Article
Polymer Science
Jia-Yi Ren, Shu-Gui Yang, Yue Li, Jun Lei, Hua-Dong Huang, Mingwang Pan, Hao Lin, Gan-Ji Zhong, Zhong-Ming Li
Summary: This study investigates the impact of external flow, pressure, and temperature on the crystallization behavior of polymeric blends during processing. It is found that shear flow and pressure can induce the formation of specific phases, while the addition of PMMA stabilizes shear-induced local trans conformation. The synergistic effect of shear flow and PMMA leads to the transformation of PVDF crystalline structure.
Article
Polymer Science
Zongao Dou, Ruru Wan, Hui Shen, Xiaoli Sun, Huihui Li, Shouke Yan
Summary: The structure and organization of PVDF spherulites in blends with PMMA-H and PMMA-L have been studied. It is found that PMMA-H and PMMA-L have different effects on the morphologies of PVDF spherulites, including ring-band spacing, growth rate, alpha- gamma ' transition rate, and the formation mechanism of Wagon-Wheel spherulites.
Article
Polymer Science
Xiaodong Yang, Bin Yu, Hui Sun, Nan Wang, Peng Liu, Jiangli Feng, Xiaogang Cui
Summary: The study investigated the crystallization kinetics, morphology, and structure of ECTFE using DSC, POM, and XRD, revealing various patterns of crystallization processes and changes in crystalline degree.
Article
Polymer Science
Yu-Liang Lin, Song-Yu Tsai, Hung-Chieh He, Lin-Ruei Lee, Jhih-Hao Ho, Chien-Lung Wang, Jiun-Tai Chen
Summary: This study fabricated sc-PMMA nanorods using various pore sizes AAO templates to investigate its crystallization behavior under nanoconfinement. The results show that the crystallization kinetics of sc-PMMA inside nanopores differs significantly from the bulk state, and the preferred orientation of sc-PMMA crystallites is mainly influenced by the degree of spatial confinement and the polymer molecular weight. This work provides a deeper understanding of sc-PMMA under nanoconfinement and offers opportunities for the applications of supramolecular nanostructures in miniaturized devices.
Article
Materials Science, Composites
Jian-Ping Cao, Jun Zhao, Xiaodong Zhao, Zhi-Min Dang
Summary: A facile route to prepare high-performance dielectric nanocomposites of PMMA/PVDF/MWNTs was developed, forming a cocontinuous structure through spinodal phase separation. The composites exhibit excellent ductility and conductivity, providing a general pathway to prepare high-performance dielectric polymer materials containing cocontinuous microscale and nanoscale structures.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Jian Zhou, Shanshan Xu, Jian Song, Ying Zheng, Chengtao Yu, Guorong Shan, Yongzhong Bao, Pengju Pan
Summary: The multilevel structures and structural evolutions of PVDF and PVDF/PMMA films during processing were investigated. PVDF cast films with higher melt-draw ratio showed raw-nucleated lamellar morphology, while blending PVDF with PMMA resulted in the formation of the PVDF beta phase. In the post-stretching process, PVDF cast films underwent various changes, while PVDF/PMMA films were more sensitive to the presence of the alpha phase.
Article
Nanoscience & Nanotechnology
Jiale Fang, Chengqi Chen, Hongxing Qi, Jie Zhang, Xiaoxuan Hou, Likun Pan, Xianghui Wang
Summary: Developing flexible electromagnetic interference (EMI SE) shielding materials is crucial for protecting humans from harmful radiation. We designed and fabricated a flexible multilayer structure of PVDF/GNP-PVDF composite film, which exhibited high EMI SE performance (averaging 69.7 dB in X-band), excellent flexibility, and stability (98.85% retention after bending 1000 cycles at 60 degrees). The theoretical study indicates that the multiple reflection and absorption of electromagnetic waves between layers contribute to the high EMI SE performance of the PVDF/GNP-PVDF multilayer film.
