CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hengrui Zhang,Yunjia Xue,Liwen Yan,Anran Guo,Haiyan Du,Jiachen Liu
Aluminum silicate fiber fabric (ASFF) has been widely used in the outer surface of flexible insulation felt on the leeward side of aerospace vehicle. In order to improve the temperature resistance of ASFF, a kind of SiC–ZrC composite coating was prepared on the surface of fiber fabric via spraying method with SiC as emittance agent and ZrC as additive. The surface morphology and mechanical properties of the coating were studied. Compared with the single-component SiC coating, the composite coating could effectively avoid coating spalling and improve the surface integrity at high temperature. After thermal treatment at 1100 °C for 2 h, the interface bond strength of the composite coating/substrate was 52.41% higher than that of SiC coating/substrate. The tensile strength of fiber fabric with SiC–ZrC composite coating could reach 91.75 MPa, which was 101.76% higher than that of raw ASFF. Therefore, the SiC–ZrC coating could greatly improve the temperature resistance of ASFF, and has an attractive application prospect in the field of thermal protection system.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Bingfeng Liu,Yaruo Jin,Zhijiang Wang,Defeng Xing,Chao Ma,Jie Ding,Nanqi Ren
In order to strengthen photo-fermentative hydrogen production by different photocatalytic nanoparticles , hydrogen production by photo-fermentative bacteria with addition of TiO 2 , ZnO and SiC nanoparticles in batch culture were investigated in this study. The results indicated that three nanoparticles could improve hydrogen production performance of Rhodopseudomonas sp. nov. strain A7 under respective optimal conditions. The hydrogen yield of 2.81 mol-H 2 /mol-acetate was obtained when TiO 2 nanoparticles with a concentration of 300 mg/L and size of 25 nm. The concentration of ZnO nanoparticles was at 100 mg/L, hydrogen yield reached 2.64 mol-H 2 /mol-acetate. Compared with TiO 2 and ZnO nanoparticles, SiC nanoparticles exhibited greatest potential for enhancing photo-hydrogen production. By addition of nano-SiC with concentration of 200 mg/L which was prepared at temperature of 1500 °C, the maximum hydrogen volume, average hydrogen content and hydrogen yield of strain A7 were achieved at 2272 mL-H 2 /L-culture, 85.2% and 2.99 mol-H 2 /mol-acetate, respectively. And hydrogen production was 18.6% higher than that of alone strain A7 without the addition of nanoparticles. Therefore, the addition of SiC nanoparticles is a promising strategy to improve photo-fermentative hydrogen production from wastewater.
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高影响因子
Polymers
·
2022
·Vol. 14
·期 11
·2297
·
IF 4.967
Xupeng Song,Wei Yang,Shouchao Huo,Kun Wang,Yuanyuan Wu,Yun Chen,Jian Qiao,Boyang Shen,Xingming Bian
SiC/EP composites are promising insulating materials due to their high thermal conductivity, stable chemical properties, and nonlinear electrical conductivity. However, the compatibility of micron-sized SiC particles with the organic polymer matrix is poor, and defects such as air gaps may be introduced at the interface, which reduces the partial discharge resistance of the composite materials. In order to improve the partial discharge initial voltage (PDIV) of SiC/EP composites, in this paper, SiC/EP composites with different proportions were prepared by surface modification of filler and compound of micro/nano particles. Firstly, a method of secondary modification of SiC particles was proposed, which was first modified by alkali washing and then silane coupling agent KH560, and the effectiveness of the modification was verified. Therefore, the interface bonding ability between the filler and the matrix was improved, the air gap defects at the interface were reduced, and the PDIV of the composite material was improved. When the filling ratio is 10 wt%, the PDIV was enhanced by 13.75%, and when the filling ratio was further increased, the improvement was reduced. In contrast, the introduction of nanoparticles into the composites can effectively improve the PDIV of composite materials. In this study, nanoparticles were used to form a shell-core structure in epoxy resins to exert their huge specific surface area and active surface properties, thereby changing the overall crosslinking properties of the composites. Through experimental research, the optimal micro-nano particle compounding ratio was explored. Under the optimal mixing ratio, the PDIV of the composite material can be increased by more than 90%.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Cuiyan Li,Jintao Wang,Haibo Ouyang,Tianzhan Shen,Zihao Chen,Leer Bao,Yanlei Li,Qiaoqiao Wang
s To reduce the cost of C/C-ZrC-SiC composites, an inorganic salt strategy was proposed for fabricating these composites using the PIP method. The precursor solution, composed of zirconium tetrachloride, tetraethoxysilane, and furfuryl alcohol, exhibits lower viscosity, facilitating more efficient infiltration into the C/C matrix and reducing porosity in the final composite. Fine ZrC and SiC particles, with an average particle size of 2.03 μm, were homogeneously distributed within the composite matrix. The resulting material demonstrated a flexural strength of 193.2 MPa, along with linear and mass ablation rate of 0.03 μm/s and 0.10 mg/s, respectively. The uniform distribution of fine ZrC and SiC particles within the dense matrix significantly enhances mechanical properties and ablation resistance. During ablation, these particles promote the formation of a protective oxide scale consisting of a dense outer ZrO 2 layer and an inner SiO 2 layer. The dense ZrO 2 layer effectively retards oxygen diffusion into the composite, providing excellent resistance to mechanical erosion, while the continuous SiO 2 layer minimizes the ingress of oxidizing gases, further enhancing ablation resistance. This study demonstrates that the inorganic salt strategy can be used to fabricate C/C-ZrC-SiC composites at a lower cost while achieving superior properties, offering a promising approach for producing C/C-UHTCs composites.
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 4
·1-14
·
IF 2.5
Guo Chenxi,Yang Xin,Zhang Xiaxiang,Li Hongtao,Liao Mingdong,Huang Qizhong
To shorten the manufacturing process and enhance the ZrC content, C/C-SiC-ZrC composites were prepared using the nano-filler slurry infiltration method in combination with precursor infiltration and pyrolysis method. The effect of ZrC filler sizes on densification, microstructure, and properties of composites was studied. Results revealed that the ZrC content and density of the C/C-SiC-ZrC composites are inversely correlated to the filler size. The composites with nano-fillers reach the highest density of 2.67 g cm −3 as well as the lowest open porosity of 1.21%. After being ablated under oxyacetylene flame for 60 s, the composites with nano-fillers owns the lowest linear ablation rate and surface temperature, with 10 μms −1 and 2700 °C. Due to the highest ZrC content and best film-forming ability of nano-fillers, ZrO 2 outer layer with the densest structure can provide an enhanced protective effect, and the thickness of the oxide layer decreases from 509 to 264 μm as compared with micron fillers. Therefore, the oxidation damage of the composites is reduced, and the thickness of the SiC depletion layer decreases simultaneously. The above results further demonstrate that introducing ZrC nano-filler to the C/C-SiC-ZrC composites can considerably improve their ablative properties at 2700 °C.
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高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Chuangfang Tao,Huanyi Liao,Bin Chen,Weiguo Mao,Jie Wang,Cuiying Dai,Zheqiong Fan,Zhe Zhou,Jinglv Zuo
The (PyC-C sf )/ZrB 2 -SiC-ZrC ceramics are fabricated by reactive spark plasma sintering (RSPS) at 1200 °C. The sample has a low density and intact pyrolytic carbon modified carbon fiber (PyC-C sf ). After three cycles of ablation (heat flux = 2.38 MW/m 2 , t = 120 s), samples demonstrate excellent resistance to oxidative ablation. The mass recession rate and linear recession rate for the sample are 3.41 g/m 2 ∙s and 0.68 µm/s, respectively. Excessive content of carbon destroys the oxide layer by forming large amounts of CO 2 during the ablation process. The inner layer of intact PyC-C sf aggregates around the borosilicate which are denser in the oxide layer. Finally, a porous ZrO 2 -SiO 2 layer and a dense ZrO 2 -SiO 2 -C sf layer are formed on the surface of the sample which resists ablation.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yan Liang,Yongqing Wang,Junjie Qian,Li Liu,Yulong Yang,Mingmin Bai,Haotian Zheng
Silicon carbide (SiC) ceramic membrane supports, as critical components of ceramic membrane filters, must exhibit outstanding performance in mechanical properties, porosity, and chemical stability. In this study, MoO₃ was employed as a sintering aid, with SiC and α-Al₂O₃ serving as raw materials and walnut shell powder as a pore-forming agent. The effects of varying sintering temperatures (1250–1400°C) and MoO₃ contents on the properties of SiC porous ceramic membrane supports were systematically investigated. Special emphasis was placed on elucidating the mechanisms by which MoO₃ addition influences porosity, flexural strength, pore size distribution, and chemical stability. Experimental results demonstrate that the introduction of MoO₃ facilitates low-temperature sintering of SiC supports through a dissolution-precipitation mechanism. This process promotes the formation of mullite whiskers that reinforce interparticle necking regions while enhancing the uniformity of neck connections. Optimal performance was achieved at 1350°C with 8 wt% MoO₃ addition, yielding a bending strength of 37.01 ± 1.72 MPa, average pore size of 1.735 μm, most probable pore size of 1.7 μm, open porosity of 39.12 %, and exceptional corrosion resistance. This work establishes both theoretical foundations and practical strategies for low-temperature fabrication of high-performance SiC porous ceramics, while expanding the application potential of molybdenum-based sintering aids in structure-function integrated ceramic materials.
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高影响因子
Energies
·
2025
·Vol. 18
·期 5
·1216
·
IF 3.2
Xiaojiao Wang,Libing Zhu,Yan You,Zhaoquan Zhang
Thermal conductivity is the key property of SiC-TRISO composite fuel. This study investigated the relationship between SiC phase transition, thermal conductivity, and microstructure across different temperatures. The physical phase, morphology, and microstructure of SiC and SiC-TRISO composite fuels were characterized by XRD and SEM. Meanwhile, EDS was employed to determine the chemical composition within SiC grains. The results showed the transformation of the β-SiC phase to α-SiC in the matrix with increasing sintering temperature, while Al, Y, and Ca concentrations within the SiC grains decreased. The highest λ value of SiC was achieved at a sintering temperature of 1750 °C, measuring 75.51Wm·Kat room temperature and 43.36Wm·Kat 500 °C. The incorporation of TRISO fuel lowered theλvalue of SiC-TRISO composite fuel, yielding 57.96 and 34.51Wm·Kat room temperature and 500 °C, respectively. The outermost carbon layer of TRISO fuel interacts with the silicon carbide matrix and liquid phase, facilitating the phase transition from 3C-SiC to 6H-SiC and, subsequently, to 4H-SiC. This process accelerates the depletion of Al, Y, and Ca within the silicon carbide grains, encourages grain growth, and raises the free-carbon content, thereby decreasing the λ of the composite fuel.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 2
·117816
·
IF 6.2
Bo Li,Hejun Li,Yigao Chen
