Article
Polymer Science
Wenjing Kong, Jiaqi Sun, Muyao Gao, Tianhao Li, Ming Liu, Yujie Song
Summary: In this article, boron element was incorporated into phthalonitrile resins to improve their processibility and thermal stability. The modified resins showed lower melting points and better thermal stability, with stable mechanical properties over a wide temperature range, which is crucial in harsh environments.
Article
Engineering, Multidisciplinary
Xinming Xu, Xingang Luan, Jiahao Zhang, Xinxin Cao, Donglin Zhao, Laifei Cheng, Ralf Riedel
Summary: Advanced C/SiC-SiHfBCN composites were prepared by modifying the matrix of C/SiC composites with SiHfBCN ceramics derived from a single-source precursor. The ultra-high temperature oxidation behavior of the composites under laser heating was systematically investigated, and the influence of temperature, preform structure, and precursor on their oxidation resistance was analyzed. The results showed that the preform structure and precursor affected the oxidation behavior of the C/SiC-SiHfBCN composites by altering their thermal conductivity in the thickness direction. The Hf-containing oxide layer formed during ultra-high temperature oxidation effectively protected the internal carbon fibers from oxidation. The C/SiC-SiHfBCN composites exhibited significantly reduced linear ablation rate compared to other reported C/SiC composites, indicating enhanced ablation resistance.
COMPOSITES PART B-ENGINEERING
(2023)
Review
Polymer Science
Yin Lu, Xinye Yu, Lu Han, Kan Zhang
Summary: This article reviews the recent development of high-performance thermosets based on norbornene functional benzoxazine thermosetting resins, highlighting the efforts of researchers in improving the properties of polybenzoxiazines.
Article
Chemistry, Multidisciplinary
Guoqiang Qin, Shilun Jiang, Haotian Zhang, Shengjian Qin, Hongya Wu, Feipeng Zhang, Guanglei Zhang
Summary: This paper investigated the effect of curing temperature on the properties of PBO aerogel. It was found that higher curing temperature resulted in improved mechanical properties, but excessively high temperature led to a significant decrease in pore volume and specific surface area. The F-type PBO aerogels showed excellent properties and can be used in aerospace applications or other fields.
Article
Materials Science, Ceramics
Ju Yinchao, Liu Xiaoyong, Wang Qin, Zhang Weigang, Wei Xi
Summary: Ultra-high temperature composite ceramic matrix composites were fabricated and their ablation behaviors were investigated. The study found that the composites formed a solid-liquid two-phase dense oxide film after ablation, which greatly improved their ablation performance. These findings have instructional significance for the design and application of ultra-high temperature ceramic matrix composites.
JOURNAL OF INORGANIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
B. Baker, V. Venkatachalam, L. Zoli, A. Vinci, S. Failla, D. Sciti, J. Binner
Summary: During oxyacetylene torch testing on C-f/ZrB2-SiC-Y2O3 composites at various angles of attack, it was found that lower surface temperatures at oblique angles led to less damage in terms of oxidation extent and material removal. The study also showed a significant drop in pressure and increase in shear stress at more oblique angles of attack, affecting the surface oxide formation and susceptibility to damage.
MATERIALS & DESIGN
(2021)
Review
Materials Science, Ceramics
Dewei Ni, Yuan Cheng, Jiaping Zhang, Ji-Xuan Liu, Ji Zou, Bowen Chen, Haoyang Wu, Hejun Li, Shaoming Dong, Jiecai Han, Xinghong Zhang, Qiangang Fu, Guo-Jun Zhang
Summary: Ultra-high temperature ceramics (UHTCs) have ultra-high melting points, outstanding mechanical properties, and ablation resistance at elevated temperatures, making them promising materials for structural applications in extreme environments such as rockets and hypersonic vehicles. The development of high-entropy UHTCs is an emerging direction for ultra-high temperature materials.
