The Effect of Pressure to the Crystalization and Glass Transition Temperature of Liquid PdSi Alloy Modeled with Quantum Sutton-Chen Potential

Year 2019, Volume: 8 Issue: 4, 1233 - 1242, 24.12.2019

Canan Aksu Canbay Sefa Kazanc

Abstract

In this work, the effect of pressure on the
crystallization (T_c) and glass transition (T_g)
temperatures of a modelled PdSi liquid alloy was investigated for different
cooling rates by using Quantum Sutton Chen(K-SC) potential which is used to
determine the interactions between atoms. It was determined that at the cooling
rates of 2,5x10¹¹ K/s and 2,5x10¹² K/s the alloy system
in liquid phase transformed into crystal and amorphous phase, respectively. The
glass transition temperature was defined by the Wendt-Abraham parameter and
radial distribution function (RDF) peaks. It was concluded that the increment
of pressure led to an increase in the crystallization and glass transition
temperatures and the ratio of T_g/T_m resulted in an
improvement of the glass forming ability.

Keywords

Quantum Sutton Chen, Glass transition temperature, Crystallization temperature, PdSi alloy

The Effect of Pressure to the Crystallization and Glass Transition Temperature of Liquid PdSi Alloy Modelled with Quantum Sutton-Chen Potential

Abstract

Bu
çalışmada atomlar arasındaki etkileşmelerin belirlenmesinde Kuantum Sutton Chen
(K-SC) potansiyel fonksiyonu kullanılarak farklı soğutma hızları için model
PdSi sıvı alaşımının kristallenme (Tc) ve camsı geçiş sıcaklıklarına (Tg)
basıncınetkisi incelendi. 2,5x1011 K/s ve 2,5x1012K/s soğutma hızlarında sıvı
fazdaki alaşım sisteminin sırasıyla kristal ve amorf faza dönüştüğü tespit
edildi. Camsı geçiş sıcaklığı Wendt-Abraham parametresi ve radyal dağılım
fonksiyonu (RDF) piklerinden belirlendi. Basınç artışınınkristallenme, camsı
geçiş sıcaklığıve Tg/Tm oranınıyükselterek camsı oluşum kabiliyetini arttırdığı
tespit edildi. 

Keywords

Kuantum Sutton Chen, Cam geçiş sıcaklığı, Kristalleşme sıcaklığı, PdSi alaşımı

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