Article
Materials Science, Multidisciplinary
Qifeng Shu, Chaoge You, Tuomas Alatarvas, Timo Matti Juhani Fabritius
Summary: The occurrence of non-deformable, non-metallic inclusions is the main cause of wire failure during drawing and reduces the service life of certain steel grades, such as tire cord steel. The deformability of glassy inclusions in CaO-Al2O3-SiO2 and MnO-Al2O3-SiO2 systems was investigated using experimental and numerical methods. The Young's modulus and Poisson's ratio were measured and found to be affected by the basicity of the glasses. The equations for calculating Young's modulus were evaluated and modified for accurate estimation. Iso-Young's modulus diagrams were constructed for optimizing inclusion composition during hot rolling and cold drawing.
Article
Materials Science, Ceramics
Rui Yang, Yan Zhang, Qun Zu, Sanxi Huang, Liangzhu Zhang, Lu Deng, Huidan Zeng
Summary: CaO-MgO-B2O3-Al2O3-SiO2 glasses are crucial in the glass fiber industry. Molecular dynamics simulations are used to investigate the structures, thermal stabilities, and elastic moduli of the glasses by gradual substitution between B2O3 and MgO. The results demonstrate that increasing the B2O3/MgO ratios leads to complex coordination changes in aluminum, while four-coordination aluminum remains dominant. The introduction of boron increases the percentages of bridge oxygen and network connectivity, enhancing the glass network and improving thermal stabilities. The study provides insights into the effect of B2O3/MgO ratios on the structures and properties, facilitating the development of high-performance glass fibers.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Valentin A. Gorodtsov, Valentin G. Tkachenko, Dmitry S. Lisovenko
Summary: This study conducted theoretical and numerical analyses on the extreme values of Young's modulus for six and seven-constant tetragonal crystals based on experimental data, revealing their relationship with anisotropy coefficients and characteristics in different crystal structures.
MECHANICS OF MATERIALS
(2021)
Article
Materials Science, Ceramics
Kei Maeda, Kosho Akatsuka, Atsuo Yasumori
Summary: The strength of glass largely depends on the size of flaws on its surface, with large flaws leading to considerable deterioration in strength. The damage resistance of CAS-GC was evaluated in bending tests and showed higher strength and absence of large sharp flaws compared to SLS glass.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yaoming Li, Zhiqiang Fu, Kaihong Zheng, Juan Wang, Xueli Sun
Summary: A new type of glass-ceramic BCAS was developed to join Al2O3 ceramics, and TiO2 was added to promote the crystallization behavior of the glass-ceramics. Rutile TiO2 whiskers were observed to grow on the surface of Al2O3 ceramics in the joints, providing mechanical support. The density of TiO2 whiskers in the joint was found to be the largest when the amount of TiO2 added was 10% (wt%), resulting in the best strengthening effect with a shear strength of 94.33 MPa.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
H. Joshi, Tuan V. Vu, Nguyen N. Hieu, R. Khenata, D. P. Rai
Summary: An ab-initio density functional theory (DFT) method was utilized to investigate the elastic and thermodynamic properties of Fe2CoAl under hydrostatic pressure. It was found that the compound exhibits a mixture of covalent and ionic bonds, and shows ductility at all pressures considered, with various mechanical and dynamical properties showing linear changes under different applied pressures.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Ceramics
T. Carlier, R. Podor, S. Saitzek, L. Montagne, P. Roussel, F. O. Mear
Summary: The crystallization pathways of BCAS glass were determined as a function of time and temperature using various characterization techniques. The composition of crystallized phases depends on the geometry of the glass and applied geometrical constraints, which control the volume fraction of crystallized glass melt and modify reactional pathways.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Tian Xiaokun, Wu Wenxu, Liu Xin, Zhao Jingang, Chen Junzhu, Qu Ya, Xu Yanchao, Liang Xunmei, Yue Yunlong, Kang Junfeng
