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We performed calorimetric measurements on 30 bulk metallic glasses differing with their mixing entropies DSmix. On this basis, the excess entropies DS and excess enthalpies DH of glasses with respect to their maternal crystalline states are…

无序系统与神经网络 · 物理学 2024-04-01 G. V. Afonin , J. C. Qiao , A. S. Makarov , R. A. Konchakov , E. V. Goncharova , N. P. Kobelev , V. A. Khonik

We performed calorimetric and torsion stress relaxation measurements upon linear heating of six conventional and high-entropy metallic glasses with the mixing entropy {\Delta}Smix ranging from 0.86R to 1.79R (R is the universal gas…

无序系统与神经网络 · 物理学 2025-05-26 G. V. Afonin , S. L. Scherbakov , R. A. Konchakov , N. P. Kobelev , J. B. Cui , J. C. Qiao , V. A. Khonik

We measured the shear viscosity of 14 metallic glasses differing with their mixing entropy $\Delta S_{mix}$. It is found that the viscosity at the glass transition temperature $T_g$ significantly increases with $\Delta S_{mix}$. Using…

无序系统与神经网络 · 物理学 2023-11-21 A. S. Makarov , J. B. Cui , J. C. Qiao , G. V. Afonin , N. P. Kobelev , V. A. Khonik

The metastable states of a glass are counted by adding a weak pinning field which explicitly breaks the ergodicity. Their entropy, that is the logarithm of their number, is extensive in a range of temperatures $T_G < T < T_C$ only, where…

凝聚态物理 · 物理学 2009-10-28 R. Monasson

We performed high-frequency shear modulus and calorimetry measurements on seven high-entropy metallic glasses (HEMGs) in the initial, relaxed and crystalline states. It is shown that the shear modulus of HEMGs is intrinsically related with…

无序系统与神经网络 · 物理学 2025-03-07 Andrey Makarov , Evgenia Gonchrova , Jichao Qiao , Roman Konchakov , Vitaly Khonik

We performed calorimetric studies of 26 metallic glasses and calculated the excess entropy and excess enthalpy with respect to their counterpart crystals. On this basis, we introduced a dimensionless entropy-based parameter {\sigma}scl,…

无序系统与神经网络 · 物理学 2025-05-26 J. B. Cui , R. A. Konchakov , G. V. Afonin , A. S. Makarov , G. J. Lyu , J. C. Qiao , N. P. Kobelev , V. A. Khonik

The free energy of mixing and the entropy of mixing for Cu$_{x}$Al$_{1-x}$ liquid binary alloys have been systematically investigated by using the electronic theory of metals along with the perturbation approach at a thermodynamic state…

材料科学 · 物理学 2016-07-21 Fysol Ibna Abbas , G. M. Bhuiyan , A. Z. Ziauddin Ahmed

Recent studies (J. Alloys Compd. 695 (2017) 2661) of the electronic structure and properties of $(TiZrNbCu)_{1-x}$$Ni_{x}$ (x$\leq$0.25) amorphous high entropy alloys (a-HEA) have been extended to x=0.5 in order to compare behaviours of…

High entropy materials offer a promising avenue for thermoelectric materials discovery, design, and optimization. However, the large chemical spaces that need to be explored hamper their development. In this work, a large family of…

Chemical structure has been long recognized to greatly influence polymer glass formation, but a general molecular theory that predicts how chemical structure determines the properties of glass-forming polymers has been slow to develop.…

软凝聚态物质 · 物理学 2017-11-01 Wen-Sheng Xu , Karl F. Freed

The internal states or local structures of bulk metallic glass (BMGs) can be well reflected from the changes of density, structural relaxation as well as the elastic constants. With the increasing free volume (FV) content, more local atomic…

材料科学 · 物理学 2013-10-11 J. Tan , C. J. Li , Y. H. Jiang , R. Zhou , J. Eckert

We use the general statement of the second law applied to an isolated system, the glass in an extremely large medium, to prove that the entropy of the glass must decrease with time during its relaxation towards the supercooled liquid state.…

无序系统与神经网络 · 物理学 2009-09-04 P. D. Gujrati

The high cooling rate needed for preparing the metallic glass (MG) makes the nonequilibrium nature of glass formation more prominent and requires a better quenching technique than ever before. Here, we formulate the cooling process in an…

材料科学 · 物理学 2023-09-19 Jian Guo Wang

As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek further understanding of property changes across the phase boundary between \enquote{high-entropy} and \enquote{entropy-stabilized}. The…

We show that thermodynamic scaling can be derived by combining the Murnaghan equation of state (EOS) with the generalized entropy theory (GET) of glass formation. In our theory, thermodynamic scaling arises in the non-Arrhenius relaxation…

软凝聚态物质 · 物理学 2021-03-18 Jack F. Douglas , Wen-Sheng Xu

We develop a generic strategy and simple numerical models for multi-component metallic glasses for which the swap Monte Carlo algorithm can produce highly stable equilibrium configurations equivalent to experimental systems cooled more than…

统计力学 · 物理学 2020-10-09 Anshul D. S. Parmar , Misaki Ozawa , Ludovic Berthier

We investigate scenarios in which the low-temperature phase of short-range spin glasses comprises thermodynamic states which are nontrivial mixtures of multiple incongruent pure state pairs. We construct a new kind of metastate supported on…

无序系统与神经网络 · 物理学 2024-03-05 C. M. Newman , D. L. Stein

The specific heat of liquid helium confined under pressure in nanoporous material and the formation, in these conditions, of a glass phase accompanied by latent heat are known. These properties are in good agreement with a recent model…

无序系统与神经网络 · 物理学 2016-08-03 Robert F. Tournier , Jacques Bossy

We connect the configurational entropy of a liquid to the geometrical properties of its local energy landscape, using a high-temperature expansion. It is proposed that correlations between local structures arises from their overlap and,…

软凝聚态物质 · 物理学 2016-08-24 Pierre Ronceray , Peter Harrowell

Glasses derive their functional properties from complex relaxation dynamics that remain enigmatic under extreme conditions. While the temperature dependence of these relaxation processes is well-established, their behavior under…

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