Article
Materials Science, Ceramics
Bo Wang, Delong Cai, Haoyi Wang, Wenhua Zou, Zhihua Yang, Xiaoming Duan, Peigang He, Daxin Li, Wenjiu Duan, Dechang Jia, Hua-Tay Lin, Chao Zhao, Yu Zhou
Summary: Boron carbide (B4C) ceramic composites with excellent mechanical properties were fabricated using B4C, silicon carbide (SiC), titanium boride (TiB2), and magnesium aluminum silicate (MAS) as raw materials. The influences of SiC and TiB2 content on the microstructural evolution and mechanical properties of the composites were investigated. MAS in the composites effectively removes oxide layers from ceramic particles during high temperature sintering. The toughening mechanism of the composites is mainly attributed to crack deflection along the grain boundary caused by thermal expansion mismatch between B4C and TiB2.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Ming Feng, Ya-qiao Wu, Guo-rong Ji, Yi Zhou, Xiao-jun Wang, Jian-ying Hao, Ya-qun Wu, Yu-ming Tian
Summary: This study investigates the sintering mechanisms of Corundum-mullite duplex ceramic (CMC) with different stoichiometric ratios and the addition of MnO2. The results show that the addition of MnO2 can promote the sintering reaction and lower the sintering temperature, providing beneficial guidance for industrial production of CMC at lower temperatures.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hao-Yang Wu, Ji Zou, Mirva Eriksson, Jing-Jing Liu, Wei-Min Wang, Zheng-Yi Fu
Summary: A novel approach to rapidly densify ceramic matrix composite was developed by combining ceramic and composite processing through spark plasma sintering. The newly formed particles from the conversion of ZrSi2 and resin were preferentially incorporated into the preform layer with randomly oriented fibers, enhancing the overall properties of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Jingbao Zhang, Guangchun Xiao, Mingdong Yi, Zhaoqiang Chen, Jingjie Zhang, Hui Chen, Xizuo Shang, Chonghai Xu
Summary: By adding ZrB2/SiC ceramic granules, the fracture toughness of the ceramic tool material was significantly improved, leading to better performance at high temperatures.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Composites
Zhenghao Tian, Xun Sun, Guihang Deng, Ru Jiang, Haitao Liu, Yunxin Liu
Summary: SiC fiber reinforced mullite matrix composites were prepared through a sol-gel process, with the sintering temperature significantly affecting the interfacial and mechanical properties. A specific mullite phase could be formed at 1200 degrees C, leading to increased Young's modulus and hardness of the matrix. The interfacial interaction between fiber and matrix was also enhanced with sintering temperature, impacting the macro-mechanical properties of the composites.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jingbao Zhang, Guangchun Xiao, Mingdong Yi, Zhaoqiang Chen, Jingjie Zhang, Hui Chen, Xizuo Shang, Chonghai Xu
Summary: The study showed that ZrB2/SiC/WC ceramic tool materials with a WC content of 5% exhibited the best comprehensive mechanical properties. As temperature increased, the materials' hardness and fracture toughness decreased gradually, while the flexural strength first increased and then decreased. Dry machining tests revealed that adhesive wear was the main form of wear for the ZrB2/SiC/WC ceramic tools.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Ceramics
Fuzhou Mao, Weiqiang Pi, Yuqi Li, Xu Xu, Ping Wen, Wei Zhou
Summary: Ti3AlC2 particles were introduced into mullite ceramics for the first time to improve their mechanical properties, resulting in significant enhancement in density and mechanical performance. The optimal mechanical properties were achieved in mullite-Ti3AlC2 composites with 15 wt% Ti3AlC2, showing significant improvements in bending strength, fracture toughness, and Vickers hardness compared to pure mullite ceramics.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Dazhao Liu, Guangyuan Zhang, Junfeng Hu, Kaixuan Gui, Miao Wang, Gang Wang, Wenbo Han, Jiahong Niu, Anzhe Wang
Summary: Mullite platelets were synthesized via molten salt method and used in the fabrication of layered mullite ceramic. The effects of calcination temperature on powder morphology and composition were investigated. The incorporation of mullite platelets in layered mullite ceramic resulted in high flexural strength and toughness. The layered structure improved the fracture toughness of mullite ceramic through various mechanisms.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Ruoyu Chen, Adam Bratten, Joshua Rittenhouse, Haiming Wen
