Article
Materials Science, Ceramics
Xin Zhang, Qinchuan He, Mingcong Qing, Jie Feng, Zhanpeng Liu, Yiqun Wang, Xuemin Yin
Summary: La2O3 modified C/C-ZrC composites were successfully prepared by precursor infiltration and pyrolysis technique. The ablation resistance of the composites was tested at 1700 and 2400 degrees C in plasma flame. At 2400 degrees C, La2O3 promoted the liquid phase sintering of ZrO2, forming a protective La-Zr-O molten layer. At 1700 degrees C, La2O3 promoted the solid phase sintering of ZrO2, forming an intact La-Zr-O particle-stacked layer, which positively protected the composites.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Xinfa Tian, Xiaohong Shi, Li Yang, Hejun Li, Hongjiao Lin
Summary: The modified precursor infiltration pyrolysis (PIP) method was used to prepare an integrated doped ceramic matrix and coating with SiC nanowires, resulting in a composite with improved bonding strength and ablation resistance. The integration of the coating and matrix enabled the formation of a continuous oxide layer in the ablation process, effectively blocking oxygen and heat. This systematic improvement led to significantly lower mass and linear ablation rates compared to traditional composites.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jia Sun, Yuqi Wang, Yuyu Zhang, Lingxiang Guo, Bing Liu, Pei Zhang, Zhaoju Yu
Summary: By using precursor infiltration and pyrolysis, SiC(N)/TiC ceramics derived from single-source precursors were introduced into C/C composites, significantly improving the shear strength. After annealing, the ceramics transformed into SiC(N)/TiC-NCs nanocomposites, further enhancing the shear strength.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Xinfa Tian, Li Yang, Bo Li, Hejun Li, Xiaohong Shi, Hongjiao Lin
Summary: A novel method for preparing a coating on C/C composite is discussed in this study. By adding SiC nanowires, the method achieves the integration between the coating and the matrix, improving the adhesion of the coating. The results demonstrate that the material with a ZrC/SiC precursor ratio of 5:1 exhibits the highest resistance to ablation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Yuanqi Weng, Xin Yang, Feixiong Chen, Cunqian Fang, Xiaxiang Zhang, Anhong Shi, Qizhong Huang
Summary: A rapid method combining precursor infiltration and pyrolysis with pressure assisted reactive melt infiltration was developed to fabricate C/C-ZrC-SiC-CuxSiy composites with low open porosity. The dominant phases of ZrC and SiC with scattered CuxSiy inclusions were present in the continuous infiltrated matrix. In ablation test, the heat absorbing effect of CuxSiy-phase and formation of protective ZrO2-SiO2 cover enhanced the ablative property of composites for short-time ablation, while the massive consumption of Si-phase damaged the surface oxide cover integrity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yan Jia, Yong Li, Haifeng Cheng, Si'an Chen
Summary: In this study, the matrices of C/C-ZrC composites were modified by slurry infiltration to improve their density and properties. Different slurry powders were used to densify the composites. The density of the composites increased, while the porosity decreased after infiltration. The ablation and mechanical properties of the composites improved significantly by matrix modification.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhigang Zhao, Kezhi Li, Gang Kou, Wei Li
Summary: The cyclic and single ablation behaviors of C/C-ZrC-SiC and C/C-ZrC composites prepared by reactive melt infiltration were studied. It was found that the C/C-ZrC-SiC composites showed better ablation resistance under cyclic ablation mode compared to C/C-ZrC composites. The formation of an effective heat/oxygen protection layer on the ablated surface contributed to the desirable ablation resistance of C/C-ZrC-SiC composites during single ablation.
Article
Materials Science, Multidisciplinary
Zhigang Zhao, Kezhi Li, Gang Kou, Wei Li
Summary: The cyclic and single ablation behavior of C/C-ZrC-SiC and C/C-ZrC composites, prepared by reactive melt infiltration, were investigated. It was found that the increased cyclic ablation numbers aggravated the oxidation of the matrix and the peeling content of oxides. Under the cyclic ablation mode, C/C-ZrC-SiC composites exhibited better resistance to mass loss compared to C/C-ZrC composites. Moreover, at a single ablation duration of 240 s, C/C-ZrC-SiC composites demonstrated desirable ablation resistance due to the formation of an effective heat/oxygen protection layer.
