Article
Construction & Building Technology
Amir Hossein Mahmoud Hosseiny, Abolhassan Najafi, Gholamreza Khalaj
Summary: This research studied the effect of the CaO/MgO ratio on the transformations and formation of phases during fast firing of ceramic tiles. The weight percentage of the Anorthite phase increased with the decrease in the CaO/MgO ratio, while the thermal expansion coefficient decreased. Microstructural studies showed that the Gehlenite phase was removed and the Anorthite phase was increased by fine-graining the primary sources.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Ceramics
De Lu, Hongjie Wang, Lei Su, Min Niu, Pengfei Guo, Hongfei Gao, Lei Zhuang, Zhixin Cai, Liang Xu
Summary: In this study, a highly porous and ultra-strong SiC nanowires network was successfully fabricated, displaying high compressive stress and resilience, excellent high-temperature stability and low thermal conductivity, making it a promising candidate for thermal insulators and mechanical energy storage in harsh environments.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
J. L. Amoros, E. Blasco, A. Moreno, C. Feliu
Summary: This study investigated the thermal treatment of industrial spray-dried porcelain stoneware compacts, and found that the physical properties and phase content of the porcelain were independent of the thermal treatment.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Aitana Tamayo, Ma Angeles Rodriguez, Fausto Rubio, Juan Rubio
Summary: Researchers have found that CDCs prepared at 700 and 800 degrees Celsius are dominated by linear graphitic domains and barrel-like structures. These barrel-like structures provide increased specific capacitance, but the high anisotropy of the structure compromises the energy density.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Stefan Csaki, Frantisek Lukac, Jakub Veverka, Tomas Chraska
Summary: Ti3SiC2 MAX phase material was successfully prepared using spark plasma sintering, and the effects of atmosphere, dwell time, and SiC grain size on the material properties were studied. The results showed that the maximum MAX phase content of 90 wt% was achieved at a sintering temperature of 1550°C, with low porosity and high hardness.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Pingyi Zhou, Xin Qiu, Zhongtao Luo, Xinhong Liu, Shaowei Zhang, Quanli Jia
Summary: In this study, ASC castables were prepared using different materials and the microstructure, firing atmosphere, and effects of silicon powder addition were analyzed. The results showed that the addition of silicon powder significantly improved the strength and strain tolerance of ASC castables, but slightly decreased their thermal shock resistance. Firing in reducing atmosphere improved the cold strength and thermal shock resistance of the samples, while the hot strength was minimally affected by pretreatment conditions. The differences in properties were closely related to the phase composition and microstructure of ASC castables in different firing atmospheres. The growth process of SiC whiskers was also discussed in detail.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jing Zhao, Xiaoqi Ban, Yifan Yang, Zhigang Yuan, Hongqiang Ru, Desheng Su
Summary: Hierarchically porous SiC ceramics with tunable, uniform, and bimodal pore structures were prepared using the foaming method. The formation mechanisms of the 1st and 2nd modal macropores were identified as the H2O2 foaming process and SiC particle overlap, respectively. The effect of pore-foaming agent amount, foaming temperature, and surfactant on the ceramic properties were investigated. The results showed that the porosity, pore size, and interconnectivity of the 1st modal pores increased with increasing H2O2 amount, while bulk density and strength decreased. The porosity increased and strength decreased with higher foaming temperature. Surfactants improved pore interconnectivity and porosity. At a foaming temperature of 85 degrees C and 5 wt.% H2O2 addition, the SiC porous ceramics exhibited a porosity of 56.32%, bulk density of 2.8301 g/cm(3), flexural strength of 11.94 MPa, and compressive strength of 24.32 MPa. Moreover, the ceramics showed excellent corrosion resistance to acids and alkalis.
Article
Materials Science, Ceramics
Jinzhu Zou, Huiwen Xiong, Yujuan Huang, Zhiguo Wang, Jianhui Wen, Wen Du, Jun Cao
Summary: The pore characteristics and macroscopical performance of porous ceramics can be controlled by adjusting the freeze casting parameters. Different parameters have significant effects on the microstructure and compressive strength of porous SiC. Increasing PCS content, freeze temperature, freeze front velocity, or temperature gradient can improve the performance of porous SiC, with increased freeze front velocity showing a more efficient way to enhance compressive strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yubo Yang, Yu Zhao, Hui Mei, Chao Chen, Laifei Cheng
Summary: This study prepared 3DN C/SiC composites with controllable porosities by depositing different thicknesses of SiC, and investigated the effect of porosity on the lubrication performance and wear rate of the composites. Samples with 30% porosity showed the best lubrication performance under a 10N load.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Stefan Csaki, Frantisek Lukac, Tomas Hulan, Jakub Veverka, Michal Knapek
Summary: In the preparation of anorthite ceramics using the SPS technique, it was found that the transformation from gehlenite and Ca-feldspar to anorthite occurred as the temperature increased, resulting in higher anorthite content and lower porosity in the samples prepared by SPS compared to the reference sample.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Shynar Kultayeva, Young-Wook Kim, In-Hyuck Song
Summary: The study found that doping significantly affects the properties of porous SiC ceramics, with electrical resistivity strongly influenced by doping while thermal and mechanical properties primarily dependent on the necking area between grains. Results show that the electrical conductivity of porous SiC ceramics can be successfully tuned independently of the thermal conductivity through suitable doping.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Wenyan Huang, Yufeng Wang, Zhonghao Ning, Shengjian Mao, Zhichao Xue, Yeqi Zhu, Qianwen Tao, Siqi Lan, Rongqian Yao
Summary: An ingenious strategy is reported to produce lightweight SiC composite ceramics with good load-bearing and remarkable surficial antioxidant capacity by reactively repyrolyzing flexible polymolybdenumcarbosilane-vinyltriethoxysilane-graphene oxide fillers blends. Highly cross-linked precursors connect up to five polycarbosilane to optimize their formability. In-situ formed MoSi2 and Mo4.8Si3C0.6 effectively strengthen interface bonding, promote crack formation, and hinder grain growth. The use of in-situ SiC nanowires by a Mo-containing catalyst further reinforces the ceramic network and improves the mechanical properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Composites
Roman Shishkin, Yuliy Yuferov
Summary: The microstructure of SiC matrix composite materials produced by pressureless aluminum melt infiltration at 950 degrees Celsius was investigated. It was found that there are different areas formed during the direct infiltration of aluminum into sintered SiC preform, leading to improved density and hardness of the infiltrated composite material, making it a prospective wear resistant lining.
COMPOSITES COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Decai Lu, Su Cheng, Laizhen Jin, Liwei Zhang, Dequan Shi, Hongyan Yue, Tao Zeng
Summary: The SiCW/SiC composites were prepared using selective laser sintering (SLS) technology, and the influence of sintering temperature on the growth of SiCW/SiC whiskers was investigated. A relationship model between the number of whiskers and temperature was established based on the classical diffusion theory. The model, which has an accuracy of over 93%, can also be applied to other 3D printing in-situ whisker toughening systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Shalini Rajpoot, Jang-Hoon Ha, Young-Wook Kim
Summary: The mechanical, thermal, and electrical properties of porous SiC ceramics can be independently tuned by selecting the appropriate starting particle size and sintering atmosphere. In the porosity range of 40% to 54%, the compressive strength and thermal conductivity of porous SiC ceramics increased as the porosity increased, contrary to the general trend. Additionally, the electrical conductivity of porous SiC ceramics sintered in N-2 atmosphere was significantly higher compared to those sintered in Ar atmosphere due to N doping in the PCS-derived beta-SiC.
CERAMICS INTERNATIONAL
(2021)