ACS APPLIED NANO MATERIALS
(2023)
Article
Crystallography
Yongri Liang, Susu Wang
Summary: By investigating the factors such as droplet size, solvent evaporation rate, and concentration, the study revealed the impact of the coffee-ring effect on the crystal structure, morphology, and distribution in dried PVDF droplets. Decreasing droplet size and controlling solvent evaporation rate were shown to be effective ways to enhance electroactive crystalline phases nucleation and reduce crystal size.
Article
Polymer Science
Shan Wang, Chun-Yan Tang, Jin Jia, Xiang-Jun Zha, Jun-Hong Liu, Xing Zhao, Kai Ke, Yu Wang, Wei Yang
Summary: We report a method to fabricate high-performance piezoelectric polymer fiber mats by collecting electrospun PVDF fibers using low-temperature electrolytes. The use of liquid electrolytes enables the formation of piezoelectric PVDF crystals with zigzag conformation and the immobilization of aligned dipoles at low temperature. Compared with conventional PVDF fibers, these fiber mats can generate a significantly higher open-circuit voltage and instantaneous output power density, making them suitable for self-powered flexible electronics.
Article
Polymer Science
Tatsuaki Miyashita, Hiromu Saito
Summary: The evolution of gamma-phase spherulites of PVDF-TBAHS during isothermal crystallization was investigated using polarized optical microscopy and light scattering measurements. The results showed a two-stage evolution process, with the growth of disordered domains in the first stage and the increase in ordering due to the increase in lamellar stacks in the spherulite in the second stage. The birefringence of gamma-phase spherulites in PVDF-TBAHS was much smaller than that of alpha-phase spherulites in neat PVDF.
Article
Polymer Science
Jun Zhong, Xinyue Zhang, Xiaofeng Yu, Xuanyu Shi, Shihao Sun, Li Yang, Min Zuo, Yihu Song, Qiang Zheng
Summary: The selective distribution of silica nanoparticles grafted with crosslinked PMMA in PMMA/SAN blend was studied. Highly crosslinked PMMA chains mainly located in the PMMA-rich domains, while linear PMMA chains mainly located at the blend matrix interface. NPs grafted with slightly crosslinked chains were partially located at the interface and partially in the PMMA-rich domains. The deviation between theoretical prediction and actual location of modified NPs may be related to the heterogeneity of miniemulsion polymerization. The different locations of modified NPs induced by different grafted chain structures can result in various compatibilization effects on PMMA/SAN blend.
Article
Polymer Science
Xin Han, Ning Gong, Xiaowen Si, Chenxi Jiang, Jia Xu, Shimeng Sun, PingPing Zhan, Jingshan Mu
Summary: Crystallization-driven self-assembly of PMMA-b-PE-b-PMMA triblock copolymers was studied in toluene and toluene-chloroform mixture solutions. The structure of the amorphous corona-forming block, solvent selectivity, and crystallization temperature were found to play important roles in controlling the morphology of the micelles. Different types of micelles, such as striped disk-like and striped lozenge-shaped micelles, as well as one-dimensional crystalline cocoon silk micelles, were formed depending on the cooling process and crystallization temperature.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Alireza Farazin, Alireza Shakeri, Hossein Mahdavi
Summary: In this study, an amphiphilic block copolymer suitable for modification of forward osmosis (FO) membrane support layers was synthesized using the ATRP method. The addition of this copolymer significantly improved the performance of the support layer, and the best performing membrane exhibited satisfactory FO performance.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Daisaku Gicheha, Aicha Noura Cisse, Ariful Bhuiyan, Nabila Shamim
Summary: This study investigates the kinetics of non-isothermal crystallization of Poly (e-caprolactone) (PCL) and MgO-incorporated PCL nanofibers with different cooling rates using DSC-3. The results reveal that the crystallization rate decreases at higher temperatures. The Mo model is suitable for describing the overall non-isothermal crystallization process of nanofibers, and the activation energy of bulk-PCL is comparatively lower than that of nanofibers, as calculated by the Kissinger and Friedman methods. The investigation of crystallization kinetics plays an important role in optimizing manufacturing processes and enhancing the overall performance of nanofibers.
