Article
Materials Science, Ceramics
Ankur Sharma, D. B. Karunakar
Summary: The addition of SiC and TiC was found to significantly affect the microstructure and mechanical properties of ZrB2-based composites, with different ratios of reinforcements having distinct impacts on the final performance.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Manufacturing
James W. Kemp, Abel A. Diaz, Elizabeth C. Malek, Brendan P. Croom, Zlatomir D. Apostolov, Surya R. Kalidindi, Brett G. Compton, Lisa M. Rueschhoff
Summary: Ultra-high temperature ceramics (UHTCs) are of interest due to their high melting temperatures and ablation resistance, but their widespread use is limited by low fracture toughness and processing challenges. This study introduces fiber-reinforced UHTC matrix composites (UHTCMCs) produced via direct ink writing (DIW), with up to 47.5 vol% of ZrB2 and up to 10 vol% of SiCf. The research demonstrates the successful fabrication of UHTCMCs with aligned fiber reinforcement and discusses defects occurring during the DIW process.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Ceramics
Cheng Hou, Xiaochao Jin, Litao Zhao, Pan Li, Xueling Fan
Summary: In this paper, the tensile strength and fracture toughness of ZrB2-SiC ceramic were obtained from three-point bending tests using the boundary effect model (BEM). The results show that these mechanical properties can be simply predicted based on the BEM method, and the grain sizes, tensile strength, and fracture toughness of the ceramic follow a normal distribution law.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Zhangwen Wang, Bing Wang, Sai Li, Xiangyu Jin, Xinghong Zhang, Songhe Meng, Guodong Fang
Summary: The oxidation kinetics and microstructural evolution of Cf/ZrB2-SiC composites are studied, and an empirical model is established for predicting the oxidation behavior. Three oxidation mechanisms of carbon phase controlled by reaction and diffusion kinetics, categorized as uniform, non-uniform, and superficial oxidation, are identified based on morphology observations and in-situ tensile responses. The relationship between fracture modes and internal fiber microstructures suggests that the toughening mechanism transition induced by oxidative damage is the structural origin of the fracture mode transition.
Article
Materials Science, Multidisciplinary
Ankur Sharma, Dagarapu Benny Karunakar
Summary: The effects of SiC and MgO on various properties of spark plasma sintered ZrB2-based composites were investigated. The results show that the addition of SiC and MgO can reduce residual stresses, improve relative density and microhardness. In addition, the addition of MgO also enhances fracture toughness, critical energy release rate, and ablation resistance. Finally, the composites retain high hardness and fracture toughness after ablation testing.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Zhigang Zhao, Kezhi Li, Wei Li
Summary: ZrC-SiC-ZrB2 and ZrC-SiC inhibited carbon/carbon composites wedge shaped components were fabricated by reactive melt infiltration and tested on an oxyacetylene torch at a heat flux of 2.38 MW/m2 for 120 s. Compared with C/C composites, both inhibited composites components exhibited better ablation resistance with tip temperatures reaching about 2500 degrees C. Structural evolution on the surfaces of the inhibited composites components included a porous ZrO2 layer near the tip, layered structure of the outer ZrO2 layer, subsurface ZrO2-SiO2 layer in the intermediate region, and SiO2 layer in the tail.
Article
Materials Science, Ceramics
Ales Buyakov, Vasiliy Shmakov, Svetlana Buyakova
Summary: This study examines the impact of structural architecture on the fracture toughness and self-healing ability of ZrB2-SiC-TaB2 composites. It is found that the dual composite architecture enhances the fracture toughness through crack arrest and elastic microstress fields. Additionally, the SiC component enables the composites to self-heal surface defects at high temperatures, thereby preventing crack initiation. The analysis of residual strength after self-healing helps determine the optimal matrix-inclusion ratio for minimizing reliability loss.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
Bo-Wen Chen, De-Wei Ni, Jun Lu, Fei-Yan Cai, Xue-Gang Zou, Yu-Dong Xue, Hai-Jun Zhou, Yu-Sheng Ding, Shao-Ming Dong
Summary: Microstructure and mechanical behaviors of 2D-C-f/ZrB2-SiC composites were examined, showing the critical role of interface structure in determining mechanical properties. The composites displayed varied mechanical behaviors at different temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jecee D. Jarman, William G. Fahrenholtz, Greg E. Hilmas, Jeremy L. Watts, Derek S. King
Summary: The mechanical properties of welded SiC-ZrB2 and SiC-ZrB2-ZrC ceramics were measured and compared. The toughness and strength of the parent materials decreased after welding. The strength of the parent materials was influenced by the size of SiC clusters, while the strength of the welds was controlled by the size of pores in the fusion zones.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Tao Li, Yulei Zhang, Jiachen Li, Junshuai Lv, Kang Shuai
Summary: A SiC/SiC-MoSi2-ZrB2 composite ceramic coating was designed and prepared on the surface of C/C composites using a three-step process. The coating showed excellent mechanical and antioxidative properties.
