The β-relaxation in metallic glasses
WebThe characteristic relaxation time and activation energy of the heterogeneity evolution are in accord with those of excess enthalpy release by β-relaxation. Our study correlates β-relaxation with nanoscale spatial heterogeneity and provides direct evidence on the structural origins of β-relaxation in metallic glasses. WebHe was graduated from Hacettepe University, Department of Physics Engineering in 2003. Then, he completed his M.Sc. studies about electron and magnetotransport properties of AlGaAs/GaAs and InGaAs/GaAs heterostructures at Gazi University, Advanced Technologies Department in 2005. He went to the University of Essex (UK) as a visiting research student …
The β-relaxation in metallic glasses
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Web3 Feb 2024 · Sustainability considerations and energy security have led to an enormous research effort to develop better thermoelectric materials. 5–9 This has been driven by new design concepts such as the phonon-glass electron-crystal, nanostructuring, electronic bandstructure engineering and by improved experimental characterisation of electrical … WebHere we shed light on this question by accessing quantum oscillations in the high magnetic field-induced metallic regime above ≈47 T in YbB12, which we compare with the unconventional insulating regime. ... This absence indicates that the lack of grain boundaries and spin-glass-like behavior, not observed in our samples, might be key ...
Web3 Aug 2016 · The I(q) curves at low temperatures, ranging from 298 K to 699 K, show the glassy nature of the specimens. When the temperature is higher than 699 K, the metallic glass gradually devitrifies from the fully glassy structure, and the intensity of the first maximum in the I(q) curve becomes sharper. Web22 Apr 2024 · The β relaxation is an intrinsic and fundamental characteristic in metallic glasses (MGs), which is important to understand many crucial issues in material sciences …
WebYang, Yi-Bo, et al. "Unraveling strongly entropic effect on β-relaxation in metallic glass: Insights from enhanced atomistic samplings over experimentally relevant timescales." Physical Review B ...
Web26 Sep 2013 · The spectra show that in MGs there are two relaxations: (i) the α relaxation, linked to the glass transition, as observed in other classes of amorphous materials; and (ii) the β relaxation, well observed below the glass transition, with an intensity strongly dependent on the MG composition, the nature of which has been linked to the local …
Web1 May 2013 · In multicomponent metallic glasses, it is demonstrated that diffusion and secondary (β) relaxation are closely related, and cooperative stringlike atomic motion … board tax paymentWeb1 Mar 2024 · Since the metallic glasses are of viscoelastic nature, there is phase difference between the stress and strain. In this context, the resulting time-dependent stress is … clifford pharmacy clifford paWebSurprising rejuvenation of metallic glasses can be achieved through training in the β relaxation process at a relatively small cyclic strain – with a magnitude of 0.2%. • … board tax policyWebABSTRACT: Understanding how glasses form, the so-called vitrification, remains a major challenge in materials science. Here, we study … clifford phonics downloadWebKeywords: metallic glass,internal friction,relaxation,dynamic analysis. 1. Introduction ... Cui et al.[28]studied the effects of crystallization friction on the β relaxation and showed that La-based alloys have a reversible relaxation behavior which is related to the local atomic cooperative motions. Wang et al.[29]studied the correlation ... clifford phillips and florida mug shotsWebWe reveal a slow-to-fast dynamics transition in the as-cast Cu 46 Zr 46 Al 8 (at.%) metallic glass (MG) at a temperature below the glass transition upon heating, which depends on the competition between free volume annihilation and thermally-activated atomic mobility, well consistent with the bond-length change of Cu-Cu pairs. The activation of α-relaxation at … clifford phonics fun 語数Web3 Jan 2024 · In this paper, the role of primary stored energy and structural heterogeneity on the subsequent effects of hydrogen microalloying in glassy alloys was studied. For this purpose, two bulk metallic glasses with different chemical compositions and initial stored energy, i.e. Zr60Co30Al10 and Zr55Co30Al10Nb5, were fabricated in a hydrogen-induced … clifford physical therapy