Article
Biochemistry & Molecular Biology
Ion Ivan, Alina M. Ionescu, Daniel N. Crisan, Adrian Crisan
Summary: Understanding the vortex matter and dynamics is crucial for practical applications of superconductors. We have investigated the vortex glass-vortex liquid phase transitions in CaKFe4As4 and BaFe2(As0.68P0.32)(2) single crystals using multi-harmonic susceptibility studies. Our findings suggest that the phase transition can be treated as a melting process according to Lindemann's approach, even in iron-based superconductors. The experimental data are consistent with a temperature-dependent London penetration depth given by a 3D XY fluctuations model.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Thermodynamics
M. B. Tang, X. C. Liu, M. H. Zhang, X. H. Pan
Summary: Heat capacity is an important subject in condensed matter physics. Previous studies have shown that the change in heat dQ depends on the macroscopic physical variables dT and dlnV in general solids. In this paper, we analyze the thermal parameters during the melting process in a series of reference materials and explain the behavior of heat of fusion and volume change using a new heat capacity model. The results provide insights into the volume-dependent heat capacity model and the melting process in general materials.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Physics, Applied
K. Sunil, D. Ashwini, Vijay S. Sharma
Summary: In this study, the pressure dependence of melting temperatures for 10 metals was investigated using the Lindemann law and Gruneisen parameter method. The analytical model used was simpler than DFT calculations and molecular dynamics, and the results were compared with experimental data and other models.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2021)
Article
Chemistry, Analytical
Vadym Borysiuk, Iakov A. Lyashenko, Valentin L. Popov
Summary: Thermal stability of triple layered Au@Pt@Au core-shell nanoparticles for H2O2 bi-directional sensing was investigated through computational study. The raspberry-like shape of the nanoparticles and their structural parameters were studied using classical molecular dynamics simulations. The results showed that the core-shell structure of the nanoparticles was maintained up to approximately 900 K, but was destroyed at higher temperatures.
Article
Crystallography
Marius Wolpmann, Lars Robben, Thorsten M. Gesing
Summary: Twelve cubic sodalites were studied using high-temperature X-ray diffraction experiments and TGA-DSC measurements. The temperature-dependent structure data and volume expansion were used to determine the Debye and Einstein temperatures, and the compounds were classified based on Lindemann constants.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-CRYSTALLINE MATERIALS
(2022)
Article
Multidisciplinary Sciences
Michal Delkowski, Christopher T. G. Smith, Jose V. Anguita, S. Ravi P. Silva
Summary: Future space travel requires lightweight and robust structural materials that can withstand extreme conditions and multiple entries into orbit. Current inorganic materials cannot meet these requirements. Carbon fiber reinforced polymers (CFRPs), although highly stable, have limitations due to environmental instabilities and electrostatic discharge. To improve space travel and structural engineering, a more robust and improved CFRP is needed. In this study, a superlattice nano-barrier-enhanced CFRP with a density of approximately 3.18 g/cm³ is presented. The composite exhibits enhanced radiation resistance and electrical conductivity, while maintaining ultra-dimensional stability even after temperature cycles.
Article
Mathematics
Jiaming Chen
Summary: This paper demonstrates that for a polarized variation of integral Hodge structure on a smooth complex quasi-projective variety, the union of non-factor special subvarieties of Shimura type with dominant period maps is a finite union of special subvarieties of the variety. This generalizes previous results and positively answers a conjecture on the geometric part of variations of Hodge structures.
JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK
(2021)
Article
Materials Science, Multidisciplinary
Yasar Orbay, Ziyuan Rao, Asli Cakir, Tolga Tavsanoglu, Michael Farle, Mehmet Acet
Summary: In this research, the FCC-BCC phase transition in (MnFeCoNi)80Cu20- Al, Ga high entropy alloys was investigated, and the structural, magnetic, hardness, and thermal expansion properties were studied. It was found that the addition of Al (10 at%) and Ga (15 at%) resulted in the emergence of BCC structure and ferromagnetic interactions. The investigated high entropy alloys obey the Slater-Pauling rule in terms of valence electron concentration and average magnetic moment values, and exhibit similar properties to Heusler alloys.
Article
Mathematics
Ziyang Gao, Bruno Klingler
Summary: In this paper, we prove the Ax-Schanuel conjecture for all admissible variations of mixed Hodge structures.
