Article
Multidisciplinary Sciences
Ali Razmjoo, Hamid Reza Baharvandi, Nasser Ehsani
Summary: The mechanical properties of pressureless sintered samples of alpha-SiC based composite containing graphene and nano beta-SiC were investigated. The usage of nano beta-SiC and graphene led to the elongation of alpha-SiC grains, resulting in improved mechanical properties. The combination of 5 wt.% nano beta-SiC and 1 wt.% graphene showed the highest density, modulus, and fracture toughness.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
J. Braun, C. Sauder, F. Rouillard, F. Balbaud-Celerier
Summary: SiC/SiC composites show good corrosion resistance and mechanical properties in liquid sodium, especially with an increase in strength observed for undamaged samples after exposure. Liquid sodium can heal microcracks generated during the manufacturing process.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Takashi Nozawa, Takaaki Koyanagi, Yutai Katoh, Hiroyasu Tanigawa
Summary: Understanding the statistical properties of mechanical properties in non-irradiated and neutron-irradiated SiC/SiC composites is crucial for component design. This study evaluated the damage accumulation behavior of composites, focusing on fracture parameters such as proportional limit stress and acoustic emission onset stress. The study used underwater acoustic emission technique and conducted four-point flexural tests to evaluate the post-irradiation strength of two types of SiC/SiC composites. The results showed that the reliability of composites is crucial for expanding design margin and utilizing a probabilistic design approach.
JOURNAL OF NUCLEAR MATERIALS
(2022)
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
Chemistry, Physical
Guang-Yuan Cui, Rui-Ying Luo, Lian-Yi Wang, Peng Huang, Jia-Qi Song, Jin-Sen Wang
Summary: In this study, the mechanical properties of SiCf/SiC composites with a BN/SiC multilayer interface after oxidation at different temperatures were evaluated. The results showed significant temperature-dependent strength degradation and different degradation mechanisms for the oxidized composites. The deterioration of mechanical properties at higher temperatures was attributed to weak interface bonding causing fiber breakage hysteresis.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Manufacturing
Zhigang Dong, Haitao Zhang, Yan Bao, Feng Yang, Zhongwang Wang, Renke Kang
Summary: In order to reveal the material removal mechanism of SiCf/SiC composites during UVHG, a hole-making experiment was conducted and the contact behavior between a grain and different components in SiCf/SiC was analyzed. Evaluation indexes of hole wall quality (C-w) and hole exit quality (C-e) were proposed. The results showed that the periodic changes of fiber cutting angle led to different fracture mechanisms and surface topography. The quality evaluation indexes C-w and C-e were found to be highly reliable. Experimental parameters like pitch, feed rate, and ultrasonic amplitude significantly influenced the hole-making quality.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Materials Science, Ceramics
Yumin An, Kun Wan, Yi Yang, Yongna Jia, Yehong Cheng
Summary: In this study, biomimetic Cf/ZrB2-SiC ceramic composites with bouligand structures were successfully fabricated by combining precursor impregnation, coating, helical assembly, and hot-pressing sintering. Analysis of the microstructures and carbon fiber content revealed that the coated ceramic layer can heal cracks and improve the mechanical properties, while the mechanical properties can be tuned by the carbon fiber content. This research is of great importance for the development of biomimetic ceramic composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Jinxue Ding, Xiaokang Ma, Xiaomeng Fan, Jimei Xue, Fang Ye, Laifei Cheng
Summary: The study investigated the microstructure, failure behavior, and interfacial properties of SiCf/BN/SiC and C-f/PyC/SiC composites using the fiber push-in test. The findings showed differences in the mechanical response of the interfacial domain, with SiCf/BN/SiC experiencing interface debonding accompanied by interphase fracture, while C-f/PyC/SiC exhibited interface debonding along with interphase lateral slipping without any interphase fracture. The calculated interfacial shear stress indicated that C-f/PyC/SiC had a weaker interfacial domain compared to SiCf/BN/SiC.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Rida Zhao, Chenglong Hu, Yuanhong Wang, Shengyang Pang, Jian Li, Sufang Tang, Hui-Ming Cheng