Article
Materials Science, Multidisciplinary
Qinchuan He, Xiaoyang Jiao, Yiqun Wang, Xuemin Yin
Summary: Precursor content is crucial for the ablation resistance of CLVD-C/C-SiC-ZrC composites. High-content precursors promote the formation of oxide coating, leading to improved ablation resistance. However, excessive precursor content results in increased porosity and decreased ablation resistance.
Article
Materials Science, Multidisciplinary
Running Wang, Ni Li, Jiaping Zhang, Bing Liu, Ningning Yan, Qiangang Fu
Summary: In this study, sharp leading-edge C/C-ZrC-SiC composites with different curvature radii were prepared by reactive melt infiltration, and their ablation behaviors were investigated. It was found that the linear change rates decreased as the radius increased. Samples with smaller radius suffered from more severe ablation at higher temperatures, which can be attributed to the increase in thermal stress, gas erosion, and the decrease of oxide layer stability.
Article
Nanoscience & Nanotechnology
Hao Zhang, Xiubing Liang, Yongle Hu, Peng Zhang, Lingwei Yang, Dongyu He, Manyu Hua, Yonggang Tong
Summary: This study investigated the correlation of C/C preform density with the microstructure and mechanical properties of C/C-ZrC composites, revealing that the composite density decreased with increasing preform density and the flexural strength initially increased and then decreased with preform density. The highest flexural strength of 241 MPa was achieved at a C/C preform density of 1.28 g/cm(3).
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Materials Science, Ceramics
Yong Gao, Bai-Lin Zha, Jin-Jin Wang, Zhen-Sheng Sun, Zhao-Fu Zhang, Yi-Ang Shi
Summary: In this study, C/C-SiC and C/C-SiC-ZrC composites were prepared and their ablation resistance under hypersonic oxygen-rich environmental conditions was investigated. The results showed that C/C-SiC composites exhibited excellent ablation resistance at relatively low temperature and speed, while the high-temperature ablation resistance of ZrC-modified C/C-SiC-ZrC composites significantly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Jing Xu, Lingjun Guo, Jingan Kong, Yuan Ma, Hanhui Wang, Jiancheng Wang
Summary: The bending property of C/C-ZrC-SiC, C/C-SiC, and C/C composites after ablation was studied, and it was found that C/C-ZrC-SiC composites exhibited better laser ablation resistance and higher bending strength retention compared to the other two. The excellent ablation resistance and residual bending strength of C/C-ZrC-SiC composites were attributed to the lowest ablative temperature and the effective protection of ZrO2 grain and ZrO2-SiO2 layer. However, the ablation damage induced a fracture behavior transformation in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Cunqian Fang, Xin Yang, Liyuan Chai, Ze Zhang, Yuanqi Weng, Lei Zheng, Xiao Luo, Xiaxiang Zhang, Qizhong Huang
Summary: LaB6 powders with uniform distribution were in-situ grown in the substrate of C/C felt to fabricate LaB6 modified C/C-SiC-ZrC composites. The composites doped with 22.12 wt%LaB6 exhibited decent mechanical properties and the best ablation resistance among all fabricated composites.
Article
Materials Science, Ceramics
Rongjun Liu, Fu Wang, Jiaping Zhang, Jing Chen, Fan Wan, Yanfei Wang
Summary: The deposition rate and amount of CVI SiC matrix play a crucial role in the manufacturing of SiCf/SiC composites, as the optimal values can enhance the flexural strength and microstructural homogeneity, while excessive deposition leads to closed pores. Additionally, the hybrid CVI and PIP technique improves the density and reduces porosity of the composites, making them more suitable for various industrial applications.
CERAMICS INTERNATIONAL
(2021)