Summary: This study investigated the structure, thermal stability, spinnability, and fiber tensile strength of CaO-MgO-Al2O3-SiO2 glasses with SiO2 replaced by Al2O3. Results showed that increasing the molar ratio of Al2O3 to SiO2 led to an increase in the polymerization degree of the glass network structure, resulting in higher Tg and thermal stability. The characteristic temperatures and fragility of glassy melts also increased with the increase in Al2O3 to SiO2 ratio. Moreover, the fiber spinnability parameters showed a different trend as the Al2O3 to SiO2 ratio increased, but both indicated the feasibility of continuous fiberglass production.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Multidisciplinary
Lichun Bian, Hao Li, Yong Cheng
Summary: A new molecular model is proposed in this paper to calculate the mechanical properties of carbon nanotubes. The expressions for surface Young's modulus, Poisson's ratio, shear modulus, and bulk modulus show that the mechanical properties of carbon nanotubes decrease with the increase of radius size.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Materials Science, Multidisciplinary
Nejc Novak, Olly Duncan, Tom Allen, Andrew Alderson, Matej Vesenjak, Zoran Ren
Summary: This study analyzed the shear moduli of conventional and auxetic open-cell polymer foams, finding that the measured shear moduli of auxetic foams were generally lower, and the calculated shear moduli were lower than the measured values.
MECHANICS OF MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Yinlong Hou, Kai Ren, Yu Wei, Dan Yang, Zhen Cui, Ke Wang
Summary: In this study, the mechanical properties and anisotropy of an orthorhombic SiP2 monolayer were investigated using first-principles calculations. The results showed that the monolayer exhibits high in-plane anisotropy in terms of Young's modulus and Poisson's ratio. The interatomic force constants were found to be the main origin of this anisotropy. Additionally, negative Poisson's ratios were observed in certain orientations, suggesting potential applications in nanomechanics and nanoelectronics.
Article
Materials Science, Ceramics
Qingong Zhu, Gaoling Zhao, Zhiqiang Cao, Junteng Jin, Gaorong Han
Summary: A new process for phase-separated P2O5-Al2O3 glass with SiO2-rich region is proposed in this study, which consists of second phase, transition region, and matrix region. The formation of the transition region increases the cross-linking of the glass network, leading to an increase in Young's modulus. The Young's modulus of the phase-separated glass increases with decreasing diameter of quartz glass particles, but weakens at a certain diameter due to particle agglomeration and defects.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Shingo Machida, Takuma Yamaguchi, Naoki Emori, Ken-ichi Katsumata, Kei Maeda, Atsuo Yasumori
Summary: The intensity ratio of Tb3+ fluorescence at different wavelengths can be used as a probe to evaluate the crystallization of glass, providing valuable information for glass manufacturing and performance optimization.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Guoxuan Gu, Xin Liu, Lulu Zhang, Xingtao Wang, Wenxu Wu, Yi Cao, Ya Qu, Xianjing Chen, Yunlong Yue, Junfeng Kang
Summary: The influence of mixed alkaline earth effect on the structure and elastic modulus of CaO-MgO-Al2O3-SiO2 glasses was investigated through molecular dynamics simulation. The elastic modulus values obtained using uniaxial tension and stiffness tensor methods showed a consistent trend with composition change, with the former results being closer to the measured data. The variation trend of Qn species obtained through simulation and Raman spectroscopy was consistent. Furthermore, the presence of non-bridging oxygen and the ratio of non-bridging oxygen to tetrahedrally coordinated cations (NBO/T) had a linear relationship with the elastic modulus.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Agronomy
Jiali Fan, Yuyao Li, Bing Wang, Fengwei Gu, Feng Wu, Hongguang Yang, Zhaoyang Yu, Zhichao Hu
Summary: This study determined the Poisson's ratio and Young's modulus of potato main stems at different heights and proposed a new method to determine them. The study provides important data for the construction of models and simulation in potato harvesting, and introduces new ideas for measuring Poisson's ratio and Young's modulus of non-regular cylindrical viscoelastic materials.