Summary: The use of mechanically alloyed Al2O3-Y2O3 mixtures as sintering additives can promote liquid phase sintering of SiC, but prolonged ball milling time results in an excessive volume of complex oxide phases in the sintered specimens, negatively affecting the mechanical properties of SiC specimens.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Zihe Li, Zixuan Chang, Xinran Liu, Weimin Zhao, Xu Zhang, Shikang Xiao, Yuhang Tian, Aijun Li, Guifang Han, Jianzhang Li, Jingde Zhang
Summary: A novel composite additive system, Al(OH)(3)+Y2O3+CaF2, has been proposed to address the contradictory issue in the preparation of high strength and thermal shock resistant mullite-bonded porous SiC ceramics. Experimental results showed that the flexural strength of samples sintered in air can reach as high as 113 MPa, and the additives can effectively modify the size and shape of pores. This work provides a flexible strategy to control the mechanical performance and pore structure of low-cost porous SiC ceramics simultaneously.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xiong Gao, Deng Zhang, Xueru Feng, Jiamin Zhang, Yuqing Peng, Zhicheng Pan, Zongming Dai
Summary: The objective of this research is to synthesize mullite from associated rare-earth kaolin and investigate the effects of particle size and sintering temperature on its phase composition, microstructure, and mechanical properties. The results indicated that using 400-mesh associated rare earth kaolin can improve the properties of mullite, such as aspect ratio, density, hardness, and strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Mahmoud F. Zawrah, Ahmed R. Wassel, Rasha A. Youness, Mohammed A. Taha
Summary: Improper disposal of industrial wastes causes environmental pollution. Recycling these wastes for new product fabrication has become an interesting research topic. This study prepared sintered mullite-containing ceramics from aluminum dross and silica fume waste materials. The amount of mullite phase increased with higher sintering temperature and silica fume content, while apparent porosity and bulk density decreased. Moreover, increasing mullite content led to decreased microhardness, compressive strength, Young's modulus, and electrical conductivity, but improved fracture toughness.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Tongshuang Guo, Zhenglong Liu, Chao Yu, Jun Ding, Puliang Yu, Chengji Deng
Summary: This study investigated the effect of pore size on the properties of porous SiC-Mullite ceramics. It was found that increasing the pore size decreased the cold modulus of rupture and cold crushing strength while increasing thermal conductivity. Pores smaller than 5 μm helped enhance strength and decrease thermal conductivity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Lang Lin, Hengchang Wang, Chenhe Xia, Jie Xu, Xuanyu Meng, Runwu Yang, Guoxin Hu, Yanan Qu, Feng Gao
Summary: Excessive sintering shrinkage can cause deformation and cracking in porous ceramics, affecting their microstructure and properties. This study aimed to prepare low-shrinkage porous mullite ceramics using foam-gelcasting with kyanite and aluminum fluoride as additives. The inclusion of AlF3 reduced sintering shrinkage, increased porosity, and resulted in the formation of mullite whiskers. The ceramics with 30 wt% AlF3 exhibited the lowest shrinkage (3.5%), highest porosity (85.2%), compressive strength of 3.06 +/- 0.51 MPa, and thermal conductivity of 0.23 W/(m center dot K) at room temperature. The low sintering shrinkage process reduced processing costs and is significant for the preparation of high-performance porous ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Rosa Maria da Rocha, Christian Frederico Von Dollinger, Francisco Cristovao Lourenco de Melo, Frank Ferrer Sene, Miriam Kasumi Hwang Yassuda
Summary: This study aimed to obtain a multiphase composite of (Zr,Ti)B2-SiC through pressureless sintering. The addition of TiO2 affected solid solution formation, densification, microstructure, and mechanical properties. 2.0 wt% TiO2 was added to ZrB2-SiC composites with 10-30 vol% SiC and sintered at 2050 degrees C. The composites doped with TiO2 exhibited improved fracture toughness but slightly lower Vickers hardness compared to composites without TiO2 addition.
CERAMICS INTERNATIONAL
(2023)
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)