Article
Mechanics
Dong Han, Xu Jia, Huajun Zhang, Xiguang Gao, Xiao Han, Li Sun, Zhikang Zheng, Lu Zhang, Fang Wang, Yingdong Song
Summary: This study investigated the impact damage and penetration mechanisms of CVI-fabricated SiC/SiC composite plates through impact testing and microscopic observation, and explored the effect of FOD on the tensile behavior of the composite material.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Yanchao Wang, Yexin Zhou, Chunhua Jin
Summary: An analytical model is proposed in this paper to describe the nonlinear behavior of a plain-woven composite. The model combines a discrete method with a three-phase micromechanical bridging model, and it can effectively simulate the behavior of the composite under complex load cases.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Ceramics
Jia-Qi Song, Lian-Yi Wang, Jun-Tong Huang, Hui-Yong Yang, Peng Huang, Hao Luo, Jin-Sen Wang, Kai Zheng, Rui-Ying Luo
Summary: This study evaluated the mechanical properties of 2D woven SiCf/SiC composites fabricated via precursor infiltration and pyrolysis (PIP) through a three-point bending test. The failure processes of the composites under different loading directions were monitored using an acoustic emission (AE) system and digital image correlation (DIC) technique. The results showed that the damage process was dominated by compressive stress in composites loaded parallel to the layup direction, while tensile stress primarily affected composites loaded perpendicular to the layup direction. The complementary results obtained from the AE system and DIC technique demonstrate the effectiveness of multiple analytical methods in assessing the mechanical behavior of SiCf/SiC composites.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Aerospace
Hongnian Dong, Xiguang Gao, Sheng Zhang, Guoqiang Yu, Yingdong Song, Fang Wang
Summary: In this study, the fatigue life of plain-woven SiC/SiC composites was predicted using a multi-scale method. By combining micromechanical model with mesoscale finite element model, the mechanical relationships of yarns were derived, and a fiber random fracture model was adopted to simulate the fatigue failure of the yarns. The exponential increase in the number of fatigue cycles was used to improve the prediction speed of fatigue life, and the predicted results were in good agreement with experimental data.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Hongnian Dong, Xiguang Gao, Sheng Zhang, Yingdon Song, Jinshan Yang, Fang Wang
Summary: Heat treatment can improve the mechanical properties of composites by releasing thermal residual stress, although it may damage the fiber.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Multidisciplinary
John Holmes, Silvano Sommacal, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: This study investigates the deformation response of multi-ply woven composites at different angles by combining digital image correlation (DIC) and 3D micro-computed tomography (mu CT). Significant mechanical property variances and topographical/strain differences were observed between orientations due to layer alignment. Additionally, inter-tow and intra-tow shearing during off-axis extension and corresponding fiber reorientation were identified, highlighting the benefits of combining DIC and mu CT.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Mechanical
Jiajia Yu, Zhongxiang Pan, Qimao Cai, Fa Zhang, Zhenyu Wu
Summary: The open-hole tensile properties and failure mechanism of plain woven carbon fiber, glass fiber, and carbon/glass hybrid fiber composites under on-axis and off-axis loads were investigated. The numerical simulation provided a good explanation for the damage development. The carbon/glass hybrid composites showed improved failure strain and toughness compared to pure carbon fiber composites.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Yifan Ma, Yazhi Li, Lu Liu
Summary: An experimental method is developed for non-standard off-axis tension tests of unidirectional composites. A new oblique end-tab design eliminates stress concentration and in-plane bending moment induced by off-axis tension loading. Finite element analysis and experiments on PEEK/AS4 unidirectional thermoplastic composites were conducted to evaluate the proposed testing method's effectiveness. Simulation and test results show that the use of oblique end-tabs eliminates stress concentration and bending movements.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Gang Liu, Kai Huang, Yucheng Zhong, Zhixing Li, Hongjun Yu, Licheng Guo, Shuxin Li
Summary: A novel computational model is established to analyze the damage of 3D angle-interlock woven composites. By validation and prediction, the model can accurately predict the tensile response of the composites at different angles.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Jinkang Du, Guoqiang Yu, Huajun Zhang, Yunfa Jia, Ruixiang Chen, Chenyang Liu, Xiguang Gao, Fang Wang, Yingdong Song
Summary: The ablation characteristics of plain-woven SiC/SiC composites were studied using an oxy-acetylene flame, showing a linear decrease in ablation rate over time and the formation of porous tubular structures and micro-pits on the surface of SiC fibers.
Article
Materials Science, Multidisciplinary
S. Z. H. Shah, P. S. M. Megat-Yusoff, Tahir Sharif, Syed Zahid Hussain, R. S. Choudhry
Summary: This study presents a comparison of off-axis tensile performance between two types of 3D fibre reinforced composites with different matrices. The results show that thermoplastic composites are notch insensitive and have higher failure strains and energy absorption compared to thermoset composites.
MECHANICS OF MATERIALS
(2022)
Article
Materials Science, Ceramics
Shihao Zhou, Guoqiang Yu, Zheng Ni, Jinkang Du, Chuyang Xie, Xiguang Gao, Yingdong Song
Summary: Plain-woven SiC/SiC Z-pinned joints were prepared using chemical vapour infiltration. The oxidation behaviors and failure mechanism of the joints were investigated through push-out tests before and after oxidation. Microstructural analysis showed that the pin near the surface had a more severe oxidation degree than the middle region. An acoustic emission (AE) system was used to monitor internal damage and pattern recognition was employed to study the evolution of failure during the test. Combined with the failure morphology, all AE signals were identified as matrix cracking, fiber-matrix debonding, matrix peeling, and fiber breakage. The results indicate that the failure mechanism of the Z-pinned joints under axial loading is predominantly governed by fiber-matrix debonding and matrix cracking.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Mingming Chen, Qinghui Liu
Summary: A multi-scale modelling approach was developed in this paper to predict the progressive damage and failure behaviour of 2D woven SiC/SiC composites. By establishing models at the tow scale and meso-scale, the damage and failure processes of the composite were successfully simulated.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Jie Sun, Ang Wang, Hongneng Cai, Xuecheng Han, Zhiyuan Wei, Yaping Huang
Summary: A novel multiscale progressive damage model is proposed in this paper to study the mechanical behavior and damage mechanism of plain woven composites. The model considers the macroscopic behavior of composites by using three-dimensional solid elements and incorporates mesoscale constitutive relationships for the yarn and matrix. By introducing the stress amplification factor (SAF) database based on the microscopic representative volume element (RVE), a progressive damage model is developed using the micro-mechanics of failure (MMF) theory. Validation experiments show that the model accurately predicts the behavior of the composites in quasi-static tension. The proposed multiscale method can be further applied to predict the strength and damage of full-size woven composites under complex loading conditions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Ceramics
Clifton H. Bumgardner, Frederick M. Heim, David C. Roache, Alex Jarama, Morgan C. Price, Christian P. Deck, Xiaodong Li
Summary: Evaluation of SiC/SiC CMCs in tension and bending under different loading conditions reveals insights into crack initiation, stress redistribution mechanisms, and microstructural influences. The study reaffirms the current state of these composites for energy applications and provides valuable information for further improvements in SiC/SiC and other CMCs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)