Article
Thermodynamics
Alireza Hassanjani Roushan, Abdollah Omrani
Summary: The successful synthesis of NaX nanocrystals using an organic, additive-free hydrothermal approach was reported in this paper. The NaX nanocrystals were found to act as an effective nucleating agent in the crystallization of PVA, enhancing the crystallinity degree of the nanocomposite. The effective energy barrier for the PVA/NaX nanocrystals system was shown to be smaller than that of neat PVA using the Friedman isoconversional method.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Chemical
Lucas Dall Agnol, Heitor Luiz Ornaghi, Francisco Monticeli, Fernanda Trindade Gonzalez Dias, Otavio Bianchi
Summary: This study used an artificial neural network and surface response methodology models to predict the calorimetric behavior of certain polyurethane bulk polymerizations, achieving a high level of reliability in predicting reaction kinetics. The polymerization kinetics were found to be influenced by the association phenomena of -OH groups, and the applied methodology can be extended to other materials or properties of interest.
POLYMER ENGINEERING AND SCIENCE
(2021)
Review
Chemistry, Applied
Lucas Dall Agnol, Fernanda Trindade Gonzalez Dias, Heitor Luiz Ornaghi Jr, Marco Sangermano, Otavio Bianchi
Summary: UV-WPU, as an environmentally friendly alternative material with good properties, has been developed with various formulations over the years. However, there is currently no valuable review on the significant influencing factors in UV-WPU manufacture. This study aims to answer specific questions about the state of UV-WPU materials and provide new combinations of raw materials and solutions.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Polymer Science
Lucas Dall Agnol, Giulio Tremea Toso, Fernanda Trindade Gonzalez Dias, Marcio Ronaldo Farias Soares, Otavio Bianchi
Summary: This study presents an interesting alternative to improve the tribological properties of TPUs by incorporating SEBS via melt blending. The addition of mineral oil and compatibilizer affects the phase morphology and rheology, allowing tuning properties such as abrasion and friction coefficient. The swollen state SEBS modifies the TPU's performance, enabling promising applications for these thermoplastic elastomers blends.
Article
Energy & Fuels
Heitor Luiz Ornaghi, Francisco M. Monticeli, Roberta Motta Neves, Lucas Dall Agnol, Otavio Bianchi
Summary: This study aimed to simulate and predict the influence of different ratios of cellulose/hemicellulose/lignin on the thermal degradation behavior of vegetal fibers. The predictions using an artificial neural network combined with a surface response methodology showed high reliability, allowing for the thermal degradation behavior prediction of vegetal fibers with any cellulose, hemicellulose, and lignin ratio.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Physical
Claudio Nunes Pereira, Guilherme Canete Vebber, Raquel S. Mauler, Otavio Bianchi
Summary: Recent studies have shown that using surface tension and solubility parameters can effectively predict the dispersion behavior and compatibility of liquids at the nanotechnology level. The innovative aspect of the research is the proposal of three-dimensional solubility parameters adjusted for surface tension, which helps model processes closely related to surface tension in various applications.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Diana Favero, Victoria Marcon, Lucas Dall Agnol, Clara M. Gomez, Ana Cros, Nuria Garro, Maria J. Sanchis, Marta Carsi, Carlos A. Figueroa, Otavio Bianchi
Summary: This study investigates the effect of different chain extenders on the structure-property relationships of soy-based polyurethanes during hydrolytic degradation. It is found that the addition of chain extenders accelerates the degradation of flexible domains, resulting in a stiffer and more brittle polymer. Hydrolytic degradation also leads to the formation of new infrared absorption peaks and increased phase separation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Claudio Nunes Pereira, Guilherme Canete Vebber, Raquel S. Mauler, Otavio Bianchi
Summary: This publication presents the achievement of partial surface tension properties of liquids using an adapted Good-Girifalco approach. The results show that the interfacial tension data of water is suitable for estimating the dispersive component of surface tension, while the interfacial tension of squalene is more accurate for calculating the polar component. The proposed method strengthens the relationship between solubility parameters and surface tension parameter, which is of great importance for the field of Materials Science.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Juliano R. Ernzen, Carlos H. Romoaldo, Cedric Gommes, Jose A. Covas, Angel Marcos-Fernandez, Rudinei Fiorio, Otavio Bianchi
Summary: This study investigates the effect of two different chain extenders and their combination on the structure-property relationships of thermoplastic polyurethanes (TPUs). The results show that increasing dipropylene glycol (DPG) content reduces the organization of the rigid segments and the degree of phase separation in TPUs, resulting in increased polydispersity of the interdomain distance and transparency in the UV-visible spectrum. Furthermore, increasing DPG content reduces the amount of hydrogen bonds present in the rigid phase and increases the glass transition temperature of the flexible phase. Consequently, increasing DPG content leads to a deterioration in mechanical properties and hydrolysis resistance in TPUs.
