TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2019
·
IF 2.338
Li-ping RAN,Fei RAO,Ke PENG,Huan YIN,Mao-zhong YI
Ultrahigh-temperature ceramics were added to C/C composites to meet their application requirement in a high-temperature oxidizing environment. C/C−ZrB 2 −SiC composites were fabricated by high-solid-loading slurry impregnation with polymer infiltration and pyrolysis. The dispersion and rheological behavior of ZrB 2 slurry and the microstructural, mechanical, and ablation properties of the C/C−ZrB 2 −SiC composites were investigated. Results indicated that a well-dispersed and low-viscosity ZrB 2 slurry was obtained using 0.40 wt.% polyethyleneimine as a dispersant at pH 5. Ceramics were uniformly distributed in the short-cut fiber layer and needle-punched area. The flexural strength of the C/C−ZrB 2 −SiC composites was 309.30 MPa. The composites exhibited satisfactory ablation resistance under the oxyacetylene flame of 2500 °C, and the mass and linear ablation rates were 0.40 mg/s and 0.91 μm/s, respectively. A continuous and compact ZrO 2 layer, which could effectively reduce the diffusion rate of oxygen and protect the composites from being ablated, was formed.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Wenyan Huang,Yinong Zheng,Qianwen Tao,Yeqi Zhu,Siqi Lan,Ying Yu,Shengjian Mao,Zhichao Xue,Rongqian Yao
High flight speed of hypersonic vehicles will push thermal insulation composites to achieve balanced enhancement of high porosity with increasing load-bearing capability. Herein, hierarchically porous SiC(rGO) polymer-derived ceramics (PDCs) with lightweight, heat-insulating, anti-ablative and tough engineered merits, are designed from polycarbosilane-vinyltriethoxysilane-graphene oxide precursors by re-pyrolysis/graphite-assisted decarburization . Graphite pore-forming agents tightly coupled with SiO x C y /C free (rGO) by C-dangling bonds, can inhibit SiO x C y decomposition, increase ceramic network disorder and expedite concurrent removal of C free . SiO 2 generated from Si-dangling oxidation bonding, efficiently densifies framework to retain mechanical performances, and meanwhile creates more interfaces to enhance phonon scattering. Such structure similar to nodular cast iron confers low thermal conductivity (0.11 W·m -1 ·K -1 ), particularly, fully preserves good compressive strength (5.4 MPa) for SiC(rGO) 40% . Under both cyclic butane flame ablation (∼1300 °C) and long-term oxidation for 7200 s, self-healing effect of SiO 2 imbues products with good structural integrity, shedding light on the opportunity to apply any thermal protection system.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Junjie Xu,Wei Sun,Xiang Xiong,Hongbo Zhang,Lingkun Yang
To improve the ablation resistance of carbon fibre (Cf), alleviate the interdiffusion between Cf and the matrix, and improve the complex preparation process of double-layer carbide coating, a high-quality SiC-HfC double interpenetrating coating was prepared on the surface of Cf using a molten salt synthesis (MSS) method. The microstructure, formation mechanism, and ablation behaviour of the coating were studied. The results show that the coating is composed of interpenetrating HfC and SiC phases. The interpenetrating structure was formed due to the transport of Hf ions into the interior of porous SiC nanowires facilitated by the molten salt medium, followed by diffusion through carbon. The SiC-HfC double-layer interpenetrating coating can serve as an oxygen barrier to protect Cf from oxidative damage under extreme temperature (2000 °C) and aerobic environment (oxyacetylene flame).
