. This finding can be understood by taking into account a rather complicated crystal structure in this crystallographic direction.

Authors:
 [1];  [1]
  1. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1239832
Report Number(s):
IS-J 8908
Journal ID: ISSN 1478-6435
Grant/Contract Number:
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Philosophical Magazine (2003, Print)
Additional Journal Information:
Journal Name: Philosophical Magazine (2003, Print); Journal Volume: 95; Journal Issue: 2; Journal ID: ISSN 1478-6435
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; solid-liquid interface; semi-empirical potentials; molecular dynamics simulation

Citation Formats

Wilson, S. R., and Mendelev, M. I. Anisotropy of the solid–liquid interface properties of the Ni–Zr B33 phase from molecular dynamics simulation. United States: N. p., 2015. Web. doi:10.1080/14786435.2014.995742.
Wilson, S. R., & Mendelev, M. I. Anisotropy of the solid–liquid interface properties of the Ni–Zr B33 phase from molecular dynamics simulation. United States. doi:10.1080/14786435.2014.995742.
Wilson, S. R., and Mendelev, M. I. Thu . "Anisotropy of the solid–liquid interface properties of the Ni–Zr B33 phase from molecular dynamics simulation". United States. doi:10.1080/14786435.2014.995742. https://www.osti.gov/servlets/purl/1239832.
@article{osti_1239832,
title = {Anisotropy of the solid–liquid interface properties of the Ni–Zr B33 phase from molecular dynamics simulation},
author = {Wilson, S. R. and Mendelev, M. I.},
abstractNote = {Solid–liquid interface (SLI) properties of the Ni–Zr B33 phase were determined from molecular dynamics simulations. In order to perform these measurements, a new semi-empirical potential for Ni–Zr alloy was developed that well reproduces the material properties required to model SLIs in the Ni50.0Zr50.0 alloy. In particular, the developed potential is shown to provide that the solid phase emerging from the liquid Ni50.0Zr50.0alloy is B33 (apart from a small fraction of point defects), in agreement with the experimental phase diagram. The SLI properties obtained using the developed potential exhibit an extraordinary degree of anisotropy. It is observed that anisotropies in both the interfacial free energy and mobility are an order of magnitude larger than those measured to date in any other metallic compound. Moreover, the [0 1 0] interface is shown to play a significant role in the observed anisotropy. Our data suggest that the [0 1 0] interface simultaneously corresponds to the lowest mobility, the lowest free energy and the highest stiffness of all inclinations in B33 Ni–Zr. This finding can be understood by taking into account a rather complicated crystal structure in this crystallographic direction.},
doi = {10.1080/14786435.2014.995742},
journal = {Philosophical Magazine (2003, Print)},
number = 2,
volume = 95,
place = {United States},
year = {Thu Jan 08 00:00:00 EST 2015},
month = {Thu Jan 08 00:00:00 EST 2015}
}

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Cited by: 17 works
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