Determination of Molecular Surface Structure, Composition, and Dynamics under Reaction Conditions at High Pressures and at the Solid-Liquid Interface

2011 ◽  
Vol 50 (43) ◽  
pp. 10116-10129 ◽  
Author(s):  
Gabor A. Somorjai ◽  
Simon K. Beaumont ◽  
Selim Alayoglu
Keyword(s):  
Surface Structure ◽  
High Pressures ◽  
Liquid Interface ◽  
Molecular Surface ◽  
Reaction Conditions ◽  
Solid Liquid Interface ◽  
Solid Liquid

Determination of the Solid-Liquid Interface Energy in the Al-Cu-Ag System

2007 ◽  
Vol 38 (9) ◽  
pp. 1956-1964 ◽  
Author(s):  
A. Bulla ◽  
C. Carreno-Bodensiek ◽  
B. Pustal ◽  
R. Berger ◽  
A. Bührig-Polaczek ◽  
...  
Keyword(s):  
Interface Energy ◽  
Liquid Interface ◽  
Solid Liquid Interface ◽  
Solid Liquid

Determination of the Position of Solid/Liquid Interface During Solidification and Melting of Metals With Vibrational Parameters

1993 ◽  
Author(s):  
Wang Fengquan ◽  
Zhu Zhenghua ◽  
Chen Shiyu
Keyword(s):  
Mechanical Model ◽  
Liquid Interface ◽  
Shear Stresses ◽  
Dynamical Equations ◽  
Solid Phases ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
First Time ◽  
Liquid And Solid Phases

Abstract The paper proposes the method to locate the solid / liquid interface with vibrational parameters during solidification for the first time. The sufficient difference in resistance to shear stresses between liquid and solid phases of metals and alloys permits the application of vibrational parameters to locate the interface in real time and in situation during solidification. Based on the solidification theory, continuum mechanics, vibrational modal analysis and sensitivity analysis, the author established the mechanical model and the dynamical equations of typical Bridgman solidifying system, derived the sensitivity of eigenvalues of the Bridgman system to the location of the solid / liquid interface as well as the calculating formulae concerned. The experimental results are quite accordant with those of computed ones.

scholarly journals Modeling of Surface Structure Formation after Laser Irradiation

2011 ◽  
Vol 222 ◽  
pp. 90-93
Author(s):  
Jevgenijs Kaupuzs ◽  
Sharif E. Guseynov ◽  
Janis S. Rimshans ◽  
Artur Medvid'
Keyword(s):  
Surface Structure ◽  
Laser Irradiation ◽  
Stefan Problem ◽  
Nonlinear Differential Equations ◽  
Surface Profile ◽  
Liquid Interface ◽  
Solidification Processes ◽  
Two Phases ◽  
Solid Liquid Interface ◽  
Solid Liquid

The Stefan problem in a semi-infinite media under laser irradiation is considered. It is related to the melting and solidification processes, resulting in certain surface structure after the solidification. A simple model, as well as a more sophisticated one is proposed to describe this process. The latter model allows us to calculate the surface profile by solving a system of two nonlinear differential equations, if the shape of the solid-liquid interface is known. It has to be found as a solution of two-phases Stefan problem. The results of example calculations by the fourth-order Runge-Kutta method are presented, assuming that the solid-liquid interface has a parabolic shape. The calculated crossection of the surface structure shows a characteristic cone in the center, in agreement with experimental observations.

Sign in / Sign up

Export Citation Format

Share Document