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Quan Yuan,Liwei Yan,Jinfeng Tian,Yang Chen,Huawei Zou
With the development of the new generation space vehicles, traditional phenolic resin (PR)-based coatings are no longer able to meet the increasingly harsh thermal environment. There is an urgent need to develop higher performance PR to ensure the flight safety of aircraft. Therefore, in this work, a novel hyperbranched polysiloxane containing Si-O-Zr bond was synthesized and then introduced into PR to develop homogeneous silicone/phenolic hybrid resin coatings. The TG results indicate that the introduction of Si-O-Zr bonds significantly improves the heat resistance of silicone. During ablation, the hyperbranched polysiloxane will undergo a ceramization to produce SiO 2 and ZrO 2 particles, both of which will subsequently generate a highly viscous Zr-Si-O glassy phase as anti-ablation layer. With the fluidity and self-healing properties, it can fill the gaps of the carbon layer and cover the surface of the carbon layer, giving the hybrid resin excellent ablative resistance. The linear ablation rate of the hybrid resin can be as low as 0.003 mm/s, which is an 80 % decrease compared to pure PR. The synthesized hybrid resin is expected to act as superior thermal protection coatings for the next generation of spaceflight.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Hebing Wang,Xiandong Quan,Lianhua Yin,Xiangyu Jin,Yiwu Pan,Can Wu,He Huang,Changqing Hong,Xinghong Zhang
This paper reports a lightweight thermal protection composite with good anti-ablation and thermal insulation properties for service in high temperature environment. The needle quartz fiber (NQF) reinforced phenolic resin aerogel (PRA) composites with surface densification and graded structure were prepared using a mixture of ceramic resin (CR) as the surface layer and phenolic resin (PR) as the internal layer. The Tensile and bending strength of the dense layers were up to 39.22 MPa and 57.22 MPa, respectively. The complete volume rebounded compressive strength of the internal layer was 0.25 MPa and 2.94 MPa in Z and XY directions. In the ablation experiment, the backside temperature peaked at 52 °C within 3 min and 127 °C within 5 min whereas the surface temperature exceeded 1100 °C. Furthermore, the ablated surface remained flat and had a near ablation rate even at a temperature exceeding 1700 °C. The composites which combine insulation and anti-ablation exhibit a prospect in the fields of aerospace and retardant insulation.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ze Zhang,Cunqian Fang,Yuanqi Weng,Xiao Luo,Qizhong Huang,Huiping Hu
Graphene was introduced into C/C–SiC composites via pressureless impregnation to enhance the mechanical and thermal properties of the composites. The effects of various graphene contents on the mechanical and ablative performances of C/C–SiC composites were investigated. The results showed that the ultimate bending stress and compressive stress of the C/C–SiC composites increased by 28.98% and 23.64%, respectively, after adding 7.25% graphene. Moreover, the ablation rates of the composites were vastly decreased after adding a slight graphene content (2.13%). However, the ablation rates increased with increasing of graphene content, indicating that the benefit of introducing graphene on the ablation property decreased, which was mainly ascribed to the relative reduction in the SiC content. As a result, introducing slight graphene into C/C–SiC composites had the greatest benefit on the anti-ablation performance.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2021
·Vol. 21
·期 1
·151-159
·
IF 2.025
Jingwen Ren,Yan Qin,Zhengwei Peng,Zhuangzhuang Li
By introducing functional fillers into the ethylene propylene diene monomer matrix, the anti-ablation, thermal insulation, and adhesive layer were prepared, respectively. We have studied the mechanical properties, ablation properties, thermal insulation properties, and bonding properties of different composite structures after design and analyzed the ceramic mechanism. The results showed that the content of ceramic fillers improved the thermal stability and ablation properties of anti-ablation layer composites. The formation of liquid structure can fill the hole defects and ablation pit. The foaming agent improved thermal insulation properties of the thermal insulation layer, and the strength of the bonding layer has been greatly improved. The design of the composite structure can not only reduce the density but also have an excellent thermal insulation effect. And as the thickness of the heat insulation layer increases, the heat blocking effect becomes more excellent.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
APPLIED COMPOSITE MATERIALS
·
2022
·Vol. 29
·期 6
·2147-2163
·
IF 2.368
Wang Pei,Guo Yonggang,Du Sanming,Jia Yunchao,Zhang Hongbo,Yin Jian
Taking the advantages of porous ceramic (C/C-SiC composite) and transpiration cooling (Copper alloy), C/C-SiC-Cu composite was fabricated to attain a novel anti-ablation material for high temperature structure application of aerospace systems, via chemical vapor deposition and infiltration technologies. The effects of SiC content on microstructure, thermal conductivity, mechanical and ablation properties of C/C-SiC-Cu composite were investigated. As the SiC content increases from 0 vol% to 25.12 vol%, thermal conductivity, flexural strength and ablation resistance are improved by 84.99%, 78.76% and 53.68%, respectively. Thermal conductivity and thermal diffusivity exhibit proportional linear correlation with SiC content. The high SiC content could shorten the yield stage and increase the breaking strength during the flexural fracture process. When the SiC content is 25.12 vol%, the formation continuous and compact anti-ablation (SiO 2 ) layer is formed by oxidizing and melting fluidity processes during oxyacetylene ablation test, and the protective layer covers the ablation surface and slows down the oxidative ablation, which combines with the transpiration cooling effect of copper alloy to further improve ablation resistance of C/C-SiC-Cu composite.
研究领域:
航空航天材料科学
·
高温结构材料
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Yang Lyu,Yuan Cheng,Guangdong Zhao,Mengyu Wang,Guiqing Chen,Xinghong Zhang,Wenbo Han
The SiBCN(Zr) ceramics were synthesized via a polymer-derived ceramics route. Using this precursor, the precursor impregnation pyrolysis process prepared the C f /SiBCNZr composites with low density (1.89 g/cm 3 ). Compared to C f /SiBCN, the C f /SiBCNZr composites exhibit reliable thermal stability and ablation resistance in a wide temperature range. A dense oxide layer dominated by ZrO 2 and SiO 2 formed in situ on the surface of C f/ SiBCNZr, effectively preventing outside oxygen and further ablation. The introduced Zr is evenly distributed in SiBCN ceramics, which enables it to give full play to the ablation resistance of Zr at higher oxygen acetylene torch temperatures. This work enriches the fundamental understanding and offers engineering guidance for lightweight ultra-high temperature ceramic matrix composites .
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·
IF 29.4
Wenzheng Zhang,Mingyi Tan,Daming Chen,Boqian Sun,Yuan Cheng,Liancai Xun,Jingsheng Hu,Chenlin Hou,Yuxuan Liu,Yuhao Fang,Ping Hu,Wenbo Han,Shun Dong,Shanyi Du,Jiecai Han,Shuxi Miao,Qidong Yang,Yanchun Zhou,Xinghong Zhang
Sugars are renewable resources essential to human life, but they are rarely used as raw materials for the industrial production of carbon-based materials, especially for the preparation of carbon fiber-reinforced carbon-matrix (C/C) composites, which are extremely useful for the semiconductor and aerospace sectors. Herein, a method utilizing sugar-derived carbon to replace petrochemicals as dense matrix to preparing C/C composites is reported. The matrix from sugar-derived C/C (S–C/C) composites has a nanocrystalline graphite structure that is highly thermally stable and effectively bonded to the carbon fibers. The mechanical properties of the S–C/C composite are comparable to those prepared from petrochemical sources; significantly, it exhibits a linear ablation rate of 0.03 mm s −1 after 200 s of ablation at 3000 °C in 10 MW m −2 heat flux. This new class of S–C/C is promising for use in a broad range of fields, ranging from semiconductor to aerospace.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2025
·
IF 3.6
Hongfei Chen,Xiaolong Qu,Jingwen Wang,Mengmeng Ge,Yanfeng Gao
High-performance anti-ablation silicone rubber materials play a crucial role in the thermal protection systems of electric vehicle battery packs. However, conventional flame-retardant silicone rubbers containing fillers often suffer from poor ablation resistance at high temperatures and inadequate structural integrity. In this work, a novel approach was proposed in which the liquid ceramic precursor polyborosilazane (PBSZ) was incorporated into methyl vinyl silicone rubber via melt blending to construct a ceramic-forming network, thereby preparing ceramifiable, flame-retardant composite materials. Compared with unmodified silicone rubber, the composite containing 6 wt% PBSZ exhibited a 78°C increase in initial decomposition temperature, achieved a limiting oxygen index (LOI) of 25.6%, and reached a flexural strength of 12.68 MPa after treatment at 1000°C. Furthermore, after exposure to a 1000°C flame for 1 min, the back-surface temperature remained below 300°C. As the temperature increases, the flexible silicone rubber undergoes ceramization, forming a dense and stable ceramic structure. This work provides a promising strategy for the development of high-performance, flexible, and ablation-resistant materials.
研究领域:
材料科学
·
高分子科学
·
陶瓷材料
·
热防护系统
·
电动汽车电池技术
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Hongbiao Sun,Genyou Shi,Zhonglei Kang,Hangyu Zhong,Weijian Han,Zhenhua Luo,Bo-xing Zhang
High-strength, flexible, high-temperature resistant, and lightweight electromagnetic shielding materials are in urgent demand in the aerospace and electronic industries. In this work, we fabricated thin and flexible multilayer carbon nanotube film (CNT f ) toughened silicon carbide (SiC) composite films using dip-coating and hot-pressing technology with polycarbosilane/allyl phenolic resin (PCS/APR) as ceramic precursors. CNT f provides flexibility, mechanical strength, and electromagnetic shielding properties. Ceramic precursors act as the binder between CNT f layers during the hot-pressing and high-temperature treatment process, endowing composite films with improved mechanical properties, electromagnetic shielding performance, and ablative resistance. The 5-layer-CNT f composite films, with a thickness of around 50 μm, possess high tensile strength (152 MPa), extraordinary electromagnetic shielding effectiveness (73 dB), and excellent ablative resistance. The butane torch burning test demonstrates that the composite film retains its mechanical integrity after 90 s of burning test. This study develops a facile method to fabricate thin and flexible CNT f /SiC composite films, which may have potential applications for high-temperature electromagnetic shielding materials.
研究领域:
材料科学
·
航空航天工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）