Journal ArticleDOI
Thermal expansion and density of glassy PdNiP and PtNiP alloys
TLDR
In this paper, the authors measured the thermal expansion and density of (Pd1−xNix)0.80P0.20 and (Pt1−yNiy) 0.75P 0.25 alloys in their various states from room temperature to the glass transition temperature Tg.Abstract:
Thermal expansion and density of (Pd1−xNix)0.80P0.20 and (Pt1−yNiy)0.75P0.25 alloys in their various states have been measured from room temperature to the glass transition temperature Tg. The thermal expansion of the glassy alloys at room temperature varies linearly with x and y and is 10 to 20% higher than that of corresponding pure metals. The thermal expansion of the undercooled alloy liquids near Tg as well as the molar volume v deduced from the density of glasses in contrast exhibits a negative deviation with composition x and y. This behavior is in line with the previously reported negative deviation of the glass transition temperature of these glassy alloys with metal content and may be explained in terms of excess volume associated with a mixture of hard spheres.read more
Citations
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Journal ArticleDOI
Excess free volume in metallic glasses measured by X-ray diffraction
Alain Reza Yavari,Alain Le Moulec,Akihisa Inoue,Nobuyuki Nishiyama,Nicoleta Lupu,Nicoleta Lupu,Eiichiro Matsubara,Walter José Botta,Gavin Vaughan,Marco Di Michiel,Åke Kvick +10 more
TL;DR: In this paper, the contribution of free volume in glassy materials and metallic glasses was measured by X-ray diffraction in transmission during heating using synchrotron light, and the measured thermal expansion coefficients αth were the same as in dilatometry.
Book ChapterDOI
Structure of Metallic Alloy Glasses
TL;DR: In this paper, the current status of research on structure of metallic glasses is reviewed in this chapter, which is largely limited to metallic glasses which can be retained at room temperature, but their metastability depends critically on impurity content.
Journal ArticleDOI
The dynamic structure model for ion transport in glasses
TL;DR: In this article, a model for ion transport in glass which involves the creation of fluctuating pathways within a dynamically determined structure was developed. But this model is not suitable for the analysis of glass electrolytes, and it is suggested that this model could form the basis for a comprehensive theory of vitreous electrolytes.
Journal ArticleDOI
The influence of structural relaxation on the density and Young’s modulus of metallic glasses
TL;DR: The Young's modulus E of metallic glasses increases by ∼7% while the density ρ increases by only ∼0.5% upon annealing near the glass transition temperature as discussed by the authors.
References
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Journal ArticleDOI
Equilibrium Thermodynamic Properties of the Mixture of Hard Spheres
TL;DR: In this article, an equation of state is proposed for the mixture of hard spheres based on an averaging process over the two results of the solution of the Percus-Yevick integral equation.
Journal ArticleDOI
Soft Transverse Phonons in a Metallic Glass
TL;DR: The acoustic properties and low-temperature specific heat of a dense metallic glass in bulk form have been studied for the first time in this article, where a large softening of long-wavelength transverse acoustic phonons in the glass, relative to the crystal, is observed which is not simply attributable to the small density difference between the two states.
Journal ArticleDOI
Role of chemical bonding in metallic glasses
TL;DR: In this article, the effects of Cu and Si on the densities and stabilities of glassy Pcl-Cu-Si alloys have been studied in terms of chemical bonding.
Journal ArticleDOI
Studies in Molecular Dynamics. III. A Mixture of Hard Spheres
TL;DR: For an equimolar mixture of hard spheres differing in radius by a factor of 3, it was shown that the numerical method gives the thermodynamic properties within 1% accuracy in the fluid region but generates metastable states at solid densities.