Article
Polymer Science
Otavio Bianchi, Patricia Bereta Pereira, Carlos Arthur Ferreira
Summary: This study explores the use of a high-speed thermokinetic mixer for recycling ground tire rubber (GTR) through mechanochemical treatment. Different processing conditions are found to reduce the gel fraction and result in various degradation effects and physicochemical changes. An artificial neural network is utilized to describe and correlate the thermal degradation profile with the processing conditions and characteristics of the GTR.
Article
Polymer Science
Joziel A. Cruz, Sandro C. Amico, Otavio Bianchi
Summary: This study focuses on the effect of aramid pulp (1 wt.%) on the equilibrium swelling, enthalpy reaction, solid viscoelastic properties, and rheokinetics of castor oil and polyether polyol blend with polymeric isocyanate. Aramid pulp increases the crosslink density and slightly restricts the swollen volume, but does not change the reaction mechanism. It also improves the orderliness of the PU structure.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Environmental
Leonardo Davi Bonatto, Lucas Dall Agnol, Vinicius Polo Vergani, Claudio Antonio Perottoni, Otavio Bianchi, Janete Eunice Zorzi
Summary: Wild moth silk fibers have distinct properties from cultivated silk and show promising applications. However, few Lepidoptera species have had their silk properly characterized. Silk is used for various purposes in Lepidoptera, including cocoon construction, collective shelters, migration, lifelines, and prey capture. Understanding the composition and properties of these silks can help understand their role in biology and potential applications. The results of this study provide insights into the mechanical properties of different Lepidoptera silks and the correlation with specific components.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Polymer Science
Joziel Aparecido da Cruz, Eduardo Fischer Kerche, Otavio Bianchi, Andrea Manes, Sandro Campos Amico
Summary: This study evaluates the hybridization effect of S2-glass/aramid on polyurethane composites produced by vacuum infusion. The main results show that the pure glass composites have higher density, tensile stiffness and strength, while the aramid laminates have higher impact energy absorption capability. The hybrid laminates have intermediate properties.
Article
Polymer Science
Heitor Luiz Ornaghi, Andres Nohales, Manuel Asensio, Clara M. Gomez, Otavio Bianchi
Summary: This study investigated the effect of chain extenders with different numbers of carbon atoms on the thermal degradation behavior of thermoplastic polyurethanes. Differential scanning calorimetry and thermogravimetric analysis were used to evaluate phase separation and thermal degradation, respectively. The results provided valuable insights into the degradation mechanisms and allowed for the prediction of materials' endurance time and thermal degradation behavior.