MATHEMATISCHE ANNALEN
(2023)
Article
Physics, Applied
Howuk Kim, Kyunghoon Kim, Nicholas Garcia, Tiegang Fang, Xiaoning Jiang
Summary: The LM LUS transducer with high thermal expansion is capable of effectively producing ultrasound waves, resulting in higher LUS intensity compared to conventional polymer-based transducers. Experimental results confirmed the LM transducer effectively intensifies ultrasound wave signals with a signal-to-noise gain over 30dB.
APPLIED PHYSICS LETTERS
(2021)
Article
Geography, Physical
Jingxin Jiang, Xiumian Hu, Juan Li, Eduardo Garzanti, Shijun Jiang, Ying Cui, Yasu Wang
Summary: The present study aims to discuss the amplitude and mechanisms of sea-level changes during the Paleocene-Eocene Thermal Maximum (PETM) in the Tarim epicontinental seaway. The study reveals that the sea-level rise during the PETM was largely caused by global warming, leading to extensive melting of high-mountain glaciers and thermal expansion of sea water.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Chemistry, Physical
Nguyen Van Nghia, Ho Khac Hieu
Summary: This study investigates the effects of pressure on the melting lines of tin, uranium, cadmium, thallium, and indium metals. The results are in agreement with previous experiments and can be used to analyze and verify future high-pressure experiments.
Article
Materials Science, Ceramics
Xiangkai Hao, Mengyue Wang, Xiansheng Liu, Yu Cai, Yumeng Xiang, Jianjun Tian, Feng Zhang, Weifeng Zhang, Erjun Liang, Maozhi Li, Yu Jia
Summary: This study investigates the effect of ZrMg and W on the configurational entropy of oxide ceramics, leading to a reduction in thermal expansion and phase transition temperatures. The change in thermal expansion is related to enhanced lattice configuration and increased entropy.
CERAMICS INTERNATIONAL
(2023)
Article
Mechanics
Yi Zhang, Yang Pan, Dong Han, Wei Zhong Jiang, Wei Jiang, Xue Gang Zhang, Xing Chi Teng, Xi Hai Ni, Xin Ren
Summary: A novel metamaterial with enhanced programmable CTE range is proposed in this study by combining bending-dominated and stretching-dominated unit cells. The design process includes replacing the sides of the triangle unit cell with bi-material anti-chiral unit cells to achieve thermal deformation. The results demonstrate significant improvements in the CTE range, design smoothness, continuity, and flexibility of the metamaterial.
COMPOSITE STRUCTURES
(2023)
Article
Thermodynamics
Chengzong Zeng, Jun Shen, Chaofan Ma
Summary: Low melting point metal (LMPM) based composites containing particles with high thermal conductivity have potential applications in thermal management. In this study, lead free eutectic field's metal Bi32.5In51Sn16.5 was used as the LMPM, and diamond microparticles were added as thermal conductive reinforcement. The addition of diamond particles increased the thermal conductivity of the LMPM by 85%. The thermal performance of LMPM-based heat sink filled with LMPM/diamond composites showed improved temperature control during long-time heating and faster cooling after power-off. The addition of diamond particles also affected the melting/solidification process of LMPM, prolonging the melting duration, reducing the subcooling effect, and shortening the initial solidification time.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Physics, Multidisciplinary
Qi Hao, Ji-Chao Qiao, E. Goncharova, G. Afonin, Min-Na Liu, Yi-Ting Cheng, V. A. Khonik
Article
Materials Science, Multidisciplinary
Andrei Makarov, Gennadii Afonin, Yurii Mitrofanov, Nikolai Kobelev, Vitaly Khonik
Article
Physics, Multidisciplinary
A. S. Makarov, E. V. Goncharova, G. V. Afonin, J. C. Qiao, N. P. Kobelev, V. A. Khonik
Article
Chemistry, Physical
A. S. Makarov, Yu. P. Mitrofanov, E. V. Goncharova, J. C. Qiao, N. P. Kobelev, A. M. Glezer, V. A. Khonik
Article
Physics, Condensed Matter
A. S. Makarov, R. A. Konchakov, Yu P. Mitrofanov, M. A. Kretova, N. P. Kobelev, V. A. Khonik
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Chemistry, Physical
V. A. Khonik
Summary: Professor A.V. Granato is a key scientist known for his contributions to understanding dislocation relaxations in crystals. He also proposed the Interstitialcy theory (IT) which offers new insights on melting, equilibrium/supercooled liquids and glasses in relation to the maternal crystalline state. This theory's origins, basic results, and recent developments are briefly discussed in the article.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
R. A. Konchakov, A. S. Makarov, A. S. Aronin, N. P. Kobelev, V. A. Khonik
Summary: Molecular dynamics simulations of aluminum near its melting point show a significant increase in vibrational entropy of interstitial defects with dumbbell configuration. By estimating the density of these defects in the melt through three independent methods, the configurational entropy of the system with defects is determined. Approximately 70% of the total entropy of melting can be attributed to the generation of interstitial dumbbells at T = T-m.