JOURNAL OF ADVANCED CERAMICS
(2022)
Review
Polymer Science
Jingkai Liu, Shuaipeng Wang, Yunyan Peng, Jin Zhu, Weiwei Zhao, Xiaoqing Liu
Summary: The development of sustainable thermosetting resins is a contemporary research objective, requiring renewable feedstocks, comprehensive properties, and recyclability. This systematic overview discusses recent advances in bio-based thermosetting resins, including the application of bio-based platform compounds, synthesis of typical bio-based thermosets, and strategies for recycling waste products.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Fuxing Yao, Wenge Chen, Yana Yang, Longlong Dong, Ahmed Elmarakbi, Yong-Qing Fu
Summary: Tungsten network reinforced functionally graded copper composites were prepared using an integrated 3D printing and infiltration technology to improve high temperature ablation properties of nuclear fusion divertor materials. The composites' ablation behavior was systematically investigated using an argon arc welding torch. Results showed that mass loss of composites was increased firstly but then decreased with the increase of ablation time. During ablation, evaporation of the melted copper reduces the local temperature of tungsten skeleton, whose high melting point also restrict the further evaporation of copper. These mechanisms significantly improve the ablative resistance of CuW gradient composite. Tungsten twinning structures were identified to form during ultra-high temperature (at 6273.15 K) ablation process in a cold environment in air. The formation of distinctive W twinning structures and gradient distribution of copper and tungsten skeleton were identified as the key mechanisms for the significantly enhanced ablation performance of the graded composite.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Mingyong Y. Wang, Handong D. Jiao, Zhenghao H. Pu, Biao Hong, Jianbang B. Ge, Wei Xiao, Shuqiang Q. Jiao
Summary: Recently, ultra-high temperature electrochemistry (UTE) has emerged, aiming to extend the temperature limit of human technology in electrochemical engineering, with far-reaching impact on metal extraction and oxygen production in deep-space exploration. The Review analyzes the physicochemical properties of molten oxides, discusses the design principles for inert anodes, and highlights the applications of liquid metal cathodes in titanium extraction and iron/steel production. The emphasis on key challenges and perspectives provides valuable inspiration for the rapid advancement of UTE.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Ceramics
Rui-qiang Wang, Nan Wang, Shi-zhen Zhu, Yan-bo Liu, Zhuang Ma
Summary: ZrB2-SiC (ZS) and ZrB2-SiC-TaSi2 (ZST) ultra-high temperature ceramics coatings were prepared on the surfaces of C/C composites to improve their high-temperature oxidation resistance. The ablation behaviors of the coatings were evaluated at different temperatures, and it was found that the ZS coatings had good resistance at 1800 °C but failed rapidly at 2000 °C, whereas the ZST coating always performed well even at 2000 °C. The enhancement of high temperature ablation resistance was attributed to the introduction of TaSi2, which improved the coating's density, reduced volatilization of the glassy phase, and enabled the formation of a dense oxide layer.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Shenglan Liu, Yishu Yan, Yinxiang Xu, Chao Yang, Yiqun Fan, Junbo Xu
Summary: The stiffness of phenolic resins is affected by methylene bridges and branched phenolic rings. Introducing naphthols does not significantly improve stiffness due to the counterbalance between nonbonded energies and the decrease in methylene bridges. In the case of cyanate ester modified phenolic resins (CEPF), chain-to-chain bridges of triazine rings increase the Young's modulus and contribute more to stiffness compared to rigid naphthols. The trend from plastic to cured state can be observed in the mean squared displacement and Young's modulus. These findings support the molecular design of phenolic resins to optimize stiffness.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Hong Zhang, Li-An Zhu, Shu-Xin Bai, Yi-Cong Ye
Summary: An iridium/rhenium (Ir/Re) double-layer coating was prepared on carbon/carbon (C/C) composites, and its morphologies, bond strengths, and ablation resistance were studied. The results demonstrate that the rhenium interlayer significantly enhances the bond strength between the iridium coating and C/C substrate, and the Ir/Re coating exhibits excellent ablation resistance throughout the high-temperature ablation process.
Article
Materials Science, Multidisciplinary
Yong Lu, Qizheng Li, Zhicheng Zhang, Xiao Hu
Summary: In this study, two magnolol-based polymers were designed and synthesized for high-performance polymer dielectrics. The polymers showed excellent thermal, mechanical, and dielectric properties, making them promising materials for energy storage.
MATERIALS & DESIGN
(2022)
Article
Polymer Science
Lin Xie, Rui Yang, Nan Li, Pablo Froimowicz, Kan Zhang
Summary: In this study, two novel triptycene-based dioxazine benzoxazine monomers were synthesized and a thermoresponsive benzoxazine copolymer was successfully prepared. The resulting materials exhibited outstanding thermal stability and flame retardant properties, suggesting their potential application in advanced materials design.