Article
Polymer Science
Otavio Bianchi, Joziel A. Cruz, Lucas Paim, Alessandra Lavoratti, Zainab Al-Maqdasi, Sandro C. Amico, Patrik Fernberg, Roberts Joffe
Summary: This study investigated the characteristics of epoxy nanocomposites containing diglycidyl ether of bisphenol-A (DGBEA), graphene nanoplates (GN), and carbon nanotubes (CNT) at different weight percentages. The compatibility of the nanoparticles with the epoxy matrix was assessed using three-dimensional solubility parameters (3DSP). It was found that CNT demonstrated better compatibility with epoxy than GN due to the presence of oxygenated species on the nanoparticle surface. Rheological percolation occurred in CNT systems at concentrations above 0.2%, while GN did not display percolation even at 2% concentration. The incorporation of nanoparticles led to increased curing enthalpy and a reduced glass transition temperature (T-g), indicating restricted molecular mobility. Surprisingly, T-g consistently increased during composite annealing, regardless of nanoparticle type or concentration, potentially due to the formation of a three-dimensional network structure between the nanoparticle-oxygenated groups and the epoxy matrix. This phenomenon had a crucial impact on the creep and irreversible deformations of the nanocomposites, distinguishing them from pure resin behavior.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Juliano R. Ernzen, Jose A. Covas, Angel Marcos-Fernandez, Rudinei Fiorio, Otavio Bianchi
Summary: This study focuses on the synthesis of thermoplastic polyurethanes (TPUs) using a renewable bio-based polyol obtained from soybean oil. The addition of this bio-based polyol enhances compatibility between the segments of the TPU but may also promote cross-linking. Adding small amounts of the bio-based polyol results in high-molecular-weight TPUs with lower polarity, suitable processability, and improved mechanical properties.
Article
Materials Science, Ceramics
Deniz Bozoglu, Sahin Yakut, Kemal Ulutas, Deniz Deger
Summary: Thin film polyethylene oxide, produced by the thermal evaporation technique, exhibits structural and property differences compared to bulk polyethylene oxide. The dielectric constant of polyethylene oxide thin film is 10 times greater than that of bulk polyethylene oxide. There is consistency among dielectric constants, activation energies, and free volume fractions for both thin film and bulk samples. Polyethylene oxide thin film is observed to be more brittle than bulk polyethylene oxide.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Xiaozhen Fan, Zhuo Wang, Zheng Fang, Huiqun Ye, Jinju Zheng, Jianqiang Zhang, Yanjun Qin, Yao Zhai, Yanlong Miao, Zixiang Zhao, Can Yang, Jiajun He, Zhenghang Wei, Yunzhang Fang
Summary: The microscopic strain evolution and microstructural of FeCuNbSiB amorphous alloy samples were studied under both free and tensile stress annealing conditions. It was found that an amorphous-nanocrystalline structure was developed in both samples after annealing at 813 K, and the size of nanocrystals was limited by the applied stress.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Atsushi Tanaka, Atsuki Saito, Takashi Murata, Ayako Nakata, Tsuyoshi Miyazaki
Summary: Although molecular dynamics (MD) simulation is a powerful tool for investigating the atomic-scale structures of complex materials, its reliable and accurate application to multi-component glass systems faces challenges due to limited force fields (FFs) and the complexity of chemical environments. This study demonstrates the feasibility of efficient and accurate large-scale density functional theory (DFT) calculations for multi-component glass systems. The evaluation of classical FFs based on the results of large-scale DFT calculations reveals low accuracy for non-bridging oxygen atoms, and differences in Si-O-Si angle distribution and electronic structure for X = Mg.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Petr Shvets, Ksenia Maksimova, Aleksandr Goikhman
Summary: In this study, vanadium oxide xerogel samples were successfully synthesized through a liquid phase reaction and the interaction of films with water. The samples were thoroughly analyzed using X-ray diffraction and Raman spectroscopy, revealing the existence of two distinct phases. It was also discovered that previous misinterpretations regarding the high-pressure polymorph structure were due to the formation of a high-temperature phase. These findings highlight the potential for further refining and expanding the current structural models of vanadium oxide xerogel in future research efforts.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Yiran Zhang, Jing Pang, Qingchun Xiang, Dong Yang, Yinglei Ren, Xiaoyu Li, Keqiang Qiu
