Effects of cooling rate on the atomic structure and glass formation process of Co90 Zr10 metallic glass investigated by molecular dynamics simulations

Murat ÇELTEK; Sedat ŞENGÜL

Makale detayları

Effects of cooling rate on the atomic structure and glass formation process of Co90 Zr10 metallic glass investigated by molecular dynamics simulations

Yazarlar:

Murat ÇELTEK | Sedat ŞENGÜL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2019 Vol.43 Issue 1, pp.11-25

Belge Tipi:

Makale

Yayın Tarihi:

1/2019

Belge Dili:

Türkçe

Document ID (Org No.):

2000759080

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Özet:

 

In this study, the atomic structure and the glass formation process of Co90 Zr10 metallic glass alloy were  studied by molecular dynamic simulation based on the embedded atom method using four different cooling rates. The  average atomic volume and the potential energy of the system were observed to be strongly dependent on the cooling  rate during rapid solidification, and the glass transition temperature decreased with decreasing cooling rate. The radial  distribution functions and the structure factors derived from molecular dynamics simulations at 300 K agreed well with  the experimental and other molecular dynamics results. The coordination numbers calculated at 300 K were consistent  with the experimental results in the literature. The local structural atomic orders of the system have been characterized  by Honeycutt-Andersen indices and the Voronoi tessellation method. We realized that the FCC and icosahedral shortrange  order increases with decreasing cooling rate, the icosahedral clusters are predominant in the Co90 Zr10 metallic  glass, and the fraction of the icosahedral polyhedra increases with decreasing cooling rate and temperature. We have  seen that Co-centered Voronoi polyhedrals such as  ,  , and  play a dominant role in the  development of the icosahedral order of the Co90 Zr10 alloy.

Makale detayları

Effects of cooling rate on the atomic structure and glass formation process of Co90 Zr10 metallic glass investigated by molecular dynamics simulations

Yazarlar: Murat ÇELTEK | Sedat ŞENGÜL

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2019 Vol.43 Issue 1, pp.11-25

Belge Tipi: Makale

Yayın Tarihi: 1/2019

Belge Dili: Türkçe

Document ID (Org No.): 2000759080

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Sayı

Yazarlar:

Murat ÇELTEK | Sedat ŞENGÜL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2019 Vol.43 Issue 1, pp.11-25

Belge Tipi:

Makale

Yayın Tarihi:

1/2019

Belge Dili:

Türkçe

Document ID (Org No.):

2000759080

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101