Article
Materials Science, Ceramics
Yin Zhang, Wei Zhu, Zhaolong Hao, Anhai Yang, Hao Xu, Feng Jiang
Summary: A series of lead-free phosphate glasses were prepared by traditional high temperature melting method with different chemical compositions. The formation region of P2O5-Bi2O3-CaO glass system was determined. X-Ray diffraction confirmed the amorphous nature of glass samples within a certain composition range, and analyzed the crystal structure of BiPO4 and Bi2P4O13 in the crystallized glass. The effect of different chemical compositions on the vibration of Q elements in phosphobismuth glass structure was studied. The research resulted in a lead-free low-melting phosphate glass with excellent comprehensive performance, making the P2O5-Bi2O3-CaO glass system a potential candidate for sealing material.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Danqi Yin, Kuo-Hao Lee, Collin J. Wilkinson, Yongjian Yang, Karan Doss, John C. Mauro
Summary: Dynamical heterogeneities in glass-forming systems result in spatiotemporal fluctuations and a wide distribution of relaxation rates. This study investigates the dominant factors governing dynamical heterogeneities in borosilicate glass. Molecular dynamics simulations using the isoconfigurational ensemble method were performed to study the dynamical heterogeneities of two alkali-(alumino)borosilicate glasses. It was found that alkali ions exhibit high dynamical propensities in local spatial regions. The number of bridging oxygens for boron and silicon does not monotonically correlate with their corresponding dynamical propensities.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Biochemistry & Molecular Biology
Francesco Rusciano, Raffaele Pastore, Francesco Greco
Summary: Recent works reveal that glass-forming liquids exhibit Fickian non-Gaussian diffusion, with non-Gaussian displacement distributions persisting even after attaining linearity in mean square displacement. These non-Gaussian deviations exhibit exponential tails with a growing decay length proportional to a power-law in time. The study examines data from different glass-forming systems and identifies a scaling law for the decay length, which holds for all systems regardless of dimensionality. Additionally, a universal characteristic time for the disappearance of exponential tails and the recovery of Gaussianity is found across different temperatures/concentrations within each system, related to the onset of Fickianity through a power-law.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
S. J. Wu, Z. Q. Liu, R. T. Qu, Z. F. Zhang
Summary: By establishing quantitative correlations among compositions, elastic constants, GFA, and mechanical properties of metallic glasses (MGs), it is possible to predict their performance in advance. Experimental data confirms the validity of this predictive approach. A strategy for designing MGs with optimal combinations of strength, toughness, and GFA is proposed to allow for high-throughput discovery of glass formers with excellent mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Review
Materials Science, Multidisciplinary
Aleksandra Drozd-Rzoska, Sylwester J. Rzoska, Szymon Starzonek
Summary: The report proposes a distortions-sensitive and linearized derivative-based analysis to address the lack of ultimate scaling relations for previtreous changes in glass-forming systems. The method is capable of validating scaling relations in various glass transition models and provides alternative formulations based on fragility. The report also demonstrates the successful validation of the derived relations using experimental data from a homologous series of polyols.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Shan Zhang, Chao Wei, Zhilin Shi, Haoran Zhang, Mingzhen Ma
Summary: Fe doping significantly improves the glass-forming ability, stability, and mechanical properties of Zr50Cu34-xFexAl8Ag8 metallic glasses. The addition of Fe inhibits the formation of crystalline phases, increases the glass-forming ability, and enhances the fracture strength and ultimate strain of the metallic glass samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Weihuo Li, Ying Huang, Qiang Wang, Xu Zhou, Ding Ding, Lei Xia
Summary: This paper investigates the glass-forming ability and magnetic properties of Tb65Ni35-xCox amorphous ribbons. The T-rg and gamma of the ribbons reach their maximum when x = 20, indicating the optimal glass-forming ability of the Tb65Ni15Co20 amorphous alloy. The amorphous alloy exhibits a Curie temperature of approximately 79 K and shows typical spin-glass-like behavior. The magnetic entropy change peak value is up to 9.47 J kg(-1) K-1 under 5 T.