Summary: The effect of the volume fraction of body-centered cubic (BCC) crystal on the room temperature brittleness of Fe-based amorphous nanocrystalline alloys was investigated. Molecular dynamics simulations were conducted to obtain seven model samples with different embedded BCC nanocrystal contents. The results showed a gradient decrease in the plasticity of the alloys with different nanocrystal contents.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Moustafa Sahnoune Chaouche, Hani K. Al-Mohair, Shavan Askar, Barno Sayfutdinovna Abdullaeva, Naseer Ali Hussien, Ahmed Hussien Alawadi
Summary: In this work, a novel micromechanical data-driven machine learning framework was proposed to characterize material parameters in bulk metallic glasses. The framework utilized nanoindentation simulations with Berkovich and spherical tips to compile a vast collection of data on material behavior in BMGs. The developed machine learning model efficiently predicted critical material properties and highlighted the importance of input feature weight functions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Louisiane Verger, Vinuyan Ganesaratnam, Virginie Nazabal, Sebastien Chenu, Christophe Calers, David Le Coq, Laurent Calvez, Olivier Hernandez, Xiang-Hua Zhang
Summary: Crystallization in Ga, Sb, and Se glasses was studied, and a correlation between Se content, crystalline phases, and electrical conductivity was observed. The resulting glass-ceramics exhibited significantly higher conductivity compared to other Se-based glass-ceramics.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Seong-Sik Shin, Ga-Yeong Kim, Byeonggwan Lee, Jae-Hwan Yang, Yeon-Su Son, Jung-Hoon Choi, Jae-Young Pyo, Ki Rak Lee, Hwan-Seo Park, Hyun Woo Kang
Summary: In this study, silver tungstate-tellurite glass with different loading of AgI was developed for immobilization of radioactive iodine. The effects of increasing the amount of AgI on the glass matrix were investigated. The leaching properties of all samples were evaluated, and it was found that the release of all elements satisfied the US regulation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Chunghee Nam
Summary: This study demonstrates the prediction performance of a CNN regression model for the magnetic entropy changes and transition temperatures of bulk metallic glasses with magnetocaloric effects. The model achieved high prediction performance, as measured by the determination coefficient and root mean square error. The results showed good agreement with experimental values and reported results.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
A. Hosny, Y. M. Moustafa, G. El-Damrawi
Summary: In this study, crystalline glass ceramics were obtained directly from glasses using an ion exchange process between lead bromide and oxygen ions. The addition of lead bromide caused significant changes in the glass structure and the formation of specific crystalline phases.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Luana Cristina Feitosa Alves, Jheimison Ferreira Gomes, Natacya Fontes Dantas, Maria Nayane Queiroz, Pablo Nabuco Portes, Francielle Sato, Nilma de Souza Fernandes, Karina Miyuki, Celso Vataru Nakamura, Alysson Steimacher, Franciana Pedrochi
Summary: This study evaluated the influence of CaF2 addition on the bioactivity of the samples. The results showed that the samples exhibited good bioactivity and cytocompatibility, making them suitable for biomedical applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
N. Keninger, S. Feller
Summary: The principles of Topological Constraint Theory (TCT) were used to study alkali borate and silicate glass systems. Structural models were developed based on experimental data and used to predict properties of the glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Hao Wang, Chengliang Zhao, Chuntao Chang, Shengli Zhu, Zhankui Zhao
Summary: The relationship between the heterogeneous structure and structural relaxation in metallic glasses was explored by investigating the quasielastic and viscoelastic behavior of a Zr55Cu30Ni5Al10 metallic glass. Stress-annealing treatment was used to retain elastic strain energy, and a unique creep recovery phenomenon was observed during the reheating process. The Maxwell model was employed to qualitatively describe the mechanisms of elastic strain energy retention and release.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Sihyung Lee, Giyeol Han, Karuppasamy Pandian Marimuthu, Hyungyil Lee
Summary: This study presents a method for extracting FVM parameters of Zr-based TFMG using MD and FEA, and validates the method through simulation and experiments.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Nedra Saad, Mohamed Haouari, Mayssa Ibrahim, Noura Amamou
Summary: In this work, we investigated the optical properties of a fluorophosphate glass system doped with Tb3+ and Eu3+ ions. We found that the emitted light can be tuned by changing the doping concentration, excitation wavelength, or excitation power, which is important for the design of solid-state lighting sources.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
