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Farklı Hızlarda Soğutulan Sıvı Cu Kümeli Yapısındaki Faz Dönüşümüne Basıncın Etkisi: Moleküler Dinamik Çalışması
2019
Journal:  
Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi
Author:  
Abstract:

Bu çalışmada, sıvı fazdaki Cu kümeli yapısının (cluster) 2x1013 K/s ve 2x1012 K/s soğutma hızları için farklı basınç değerleri altında yapısal değişimlerini belirlemek için moleküler dinamik benzetimi kullanıldı. NVT istatistiksel topluluğuna sahip moleküler dinamik hücresindeki atomlar arası etkileşmeleri hesaplamak için Kuantum Sutton-Chen (K-SC) potansiyel fonksiyonu kullanıldı. Sıvı fazdan soğutma işlemleri esnasında meydana gelen yapısal geçişler kohesif enerjideki (Ec) değişimler ve radyal dağılım fonksiyonu (RDF) kullanılarak belirlenmeye çalışıldı. Cu kümeli yapısının soğutma işlemleri esnasında sıvı-amorf fazdan, fcc (yüzey merkezli kübik yapı) birim hücreli kristal faza doğrudan geçiş yaptığı tespit edildi. Artan basınç değerlerinin faz geçiş süreleri üzerinde etkili olduğu görüldü.  

Keywords:

Pressure Effect on Phase Conversion in Cooled Liquid Cu Column Structure at Different Speed: Molecular Dynamic Study
2019
Author:  
Abstract:

In this study, molecular dynamic comparison was used to determine the structural changes under different pressure values for the 2x1013 K/s and 2x1012 K/s cooling speeds of the Cu group structure (cluster) in the liquid phase. The potential function of Quantum Sutton-Chen (K-SC) was used to calculate the interactions between atoms in the molecular dynamic cell with the statistical community of NVT. The structural transitions occurring during the fluid phase cooling processes were attempted to be determined using coherent energy (Ec) changes and the radial distribution function (RDF). During the cooling processes, the Cu group structure was found to pass directly from the fluid-amorphic phase, the fcc (surface-centric cubic structure) unit cell crystal phase. The increasing pressure values have been shown to have an effect on phase transition times.

Keywords:

The Effect Of Pressure On Phase Transformation In Liquid Cu Cluster At Different Cooling Rates: A Molecular Dynamics Study
2019
Author:  
Abstract:

In this study, structural changes in the liquid phase Cu cluster structure under different pressure values for 2x1013 K/s and 2x1012 K/s cooling rates were determined by molecular dynamic simulation method. Inter atomic interactions for the NVT statistical ensemble were calculated using the Quantum Sutton-Chen (K-SC) potential function. Structural transitions during the cooling process from liquid phase were determined by using changes in cohesive energy (EC) and radial distribution function (RDF). The Cu cluster structure was found to transformation directly from the liquid-amorphous phase to the fcc (surface-centered cubic structure) unit cell crystalline phase during the cooling processes. Increased pressure values were found to be effective on phase transformation times.

Keywords:

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Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

Journal Type :   Uluslararası

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Article : 2.053
Cite : 3.830
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Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi