Article
Materials Science, Multidisciplinary
Guanghui Feng, Hejun Li, Xiyuan Yao, Bin Ren, Yujun Jia
Summary: In this study, a multilayer coating based on ZrC-SiC system was successfully fabricated and its performance was evaluated through ablation tests. The results showed that the coating exhibited excellent ablation resistance, with only shallow ablation pit forming under laser irradiation.
Article
Materials Science, Ceramics
Guanghui Feng, Hejun Li, Xiyuan Yao, Lei Chen, Yulan Yu, Hanhui Wang, Miaomiao Chen
Summary: The ablation behavior of ZrC and ZrO2 coatings on SiC-coated carbon/carbon composites was studied under different heat fluxes, demonstrating that ZrO2 coating exhibited denser oxide layer and lower mass consumption compared to ZrC. The differences were attributed to higher surface temperature and lower melting point of ZrO2 coating, leading to easier sintering during ablation.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Guanghui Feng, Xiyuan Yao, Yulan Yu, Hejun Li
Summary: In this study, the influence of sublayer numbers on structure evolution and thermal stress level was investigated. An alternate coating with ZrC-10 vol.% SiC and ZrC-70 vol.% SiC sublayers was designed and assessed using oxyacetylene torch. The results showed that the coating with 6 sublayers exhibited the best ablation property and the least thermal stress among all samples. Si-based products were found to contribute to the development of a dense profile on the surface, and the generated alternate dense/porous scale had good toughness.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jingchao Ma, Sijie Kou, Shaobo Yang, Yinghao Liu, Chenghua Luan, Peng Wang, Shangwu Fan
Summary: C/C-ZrC-SiC composites with different coatings were prepared and their ablative behavior was studied. The results showed that the coating with YSi2 doping improved the ablative resistance of the composites.
Article
Materials Science, Coatings & Films
Xiao Luo, Xin Yang, Qizhong Huang, Anhong Shi, Cunqian Fang, Yuanqi Weng
Summary: The study demonstrates that in high-temperature aerobic environment, the ZrC-TaC/ZrC-SiC coating system can effectively protect carbon materials from oxidation and improve ablation resistance. However, at lower heat flux, inadequate chemical combination between the layers can result in reduced overall resistance to ablation.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Ruixiang He, Kezhi Li, Wenhao Zhang, Longqi Liu
Summary: The ablation resistance of plasma-sprayed NbC-TaC coatings on ZrC/SiC doublelayer-coated C/C composites was tested using an oxyacetylene flame. The phase composition of ZrO2-Ta2O5 systems heat-treated at 2100 degrees C was determined. The formation of a Ta-O film extended the effective ablation time of the TaC coating, and the addition of 37.5 mol% TaC produced the best ablation property.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Bao-Xia Ma, Yang Wang, Si-Cong Zhao, Hao-Nan Wu, Yang Qiao
Summary: The feasibility of in situ synthesis of ZrB2-SiC-ZrC composite coatings on ZrC ceramics by reactive plasma spraying (RPS) was investigated. The phase evolution during the plasma spraying process was understood through careful exploration of the reaction behavior in the ZrH2-Si-B4C system.
Article
Materials Science, Multidisciplinary
Zhigang Zhao, Kezhi Li, Wei Li
Summary: ZrC-SiC-ZrB2 and ZrC-SiC inhibited carbon/carbon composites wedge shaped components were fabricated by reactive melt infiltration and tested on an oxyacetylene torch at a heat flux of 2.38 MW/m2 for 120 s. Compared with C/C composites, both inhibited composites components exhibited better ablation resistance with tip temperatures reaching about 2500 degrees C. Structural evolution on the surfaces of the inhibited composites components included a porous ZrO2 layer near the tip, layered structure of the outer ZrO2 layer, subsurface ZrO2-SiO2 layer in the intermediate region, and SiO2 layer in the tail.
Article
Materials Science, Multidisciplinary
Yunyu Li, Yichen Liu, Chen Guo, Yibin Chen, Junhao Liang, Jian Zhang, Jiaping Zhang, Lingjun Guo
Summary: The realization of functionalized coating design is an effective means to enhance the ablation resistance. A multi-layer structure coating based on ZrC composite was successfully developed and applied on the surface of SiC coated C/C composites. The coating demonstrated excellent ablation resistance for 240 s under harsh ablation environments with temperatures exceeding 2200 degrees C.
Article
Materials Science, Coatings & Films
Yu-xuan Shao, Yong Yang, Yong-gang Wang, Ce-ce Zhao, Wei Tian, Yan-wei Wang, Xing-yu Wang
Summary: A ZrC anti-ablation composite coating was prepared using atmospheric plasma spraying, by introducing the chemical reaction between Zr and SiC. The as-prepared ZrC coating showed desirable protection for 20 s ablation, with the oxide layer formed after ablation mainly composed of tetragonal zirconia (over 50 wt%). The microstructure evolution of the ablated coating surface was clearly observed. It was found that zirconia and silica exhibited good compatibility and cooperation after 15 s ablation, forming a dense Zr-Si-O anti-ablation layer. The presence of meta-stable zirconia in the oxide layer could be attributed to the smaller grain size and compact arrangement of zirconia particles.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ruixiang He, Kezhi Li, Qian Liu
Summary: Among NbC-ZrC coatings, an NbC coating modified with 30 mol.% ZrC demonstrates the best ablation-resistant property, forming a thick oxide film primarily composed of NbO and NbxZr1-xO2 phases. Additionally, the reaction-diffusion formed Nb-rich layer acts as a barrier to infiltrating oxygen, providing anti-oxidation protection for the SiC transition layer.
Article
Metallurgy & Metallurgical Engineering
Meng-meng Shao, Zhao-ke Chen, Xin-shuang Wang, Qing-bo Wen, Xiang Xiong
Summary: To enhance the anti-ablation property of C/C composites, ZrC-SiC-MoSi2 coatings with different Zr contents were prepared on C/C-SiC-ZrC ceramic matrix composites. The ablation behavior of the coated composites was studied in an oxyacetylene torch environment with varying oxygen and acetylene fluxes. The results showed that the particle sizes of ZrC and SiC in the coatings decreased and distributed more homogeneously with the increase of Zr content. The ablation mechanisms of the coatings changed from oxidation to oxidation plus evaporation and then to the combination of oxidation, evaporation, and denudation with the increase of oxygen and acetylene fluxes.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Yuqi Wang, Lingxiang Guo, Yuyu Zhang, Xuemeng Zhang, Hongkang Ou, Jia Sun
Summary: To improve the ablation performance of C/C composite at 3000 degrees C, a ZrC-SiC-Si/SiC-Si double-layered coatings (ZSS/SS) was prepared. The ZSS/SS coating showed the lowest linear ablation rate of 0.53 μm/s in 90 s with a parabolic rate constant Kp (0.053 μm/s^3), attributed to good self-sealing of oxidation derived glassy. However, for long-term ablation, the Kp became worse (0.131) due to dominant mechanical denudation.
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
Yuyu Zhang, Jia Sun, Lingxiang Guo, Kaifei Fan, Ralf Riedel, Qiangang Fu
Summary: In order to enhance the ablation resistance of ZrC coating on SiC-coated carbon/carbon composites above 2000 degrees C, SiC/TiC nanocomposites were incorporated into the ZrC coating via supersonic atmospheric plasma spraying (SAPS), resulting in the formation of ZrC-SiC/TiC-NCs coating. The good ablation resistance of the coating is mainly attributed to the distinctive capsule-like multi-crystalline microstructure of SiC/TiC-NCs, which helps in the formation of a high viscosity and low evaporation pressure Zr-Ti-Si-O glass during ablation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Md Atiqur Rahman Chowdhury, Kewei Wang, Yujun Jia, Chengying Xu
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Chemistry, Physical
Yujun Jia, Atiqur Rahman Chowdhury, Chengying Xu
Article
Materials Science, Ceramics
Yujun Jia, Md Atiqur Rahman Chowdhury, Chengying Xu
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Ceramics
Yujun Jia, Tosin D. Ajayi, Chengying Xu
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Ceramics
Yujun Jia, Shashvat Tejaskumar Mehta, Ryan Li, Md Atiqur Rahman Chowdhury, Timothy Horn, Chengying Xu
Summary: This research evaluates the feasibility of using electron beam melting (EBM) for the additive manufacturing of ultra-high temperature ceramics (UHTCs) and investigates the microstructures of the fabricated materials under different processing conditions. A mathematical model was developed to optimize the processing parameters and the simulation results were compared with experimental observations. The potential for additive manufacturing of UHTCs with complex geometries using EBM technique is demonstrated in this study.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Yujun Jia, Tosin D. Ajayi, Benjamin H. Wahls, Kishore Ranganath Ramakrishnan, Srinath Ekkad, Chengying Xu
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Coatings & Films
Yujun Jia, Tosin D. Ajayi, Kishore Ranganath Ramakrishnan, Ankit Negi, Jun Liu, Srinath Ekkad, Chengying Xu
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Guanghui Feng, Hejun Li, Xiyuan Yao, Bin Ren, Yujun Jia
Summary: In this study, a multilayer coating based on ZrC-SiC system was successfully fabricated and its performance was evaluated through ablation tests. The results showed that the coating exhibited excellent ablation resistance, with only shallow ablation pit forming under laser irradiation.
