Özet:

In this study, using different atoms-inter-potencies and classical molecular dynamic (MD) comparisons, the basic state of the platinum (Pt) element with a surface-centric cubic (fcc) structure began and the physical characteristics of a temperature range directly above the erosion point and the devilation of the atomic structure were detailed. To analyze the structural development of the solid system depending on increased temperature and to determine the erosion point, analytical methods such as the pair distribution function (PDF), energy-temperature (E-T), curve parameter-temperature (a-T), linear thermal prolongation ratio-temperature (CLTE-T) curves and double analysis method were used. The data obtained from the analysis of the results of the MD comparison for all potentialities has been compared and discussed with previously experimental or theoretical data. The results obtained with different atoms-inter-potencies are mostly consistent with each other, but there are also points where they differ. Specifically, when it comes to the determination of the system’s welding point, it has been observed that each potential produces different welding temperatures. As a common in all potential energy functions, the number of 1421 bonded pairs that represent the fcc structure with increased temperature has decreased, and it has been shown that a large portion of these pairs are converted to 1541 and 1431 bonded pairs that represent the defective icosahedra (deficos) and defective fcc structure. Some of the potential discussed here for the Pt element are low, while some are successful in describing the physical characteristics in the high temperature range, while the embedded atomic method potential (EAM1) and the tight-linked (TB) potential, proposed by Sheng and his friends, have been more successful in describing all the characteristics of the pure Pt element addressed in the wide temperature scale than others.

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