Article
Materials Science, Ceramics
A. S. Makarov, G. Afonin, R. A. Konchakov, J. C. Qiao, A. S. Aronin, N. P. Kobelev, V. A. Khonik
Summary: This study conducted parallel measurements of enthalpy and high-frequency shear modulus changes during structural relaxation of five bulk metallic glasses. The analysis revealed a one-to-one correlation between the change in molar enthalpy and the alteration in the calculated number of defects based on Interstitialcy theory. The defect formation enthalpy derived from this correlation aligns well with the accepted quantity in the Interstitialcy theory.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Physics, Condensed Matter
A. S. Makarov, J. C. Qiao, N. P. Kobelev, A. S. Aronin, V. A. Khonik
Summary: This study focuses on the fragility of supercooled liquids, demonstrating the relationship between fragility and high-frequency shear modulus. The heat capacity jump is also found to be related to fragility and shear modulus relaxation. The results suggest that the evolution of interstitial-type defects frozen-in during glass production mediates the connection between fragility, heat capacity jump, and high-frequency shear modulus in the supercooled liquid state.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
N. P. Kobelev, J. C. Qiao, A. S. Makarov, A. M. Glezer, V. A. Khonik
Summary: The study reports measurements of internal friction and shear modulus of glassy Cu49Hf42Al9 at different frequencies and temperatures. It is found that the relaxation of internal friction and shear modulus decreases with increasing frequency in the investigated range. A new method for determining the Gibbs activation energy of relaxation is derived, and the underlying activation energy spectrum is found to smoothly increase with accessible activation energies in the experiment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Condensed Matter
A. S. Makarov, G. Afonin, J. C. Qiao, A. M. Glezer, N. P. Kobelev, V. A. Khonik
Summary: By performing calorimetric and shear modulus measurements on bulk metallic glasses, this study demonstrates the consistency between the calorimetric determination and calculation of excess thermodynamic potentials, with a focus on the physical origin of these potentials being related to a system of interstitial-type defects frozen-in from the liquid state. The estimates of defect formation enthalpy and entropy indicate that the enthalpy scales with the shear modulus while the entropy is significantly large, aligning with the basic assumptions of the interstitialcy theory.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Condensed Matter
A. S. Makarov, G. Afonin, A. S. Aronin, N. P. Kobelev, V. A. Khonik
Summary: A novel approach is presented in this paper to understand the heat effects caused by structural relaxation of metallic glasses. By applying a general thermodynamic equation, the entropy change in glass relaxation can be determined, and the kinetics of the heat effects controlled by defect-induced structural relaxation can be calculated. The experimental results show a good agreement with the calculated results.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Andrei Makarov, Marina Kretova, Gennadii Afonin, Nikolai Kobelev, Vitaly Khonik
Summary: This study conducted high-precision measurements of the temperature dependences of the shear modulus G in bulk metallic glass. It found that plastic deformation significantly affects the anharmonic, electronic, and relaxation components of G, with the relaxation contribution increasing, anharmonic component increasing, and electronic component decreasing.
Article
Nanoscience & Nanotechnology
A. S. Makarov, G. V. Afonin, R. A. Konchakov, V. A. Khonik, J. C. Qiao, A. N. Vasiliev, N. P. Kobelev
Summary: By introducing a dimensionless order parameter 4, the structural order of glass can be estimated, and this parameter shows a strong correlation with the glass-forming ability.
SCRIPTA MATERIALIA
(2024)
Article
Chemistry, Physical
A. S. Makarov, R. A. Konchakov, J. C. Qiao, A. N. Vasiliev, N. P. Kobelev, V. A. Khonik
Summary: This study investigates the relationship between defect concentration and the structure factor of glasses based on shear modulus measurements and molecular dynamics simulation. The results show that defect-induced disordering is independent of glass thermal prehistory above the glass transition temperature, while significant differences exist between initial and relaxed samples below the transition temperature.