Article
Materials Science, Ceramics
Yashpal Gupta, B. Venkata Manoj Kumar
Summary: This study investigates the friction and wear of spark plasma sintered ZrB2-SiC composites in dry unlubricated conditions against different counterbodies. It is found that composites with higher SiC content exhibit lower friction and wear, and the thermal conductivity of the counterbody influences the friction and wear of the composites.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Mechanical
T. Reimer, G. D. Di Martino, D. Sciti, L. Zoli, P. Galizia, A. Vinci, M. A. Lagos, N. Azurmendi
Summary: The development of new Ultra High-Temperature Ceramic Matrix Composites (UHTCMC) for use in severe space applications lacks sufficient data regarding the properties influencing structural behavior. This study proposes and applies two different methodologies to investigate the fatigue life of UHTCMCs based on ZrB2-SiC, resulting in the determination of their sigma/N curves.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Rubia Hassan, R. Sarvesha, Kantesh Balani
Summary: The role of carbon nanotubes (CNTs) in the solid solutioning of SiC reinforced HfB2 + ZrB2 has been studied. Incomplete solid solutioning was observed in the presence of 20% SiC under the given sintering conditions. However, the addition of CNTs resulted in the formation of heterogeneous solid solution, as confirmed by SEM, TEM, EDS analysis, and XRD peak de-convolution. The presence of CNTs and defect structures in the SiC phase were attributed to compressive stresses generated during the cooling process after sintering. With CNTs reinforcement, the micro-hardness and elastic modulus increased, while the oxidation resistance decreased.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Eid M. Alosime, Mohammed S. Alsuhybani, Mohammed S. Almeataq
Summary: The study aims to develop a structural ceramic for high-temperature applications using SiC as matrix composites and analyzing the plasma spray coating of SiC and ZrB2. The results show a great potential for the studied material in protecting against high-temperature oxidation and in a wide variety of aerospace applications.
Article
Materials Science, Ceramics
Chaojuan Li, Ruzhuan Wang, Xiaorong Wang, Dingyu Li, Weiguo Li
CERAMICS INTERNATIONAL
(2020)
Article
Physics, Condensed Matter
Xuyao Zhang, Weiguo Li, Jiaxing Shao, Yong Deng, Jianzuo Ma, Ying Li, Dingyu Li
PHYSICA B-CONDENSED MATTER
(2020)
Article
Materials Science, Ceramics
Ruzhuan Wang, Xiaorong Wang, Dingyu Li, Weiguo Li
Summary: A novel and simple model for determining the temperature-dependent hardness of ceramics based on the concept that the maximum energy storage limit of a ceramic is associated with the material yielding under indentation is presented. The model characterizes the temperature-dependent hardness for the first time using only the Young's modulus and the melting point of the material without requiring fitting parameters. Good agreement between predicted results and experimental measurements is achieved for a variety of ceramic materials, establishing the model as a starting point for evaluating the temperature dependence of ceramic material hardness.
CERAMICS INTERNATIONAL
(2021)
Article
Mechanics
Ruzhuan Wang, Shu Wang, Dingyu Li, An Xing, Jun Zhang, Weiguo Li, Chuanzeng Zhang
Summary: The paper proposes novel theoretical models for predicting the temperature-dependent contact mechanical properties of particulate composites in Hertzian contact. By expressing the basic material properties, the models reveal that the temperature mainly affects the contact damage behavior through the temperature-dependent Young's modulus and specific heat capacity.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Mechanics
Peidong Li, Dingyu Li, Qingyuan Wang, Kun Zhou
Summary: This paper proposes a phase-field approach to simulate hydro-thermally induced crack propagation in thermo-poroelastic media, considering thermal conduction, convection, and fully thermoporoelastic coupled effect. The method is validated through examples and applicable for simulating crack propagation in cracked reservoirs where cold fluid injection is applied.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Chemistry, Physical
Dingyu Li, Chengwu Yang, Saravanan Rajendran, Jiaqian Qin, Xinyu Zhang
Summary: In this study, a highly efficient Ti3CN@TiO2/CdS photocatalyst was reported. Ti3CN@TiO2 materials with different morphologies were obtained from Ti3AlCN by controlling the etching time, and CdS nanoparticles were loaded onto the catalyst to improve its photocatalytic efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Dingyu Li, Yong Pang, Tao Lu, Zhongshuai Liu, Shiwei Chen
Summary: A novel temperature-dependent failure criterion of thermal shock fracture of ceramic materials was deduced based on the force-heat equivalence energy density principle. The thermal shock cracking behaviors of ceramic slabs under different thermal shock conditions were simulated using this failure criterion and the finite element method. The results showed good agreement between numerical simulation and experimental results, verifying the validity of the temperature-dependent failure criterion and proposing the dominant mechanism of thermal shock-induced fracture as the strain energy of tension.
