Melting Point of Ti, Ti3Al, TiAl, and TiAl3 Nanoparticles Versus Their Diameter in Vacuum and Liquid Aluminum: Molecular Dynamics Investigation

The dependence of the melting point of Ti, Ti 3 Al, TiAl, and TiAl 3 nanoparticles on temperature in vacuum and an aluminum matrix has been studied using the molecular dynamics method. It has been found that the melting point of all nanoparticles drops with a decrease in their diameter, the decrease...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2022-02, Vol.134 (2), p.183-187
Main Authors: Poletaev, G. M., Sitnikov, A. A., Yakovlev, V. I., Filimonov, V. Yu
Format: Article
Language:English
Subjects:
Aluminum
Classical and Quantum Gravitation
Elementary Particles
Interdiffusion
Intermetallic compounds
Melting points
Molecular dynamics
Nanoparticles
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theory
Relativity Theory
Sheaths
Solid State Physics
Solids and Liquids
Titanium aluminides
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Summary:The dependence of the melting point of Ti, Ti 3 Al, TiAl, and TiAl 3 nanoparticles on temperature in vacuum and an aluminum matrix has been studied using the molecular dynamics method. It has been found that the melting point of all nanoparticles drops with a decrease in their diameter, the decrease being proportional to the surface area/volume ratio. The melting points of Ti, Ti 3 Al, and TiAl nanoparticles in the aluminum matrix turn out to be lower than those of the same particles in vacuum. This is explained by interface smearing and disordering because of interdiffusion. For TiAl 3 nanoparticles, the result is radically different: the aluminum sheath influences the melting point of the nanoparticle insignificantly in this case. As the diameter of the particles grows both in vacuum and in aluminum, their melting points tend to the same value. This is because when particles became coarser, interdiffusion smears the surface and it becomes to play a minor role.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776122010095