Article
Materials Science, Ceramics
Y. Tan, Y. W. Wang, X. W. Cheng, Q. Fu, Z. H. Xin, Z. Q. Xu, H. W. Cheng
Summary: The study found that appropriate Al substitution can improve the glass-forming ability, strength, and plasticity of amorphous alloys, but fracture strength decreases and no dynamic compression plasticity is observed during dynamic loading.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Mehdi Malekan, Reza Rashidi, Mansoor Bozorg, Nick Birbilis
Summary: The effect of yttrium (Y) on the glass-forming ability (GFA), mechanical properties and corrosion of (Cu50Z-r43Al7)100-xYx alloys was studied. The addition of Y improved the GFA of Cu50Zr43Al7 alloy, with a GFA of 15 mm obtained for (Cu50Zr43Al7)98Y2. The bulk metallic glasses (BMGs) exhibited limited plastic strain but achieved high compressive fracture strength and Young's modulus. The corrosion resistance of the BMGs was improved by the addition of Y.
Article
Chemistry, Multidisciplinary
Teerat Watcharatpong, Taweesak Pila, Thana Maihom, Tomohiro Ogawa, Takuya Kurihara, Koji Ohara, Tadashi Inoue, Hiroyasu Tabe, Yong-Sheng Wei, Kanokwan Kongpatpanich, Satoshi Horike
Summary: The melt state structure of a one-dimensional coordination polymer crystal has been characterized using various techniques. It was found that a coordination polymer-forming liquid is formed above its melting temperature, with the coordination bonds preserved. The presence of variable chain configurations and moderate cohesive interactions in adjacent chains is crucial for this rarely observed phenomenon. The structure of the melt is similar to common one-dimensional organic polymer melts.
Article
Materials Science, Multidisciplinary
Lucas. M. Ruschel, Oliver Gross, Benedikt Bochtler, Bosong Li, Bastian Adam, Nico Neuber, Maximilian Frey, Sergej Jakovlev, Fan Yang, Hao-Ran Jiang, Bernd Gludovatzc, Jamie. J. Kruzic, Ralf Busch
Summary: Ni-Nb-based bulk glass-forming alloys have excellent mechanical properties, but limited glass-forming ability. This study shows that minor additions of P and partial substitution of Nb by Ta can significantly enhance the glass-forming ability. The modified alloys exhibit high strength, extended plasticity, increased hardness, and an extended supercooled liquid region.
Article
Materials Science, Ceramics
J. Y. Cho, H. J. Kim, S. H. Jeong, J. H. Kim, M. J. Lee
Summary: In this study, we investigated the physical and optical properties of barium germanium (BaO-GeO2) glass samples with varying BaO concentrations. The results showed that refractive indices, glass transition temperatures, molar volumes, and coefficients of thermal expansion increased with BaO concentration. Raman spectra revealed structural network modifications and typical Germanium glass bands.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Andrzej Nowok, Wioleta Cieslik, Mateusz Dulski, Karolina Jurkiewicz, Joanna Grelska, Jose Aleman, Robert Musiol, Anna Z. Szeremeta, Sebastian Pawlus
Summary: This article uses a combination of quantum computations and various studies to analyze the nature of atypical bifurcated hydrogen bonds (BHBs). The experiments prove that self-organization through BHBs is prevalent in H-bonding systems, even with high screening of proton-donor and proton-acceptor groups. It is also shown that even highly sterically hindered Schiff bases can form lasting centrosymmetric dimers through BHBs. The driving force for their ordering tendency is the disorder in the molecular scaffold.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Ceramics
Yanming Zhang, Liping Huang, Yunfeng Shi
Summary: This study presents a novel method to calculate viscosity of liquid and glass, which is verified through molecular dynamics simulations. The model can reliably estimate equilibrium and nonequilibrium viscosities of glass, providing important theoretical support for studying glass transition and relaxation of amorphous solids.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Jairo F. Ortiz-Mosquera, Adriana M. Nieto-Munoz, Ana C. M. Rodrigues
Summary: This study investigates the microstructure, thermal properties, and structural changes during crystallization of Na3.4AlxSc2-xSi0.4P2.6O12 NASICON compounds. It is found that adding aluminum in the NASICON structure improves glass-forming ability but decreases ionic conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