FRONTIERS IN MATERIALS
(2022)
Article
Mechanics
Dingyu Li, Peidong Li, Weidong Li, Weiguo Li, Kun Zhou
Summary: A three-dimensional coupled thermo-mechanical phase-field model was developed to study thermal shock-induced fracture with consideration of temperature-dependent material properties. The model eliminated unexpected damage evolution and showed strong agreement with experimental results, revealing that tensile strain energy primarily controls thermal shock-induced cracking in ceramics.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Computer Science, Artificial Intelligence
Chen Han, Dingyu Li, Xuanyin Wang
Summary: Edge detection is a fundamental field in computer vision, and significant progress has been made with the combination of Convolutional Neural Network and Multi-Scale Representation of image. However, the large size and number of parameters of existing models make them difficult to apply in reality and result in resource wastage. In this paper, a modified light-weight architecture is proposed based on qualitative analysis of each part in the network and previous research. The new architecture, composed of residual-blocks, max-pooling layers, and batch normalization layers, outperforms previous models in memory, convergence, and computation efficiency while maintaining similar model size. It achieves better accuracy with smaller model size and surpasses the state-of-the-art results on the BSDS500 benchmark.
INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE
(2022)
Article
Engineering, Multidisciplinary
Dingyu Li, Zijian Ye, Jixiang Tang, Xuanyin Wang
Summary: This paper proposes a novel measurement system for accurately measuring the opening area of gas valves. The system uses top lighting and camera exposure to enhance the saliency of the valve opening, and applies subpixel location based on the rotating area effect to obtain precise edge position. The area computation is done based on the minimum circumscribed circle and the maximum inner circle of the edge.
Article
Oncology
Zih-Yin Lai, Ding-Yu Li, Chu-Yu Huang, Kai-Che Tung, Chung-Chi Yang, Hong-Ming Liu, Fong-In Chou, Yung-Jen Chuang
Summary: The study demonstrates that valproic acid (VPA) can act as a radiosensitizer in boron neutron capture therapy (BNCT) for melanoma, significantly inhibiting cell growth, exacerbating and disrupting DNA damage, and abolishing the cell cycle arrest caused by BNCT.
ANTICANCER RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Yumeng Liu, Ruzhuan Wang, Yu Wan, Shan Zhou, Hongwei Cai, Mingyu Gu, Dingyu Li, Weiguo Li
Summary: This study introduces the indentation size effect into a novel temperature-dependent hardness model using the energy method. The model accurately predicts the hardness of ceramic and metallic materials, and investigates the effects of indentation depth and Young's modulus on hardness and their evolution with temperature.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Engineering, Mechanical
Yu Wan, Ruzhuan Wang, Bi Jia, Shan Zhou, Yumeng Liu, Hongwei Cai, Mingyu Gu, Dingyu Li, Weiguo Li
Summary: This study considers the effect of particle/crack interaction on the high temperature fracture strength of materials and establishes corresponding models. The experimental results and model predictions are in good agreement, and it is found that particle/crack interaction has a significant weakening effect on the strength of materials.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Ruzhuan Wang, Dingyu Li, Weiguo Li
Summary: This study focuses on developing theoretical models to analyze the temperature dependence of hardness for high-temperature structural ceramics and their composites. The proposed models, based on basic material parameters, provide simple, cost-effective predictions with excellent agreement with experimental measurements, allowing for material design at any targeted temperature.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Mechanics
Dingyu Li, Ruzhuan Wang, Xiaorong Wang, Weiguo Li
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2020)
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)
