Calculation of surface tension and surface phase transition line in binary Ga-Tl system

C. Mekler, G. Kaptay

Research output: Article

20 Citations (Scopus)

Abstract

The surface phase transition (SPT) line has been calculated at the Ga-rich side of the binary Ga-Tl system. The liquid alloys at a given temperature can be divided into the following four different regions as a function of Tl-content of the alloy: (i) at very low Tl-content one bulk Ga-rich alloy is obtained not covered by any nano-layer, (ii) at a somewhat higher Tl-content one bulk Ga-rich liquid phase is obtained, covered by a Tl-rich nano-layer, (iii) at medium Tl-content two bulk liquids are obtained, (iv) at high Tl-content one Tl-rich liquid is obtained with no nano-layer on it. An improved version of the Ga-Tl phase diagram is offered, showing the equilibrium SPT line and the region of the Ga-rich bulk liquid, covered by a Tl-rich nano-layer. The presence of the latter changes some physical properties of the system. Particularly, the temperature coefficient of the surface tension changes from a low negative value to a high positive value when increasing the Tl-composition of the alloy and the SPT line is crossed. The position of the SPT line is essential to control Marangoni convection in liquid monotectic alloys.

Original languageEnglish
Pages (from-to)65-69
Number of pages5
JournalMaterials Science and Engineering A
Volume495
Issue number1-2
DOIs
Publication statusPublished - nov. 15 2008

Fingerprint

Surface tension
interfacial tension
Phase transitions
Liquids
liquid alloys
monotectic alloys
liquids
Marangoni convection
liquid phases
physical properties
Phase diagrams
phase diagrams
Physical properties
temperature
coefficients
Temperature
Chemical analysis

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

@article{95778d32079442d2a8630b81b042aec0,
title = "Calculation of surface tension and surface phase transition line in binary Ga-Tl system",
abstract = "The surface phase transition (SPT) line has been calculated at the Ga-rich side of the binary Ga-Tl system. The liquid alloys at a given temperature can be divided into the following four different regions as a function of Tl-content of the alloy: (i) at very low Tl-content one bulk Ga-rich alloy is obtained not covered by any nano-layer, (ii) at a somewhat higher Tl-content one bulk Ga-rich liquid phase is obtained, covered by a Tl-rich nano-layer, (iii) at medium Tl-content two bulk liquids are obtained, (iv) at high Tl-content one Tl-rich liquid is obtained with no nano-layer on it. An improved version of the Ga-Tl phase diagram is offered, showing the equilibrium SPT line and the region of the Ga-rich bulk liquid, covered by a Tl-rich nano-layer. The presence of the latter changes some physical properties of the system. Particularly, the temperature coefficient of the surface tension changes from a low negative value to a high positive value when increasing the Tl-composition of the alloy and the SPT line is crossed. The position of the SPT line is essential to control Marangoni convection in liquid monotectic alloys.",
keywords = "Composition dependence, Gallium, Marangoni convection, Surface phase transition, Surface tension, Temperature dependence, Thallium",
author = "C. Mekler and G. Kaptay",
year = "2008",
month = "11",
day = "15",
doi = "10.1016/j.msea.2007.10.111",
language = "English",
volume = "495",
pages = "65--69",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",
number = "1-2",

}

TY - JOUR

T1 - Calculation of surface tension and surface phase transition line in binary Ga-Tl system

AU - Mekler, C.

AU - Kaptay, G.

PY - 2008/11/15

Y1 - 2008/11/15

N2 - The surface phase transition (SPT) line has been calculated at the Ga-rich side of the binary Ga-Tl system. The liquid alloys at a given temperature can be divided into the following four different regions as a function of Tl-content of the alloy: (i) at very low Tl-content one bulk Ga-rich alloy is obtained not covered by any nano-layer, (ii) at a somewhat higher Tl-content one bulk Ga-rich liquid phase is obtained, covered by a Tl-rich nano-layer, (iii) at medium Tl-content two bulk liquids are obtained, (iv) at high Tl-content one Tl-rich liquid is obtained with no nano-layer on it. An improved version of the Ga-Tl phase diagram is offered, showing the equilibrium SPT line and the region of the Ga-rich bulk liquid, covered by a Tl-rich nano-layer. The presence of the latter changes some physical properties of the system. Particularly, the temperature coefficient of the surface tension changes from a low negative value to a high positive value when increasing the Tl-composition of the alloy and the SPT line is crossed. The position of the SPT line is essential to control Marangoni convection in liquid monotectic alloys.

AB - The surface phase transition (SPT) line has been calculated at the Ga-rich side of the binary Ga-Tl system. The liquid alloys at a given temperature can be divided into the following four different regions as a function of Tl-content of the alloy: (i) at very low Tl-content one bulk Ga-rich alloy is obtained not covered by any nano-layer, (ii) at a somewhat higher Tl-content one bulk Ga-rich liquid phase is obtained, covered by a Tl-rich nano-layer, (iii) at medium Tl-content two bulk liquids are obtained, (iv) at high Tl-content one Tl-rich liquid is obtained with no nano-layer on it. An improved version of the Ga-Tl phase diagram is offered, showing the equilibrium SPT line and the region of the Ga-rich bulk liquid, covered by a Tl-rich nano-layer. The presence of the latter changes some physical properties of the system. Particularly, the temperature coefficient of the surface tension changes from a low negative value to a high positive value when increasing the Tl-composition of the alloy and the SPT line is crossed. The position of the SPT line is essential to control Marangoni convection in liquid monotectic alloys.

KW - Composition dependence

KW - Gallium

KW - Marangoni convection

KW - Surface phase transition

KW - Surface tension

KW - Temperature dependence

KW - Thallium

UR - http://www.scopus.com/inward/record.url?scp=50949126021&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50949126021&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2007.10.111

DO - 10.1016/j.msea.2007.10.111

M3 - Article

AN - SCOPUS:50949126021

VL - 495

SP - 65

EP - 69

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

IS - 1-2

ER -