Article
Materials Science, Ceramics
Teng Yu, Heejin Kwon, Linkun Shi, Xiaobing Zhou, Dang-Hyok Yoon, Peter Tatarko, Xin Xu, Zhengren Huang, Qing Huang
Summary: Monolithic SiC was successfully joined using a SiC whisker-reinforced Ti3SiC2 composite filler via electric field-assisted sintering technique, achieving a joint strength higher than 250 MPa. Optimization of process parameters and the addition of up to 15 wt. % SiC whiskers improved joint strength, but a lower joint strength was observed with 20 wt. % SiC whisker addition due to thermal expansion mismatch.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Gang Wang, Yihe Liu, Miao Wang, Yunlong Yang, Yu Zhao, Rujie He, Caiwang Tan, Wei Wang, Xiaobing Zhou
Summary: Electric field-assisted sintering technology (FAST) was used to join SiC ceramic with a CoFeCrNiCu high-entropy alloy filler, and a thin Ti film was deposited on the SiC surface to reduce thermal stress. The microstructure, bending strength, and bonding mechanism were systematically investigated. It was found that a discontinuous TiC layer was formed at the interface, and the interfacial reaction products varied with different brazing temperatures. A joint with a bending strength of 72 MPa was achieved at 1200 degrees C, 73% higher than that of the SiC brazed without Ti coating. This work provides new insights in the design of ceramic brazing with high mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Xiaobing Zhou, Teng Yu, Jie Xu, Yang Li, Zhengren Huang, Qing Huang
Summary: A novel layered structure material, Pr3Si2C2, was successfully synthesized using a molten salt approach, and used as a joining filler for carbon fibers reinforced SiC composites. A near-seamless joint was achieved by the newly precipitated SiC grains, which were well densified with the Cf/SiC matrix. The formation of near-seamless joint eliminates the thermal mismatch issues.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Yihe Liu, Gang Wang, Yu Zhao, Miao Wang, Rujie He, Caiwang Tan, Wei Wang, Xiaobing Zhou
Summary: SiC ceramics were successfully brazed at lower temperatures using CoFeCrNiCuTi high-entropy alloy and electric field-assisted sintering technology. The inter-diffusion between the filler and ceramics was improved due to the high-entropy effect and the accelerated diffusion of elements. This approach provides a new and efficient filler system for ceramic brazing.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Teng Yu, Jie Xu, Xiaobing Zhou, Peter Tatarko, Yang Li, Zhengren Huang, Qing Huang
Summary: Y3Si2C2 material was synthesized at a low temperature and used as a joining material for C-f/SiC composites, resulting in near-seamless joints using an electric field-assisted sintering technique.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Ceramics
Lin-Kun Shi, Xiaobing Zhou, Kai Xu, Keke Chang, Jian-Qing Dai, Zhengren Huang, Qing Huang
Summary: The study successfully achieved seamless joining of monolithic SiC at a low temperature using electric field-assisted sintering technology, with Yb coating on SiC forming Yb3Si2C2 to create almost completely seamless joints. The high bending strength of the joints indicates a sound connection, potentially useful for SiC-based composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Min Wei, Haizhou Wang, Liwu Jiang, Lei Zhao, Lixia Yang, Xuebin Chen
Summary: Spark plasma sintering technology was used to prepare SiC-Al2O3 composite absorbers with different compositions, and the effects of composition, heating time, and microwave power on their heating characteristics were analyzed. It was found that increasing the microwave power led to higher temperature achieved by the absorbers, and the absorbers with different Al2O3 content had different heating temperatures. These findings are important for precise temperature control in microwave heating of composite absorbers.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Thomas Herisson de Beauvoir, Elise Benard, Geoffroy Chevallier, Claude Estournes
Summary: This study prepared yttria stabilized zirconia ceramics using Flash-SPS at different temperatures and analyzed the influence of sintering temperature on microstructure. The results showed that the maximum densification rate was achieved at 1600 degrees C and decreased with increasing sintering temperature. The presence of a thermal gradient in the samples also resulted in heterogeneity in grain size and morphology.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jie Xu, Xiaobing Zhou, Shunrui Zou, Lu Chen, Peter Tatarko, Jian-Qing Dai, Zhengren Huang, Qing Huang
Summary: In this study, a novel Pr3Si2C2 additive was prepared and successfully applied in the liquid-phase sintering of SiC ceramics. It was found that an appropriate amount of additive could improve the sintering rate and thermal conductivity of SiC, while excessive additive could decrease the thermal conductivity due to increased interfacial thermal resistance. SiC materials with optimized amount of additive and grain boundary structure exhibited the highest thermal conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
R. W. Harrison, J. Morgan, J. Buckley, S. Bostanchi, C. Green, R. White, D. Pearmain, T. Abram, D. T. Goddard, N. J. Barron
Summary: In this study, cerium dioxide was densified using conventional and field-assisted sintering techniques. The effects of various sintering parameters on the microstructure of the ceramics, including temperature, hold time, atmosphere, electric field strength, and polarity, were examined.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Wolfgang Rheinheimer, Xin Li Phuah, Lukas Porz, Michael Scherer, Jaehun Cho, Haiyan Wang
Summary: Flash sintering of SrTiO3 is characterized by high heating rates, resulting in increased dislocation density and plasticity, which facilitates the densification of ceramic powder compacts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Jie Xu, Peter Tatarko, Lianghao Chen, Xu Shan, Qing Huang, Xiaobing Zhou
Summary: High-strength SiC joints were successfully obtained using a Pr coating as the initial joining filler and electric current field-assisted sintering technique at a low temperature of 1400 degrees C. The formation of a Pr3Si2C2 transient phase and a liquid phase between Pr3Si2C2 and SiC promoted atomic diffusion at the interface and improved consolidation, resulting in partially seamless SiC joints. The bending strength of the joints increased with the decrease in joining layer thickness, reaching a value of 227 +/- 12 MPa with a 100 nm Pr coating at 1400 degrees C.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Alexandre Margueret, Luca Balice, Karin Popa, Michael Holzhaeuser, Emanuele De Bona, Walter Bonani, Antonio Bulgheroni, Fabienne Audubert, Marco Cologna
Summary: We analyzed the densification of UO2 nanopowders in SPS under different conditions and found that the apparent activation energy of densification in SPS is smaller than that in conventional sintering. We also observed a threshold stress for the transition from pressure-insensitive sintering to pressure-assisted sintering.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Subhadip Bhandari, Tarini Prasad Mishra, Olivier Guillon, Devinder Yadav, Martin Bram
Summary: Flash sintering is a novel technique that densifies ceramics at moderate furnace temperature and in short time. The mechanism behind flash sintering is not fully understood, but this study experimentally demonstrated that it is primarily dominated by Joule heating.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Ceramics
Milad Kermani, Jinghua Wu, Zexiao Liu, Fei Zuo, Hua-Tay Lin, Chunfeng Hu, Salvatore Grasso
Summary: This study examines the impact of sintering thermal history on the kinetics of grain growth for alumina doped with magnesium oxide. The results show that a high heating rate during sintering inhibits the grain growth rate, while a slow heating rate increases the grain growth constant. The enrichment of magnesium at grain boundaries, favored by short sintering duration, is considered one of the factors contributing to the slowed grain growth rate. Moreover, it is suggested that rapid heating, along with limited grain coarsening driven by surface diffusion and a reduced migration rate of grain boundaries, facilitates the fabrication of translucent alumina without the need for a vacuum or hydrogen atmosphere.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