Summary: Sandwich-structured C/C-SiC and C/C-SiC-ZrC composites with or without a SiC interphase were fabricated using a joint process of ECVI and PIP. The composites exhibited low density, high strength, and low ablation rate, with the interphase and matrix constituents playing a significant role in their mechanical and ablation properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Keijiro Yoshimura, Kazunori Nakano, Takeshi Nishiwaki, Yuki Iwama, Masanobu Murata
Summary: This study developed strain sensor materials with electrical resistivities changing with strain by producing Ketjenblack/silicone-rubber composites with gradually changing pore sizes. The results showed that the resistivities of the graded porous composites decreased more significantly at high compression rates, making them promising strain sensor materials. The changes in resistivity were attributed to a gradual increase in size of the area with low resistivity, indicating the potential for use under high compression rates.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
Dongyun Zhang, Denghao Yi, Xuping Wu, Zhiyuan Liu, Weidong Wang, Reinhart Poprawe, Johannes Henrich Schleifenbaumc, Stephan Zieglerd
Summary: In this study, a 10 wt% SiC-reinforced AlSi10Mg-based composites were prepared by selective laser melting (SLM) process. It was found that higher laser linear energy density promoted in-situ reaction between SiC particles and Al melt, resulting in the formation of Al4SiC4 phase. This led to improved mechanical properties and uniform distribution of SiC particles and Al4SiC4 phase in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Composites
Kun Hui, Le Wang, Zixuan Lei, Jian Yang, Hongjian Qu, Jiang Li, Ning Yan
Summary: This study investigated the reinforcing and synergistic effects of silicon carbide (SiC) nanowhiskers and nanopowders on thermal protection materials (TPMs). The results showed that both SiC nanowhiskers and nanopowders improved the thermal stability and conductivity of the TPMs. The best performance was achieved with a formulation containing equal parts of SiC nanowhiskers and nanopowders, reducing the ablation rate and increasing the back temperature. The study also found that SiC nanofillers strengthened the char layer, improving the ablation resistance and thermal conductivity of the composites.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Materials Science, Ceramics
Hao Luo, Rui-Ying Luo, Lian-Yi Wang, Peng Huang, Guang-Yuan Cui, Jia-Qi Song
Summary: SiC/SiC composites prepared through precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI) exhibit different microstructures and mechanical properties. PIP composites showed cracks and amorphous crystal structure, while CVI composites had tightly bonded matrix without cracks and high crystallinity. After heat treatment, PIP composites experienced significant decrease in bending strength and modulus, while CVI composites maintained good mechanical properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jingbo Zhu, Yangwei Wang, Chonggao Bao, Bingheng Lu
Summary: This study fabricated co-continuous SiC/Al composites with oxidized 3D-SiC preforms and pure aluminum using vacuum-pressure infiltration technique. The results showed an improvement in the interfacial structure between Al and oxidized SiC preforms due to the continuous interfacial reaction layer. This layer, mainly composed of Al2O3, enhanced the compressive strength and three-point bending strength of the composites. Additionally, Si atom segregation and dissolution in the Al phase near the interface were observed, potentially leading to the formation of stacking faults.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Xinjian Zhang, Hanlin Wang, Xudong Zhao, Bo Cheng, Wensheng Li, Qiang Song, Uladzimir Seniuts, Marat Belotsrkovsky
Summary: The Magnetic Abrasive Finishing (MAF) technology has shown potential for precision machining, but the current methods for preparing Magnetic Abrasive Particles (MAPs) have issues. This paper proposes a two-step ball milling method to address these problems and produce MAPs with uniform core-shell structure. The study found that the addition of nanoscale iron powder and the sintering process improved the magnetic properties of the MAPs.
MATERIALS TODAY COMMUNICATIONS
(2023)