Combining ZrC and SiC monolayers to form alternating multilayers on C/C composites allows to achieve advanced properties. Herein, a one-step CVD method was developed to fabricate the (ZrC/SiC) n multilayer alternating coatings with high fabrication efficiency, high bonding strength and precise control of sublayer thickness and number. The deposition behavior of coating was demonstrated to be the hetero-epitaxial growth at the interface and the preferential growth of SiC and ZrC columnar grains. It brought a pure and tight interface between SiC and ZrC, with high bonding strength (ten times higher than common CVD method). The indentation response, scratch behavior and pullout test of the coating were studied to obtain the strengthen mechanism of one-step deposition. The increase of interfacial bonding strength gave the coating the ability to resist the delamination of sublayers, resulting in the improved mechanical properties and further superior ablation resistance.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Chen Xie,Shaolei Song,Guanzhong He,Zhihui Mao,Cuncheng Ma,Tong Zhang,Pengfei Hu,Qiang Zhen
Poor antioxidant and thermal-shock capacities of C/C composites thermal barrier coating (TBC) caused by cracking and shedding of coatings has been a major obstacle blocking the development of C/C composites. Herein, in-situ growth of whisker reinforced silicon carbide transition layer and inter-embedding mechanism of multi-gradient coatings were brought into the design of TBC to enhance the antioxidant and thermal-shock capacities. A three-layer gradient coating SiC-SiC w /ZrB 2 -SiC/ZrSiO 4 -aluminosilicate glass (ZAG) from inside to outside, in which ZrB 2 -SiC/ZAG serve as oxygen barrier layers with self-healing ability and SiC-SiC w provides thermal stress buffering and bonding against cracking and shedding of coatings, is designed. The ZAG mainly forms a dense oxygen blocking frontier with self-healing ability through fluidized glass, while the ZrB 2 -SiC can react actively with infiltrated oxygen in a way of self-sacrifice, preventing oxygen erosion to C/C matrix and SiC-SiC w transition layer. As a result, the collaborative work among layers endows this coating with excellent high temperature service performance. This work provides a new insight for the design of excellent TBC.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 1
·82-93
·
IF 3.094
Pengju Chen,Peng Xiao,Zhuan Li,Ling Pan,Jinwei Li,Zeyan Liu,Dongmei Pu,Yang Li
Mullite coating, SiC whiskers toughened mullite coating (SiC w -mullite), and cristobalite aluminum phosphate ( c -AlPO 4 ) particle modified SiC w -mullite coating ( c -AlPO 4 -SiC w -mullite) were prepared on SiC coated C/SiC composites using a novel sol-gel method combined with air spraying. Results show that molten SiO 2 formed by the oxidation of SiC whiskers and molten c -AlPO 4 improved the bonding strength between mullite outer coating and SiC–C/SiC composites due to their high-temperature bonding properties. The bonding strength between mullite, SiC w -mullite, c -AlPO 4 -SiC w -mullite outer coatings and SiC–C/SiC composites were 2.41, 4.31, and 7.38 MPa, respectively. After 48 thermal cycles between 1773 K and room temperature, the weight loss of mullite/SiC coating coated C/SiC composites was up to 11.61%, while the weight losses of SiC w -mullite/SiC and c -AlPO 4 -SiC w -mullite/SiC coatings coated C/SiC composites were reduced to 7.40% and 5.12%, respectively. The addition of appropriate SiC whiskers can considerably improve the thermal shock resistance of mullite coating owing to their excellent mechanical properties at high temperature. In addition, c -AlPO 4 particles can further improve the thermal shock resistance of SiC w -mullite coating due to their high-temperature bonding and sealing properties. No obvious micro-pores and cracks were observed on the surface of c -AlPO 4 -SiC w -mullite coating after 48 thermal cycles due to timely healing effect by formation of secondary mullite.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 47
·期 1
·118778
·
IF 6.3
Longgang Wan,Dongliang Jin,Zhengxian Di,Honggang Sun,Xiqiang Ma,Jie Lu,Shizhong Wei,Hongxia Li
Porous recrystallized silicon carbide (RSiC) is a promising structural ceramic for heat exchange and hydrogen metallurgy, but long-term steam exposure impairs its oxidation behavior and mechanical reliability. In this work, porous RSiC fabricated from α-SiC powders was oxidized in steam at 1100–1300 °C. The oxide-scale thickness followed a parabolic law with an apparent activation energy of 151 kJ/mol. Steam oxidation reduced porosity and skeleton thickness, while normalized neck size and crack density increased with time. Flexural strength showed non-monotonic evolution. A S - N - D model integrating skeleton support, neck strengthening and crack damage was developed, which can reproduce the strength evolution with high R ². Fitted parameters showed neck strengthening efficiency drops with temperature, while crack damage shifts from abrupt to gradual accumulation. Overall, RSiC strength evolution in steam is governed by competition between early neck strengthening and long-term skeleton degradation and crack damage.
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高影响因子
危险品化学品经营许可证（带存储）