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Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Factors influencing deformation stability of binary glasses
P Murali1, U Ramamurty, Vijay B Shenoy
1Department of Materials Engineering, Indian Institute of Science, Bangalore, India. murali@materials.iisc.ernet.in
The Journal of Chemical Physics
|March 19, 2008
Summary
Deformation stability in binary glasses increases with larger atomic size ratios and stiffness. This resistance to crystallization is crucial for understanding glass behavior under stress.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Materials Science
Background:
- Crystallization is a key mechanism for strain accommodation in large deformation of glasses.
- Deformation stability quantifies a glass's resistance to crystallization under stress.
Purpose of the Study:
- Investigate the influence of atomic size ratio and stiffness on the deformation stability of binary glasses.
- Elucidate the relationship between atomic parameters and resistance to deformation-induced crystallization.
Main Methods:
- Utilized molecular static simulations to model binary glass systems.
- Analyzed misfit energies and packing fractions of glasses and crystalline solid solutions.
- Compared amorphous and crystalline states across varying atomic size ratios and stiffness parameters.
Main Results:
- Deformation stability increases with higher atomic size ratios and atomic stiffness.
- Glass misfit energy is insensitive to atomic size ratio, unlike crystalline solid solutions.
- A critical atomic size ratio exists beyond which the amorphous state is stable against crystallization.
Conclusions:
- Atomic size ratio and stiffness are critical factors governing glass deformation stability.
- The amorphous state's stability is enhanced by increasing atomic stiffness, which lowers the critical atomic size ratio.
- Findings provide insights into designing glasses with improved resistance to deformation-induced crystallization.
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