Article
Materials Science, Multidisciplinary
B. Li, H. J. Li, X. Y. Yao, X. F. Tian, Y. J. Jia, G. H. Feng
Summary: In this study, a (ZrC/SiC)(3) alternate coating was deposited on sharp leading edge (SLE) C/C composites using chemical vapor deposition (CVD). The ablation behavior of the coating was evaluated, and the results showed that the alternate coating exhibited excellent resistance to ablation and provided effective protection for the C/C composites. The coating showed different mechanisms for ablation resistance in different regions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Guanghui Feng, Hejun Li, Xiyuan Yao, Jia Sun, Yujun Jia
Summary: In this study, a multilayer coating with different sublayer thicknesses was fabricated on SiC-coated C/C composites using plasma spraying. The relationship between sublayer thickness and thermal stress was investigated through finite element analysis and practical experiments, showing a close connection among sublayer thickness, residual stress, and ablation behavior.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Zhiqiang Liu, Qiangang Fu, Huilun Shi, Jiaping Zhang, Yujun Jia
Summary: C/C-SiC-HfC composites were prepared using reactive melt infiltration (RMI) with different pressure conditions. The distribution of SiC and HfC ceramics can be regulated by adjusting the RMI pressure, resulting in different surface compositions. The composites prepared under normal pressure exhibited better ablation performance with the formation of a HfSi2-HfC-SiC mixed layer. The presence of HfSi2 improved the densification of HfO2 film, enhancing the ablation resistance.
MATERIALS CHARACTERIZATION
(2022)
Article
Multidisciplinary Sciences
Yujun Jia, Ni Yang, Shaofan Xu, Alexander D. D. Snyder, Jason F. F. Patrick, Rajan Kumar, Dajie Zhang, Chengying Xu
Summary: This study reports ceramic composites with excellent and stable high-temperature microwave absorption in air, made of polymer-derived SiOC reinforced with core-shell nanophase structure of ZrB2/ZrO2. The stable high-temperature electromagnetic absorption properties are attributed to the stable dielectric and electrical properties induced by the core-shell nanophase structure. Experimental results demonstrate that the developed ceramic composites have high stability in harsh environments, and can be used as high-temperature wide-band microwave absorbing structural materials.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Ceramics
Guanghui Feng, Yulan Yu, Xiyuan Yao, Xiaopeng Wu, Hao Zhang, Yujun Jia, Hejun Li
Summary: There is a urgent need to protect carbon/carbon composites in aerospace field by improving their thermal resistance. HfC and ZrC, as ultra-high temperature ceramics, are considered as alternative materials, but their poor oxidation behavior and fracture toughness at temperatures over 2000 degrees C limit their full potential. In this study, we synthesized nanosized Hf6Ta2O17 powders and incorporated them into HfC ceramic to address these issues. Plasma-sprayed HfC coatings containing varying amounts of Hf6Ta2O17 (0, 1.25, 2.5, 5, 15 mol.%) were subjected to an oxyacetylene torch with a heat flux of 2.38 MW/m2. The coating with 2.5 mol.% Hf6Ta2O17 exhibited the best resistance to ablation. Smaller doping amounts were ineffective in hindering oxygen diffusion due to inadequate scale compactness, while higher amounts resulted in significant humps and ruptures, creating direct paths for oxygen.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Manufacturing
Md Atiqur Rahman Chowdhury, Kewei Wang, Yujun Jia, Chengying Xu
JOURNAL OF MICRO AND NANO-MANUFACTURING
(2020)
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)