APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Dongyang Zhang,Hongying Yu,Anzhe Wang,Qi Wang,Lu Ren,Ping Hu,Dongbai Sun
The need for synergy of strengthening and anti-oxidation under high-temperature and oxidative environment imposes new demands on nonablative thermal protection materials. Herein, 2D C f /ZrB 2 -SiC composite with superior damage tolerance and excellent oxidation resistance were constructed using a simple fiber heat treatment. An enhanced flexural strength of 234 ± 18 MPa and an intermediate work of fracture of 1342 J/m 2 were obtained for 2D C f-HT /ZrB 2 -SiC composite, increasing by nearly 19.4% and 171.7% as compared with those of C f-AR /ZrB 2 -SiC sample, triggered by multiple toughening mechanisms including crack bifurcation, fiber bundles pull-out and bridging. The surface of 2D C f-HT /ZrB 2 -SiC composite was covered with a dense silica glass layer and embedded with a few zirconia particles after oxidation at 1500 °C for 1 h, resulting in an excellent oxidation resistance. This work presents a simple approach to achieve the synergy of superior damage tolerance and oxidation resistance of continuous carbon fiber reinforced ceramic matrix composite.
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
CORROSION SCIENCE
·
2022
·
IF 7.72
Wanbo Hou,Tao Feng,Xiangyuan Meng,Xinhao Shi,Mingde Tong,Hejun Li,Hongjiao Lin
The ablation resistance of C f /HfC PIP -SiC CVI composites was tested under an oxyacetylene flame. After ablation, many SiO 2 nanowires were in-situ grown in the edge region. From the edge region to the transition region, the melting behaviors of SiO 2 nanowires was gradually intensified, and finally, they completely transformed into SiO 2 glass. At the border of the central region and the transition region, the HfO 2 grains were gradually precipitated from the SiO 2 glass and formed a tubular structure. By comparing the ablation behaviors at different temperatures and times, the ablation mechanisms of C f /HfC PIP -SiC CVI composites was investigated systematically.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fan Zhang,Dewei Ni,Bowen Chen,Feiyan Cai,Hongda Wang,Le Gao,Ping He,Yusheng Ding,Shaoming Dong
Ultrahigh temperature and long-term ablation-resistant properties are critical and challenging for the utilization of materials as the thermal components of hypersonic vehicles. In this work, Y 2 O 3 reinforced C f /HfB 2 -SiC composites are designed and fabricated, which present superior ablation resistance with a mass recession rate of 2.10 mg/s and linear recession rate of 0.67 μm/s (with 3 wt% Y 2 O 3 addition) under long term ablation at a heat flux of 5.5 MW/m 2 (up to ∼ 2700 °C) for 300 s. The long-term ablation mechanisms of the composites are studied and revealed with the help of a detailed microstructure analysis and thermodynamic considerations. It is indicated that Y 2 O 3 reacts with both HfO 2 and SiO 2 , leading to the formation of a stable oxide layer with small HfO 2 -based grains skeleton dispersed in HfO 2 -Y 2 O 3 -SiO 2 glassy phase, subsequently improving the ablation-resistant performance of the composites. This work inspires new strategies for further optimization of ablation resistance of 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
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ertai Zhang,Shuyan Guan,Haojun Fan,Yongxin Wang,Hui Yan,Lei Guo,Xuedong Zhai,Carlos A. Martínez Huitle,Jing Ding
Sulfite has been proven to promote advanced oxidation processes (AOPs) to achieve low-cost and efficient degradation of contaminants, serving as an alternative to persulfate. In this study, a novel composite Fe/Mn@carbon felt (CF) electrode was successfully constructed to remove carbamazepine (CBZ). The capacity of the Fe/Mn@CF anode to activate sulfite was evaluated under various electrode preparation conditions and operating parameters. Results clearly indicated that the complete removal of CBZ was achieved in Fe/Mn@CF anode activated sulfite system under the specific conditions including Na 2 SO 4 electrolyte concentration of 50 mM, sulfite dosage of 1 mM, initial pH of 7, and current density of 1 mA/cm 2 . The capacity of Fe/Mn@CF anode for sulfite activation was further presented by its excellent reusability and stability in terms of CBZ removal and metal ion release. Both radical and non-radical pathways were significantly contributed to the CBZ removal, including OH, SO 4 · - , O 2 · - , 1 O 2 , and other reasons. Density functional theory (DFT) calculations demonstrated that Fe-Mn bimetals effectively promoted sulfite activation, with the electric field further boosting the process of Fe-Mn valence cycle and oxidation. Overall, the novel Fe/Mn@CF activated sulfite system exhibited outstanding performance and had great potential for sustainable use in removing organics.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xiang Li,Erbiao Cui,Zhen Xiang,Lunzhou Yu,Juan Xiong,Fei Pan,Wei Lu
Electromagnetic (EM) wave absorbing materials have been extensively applied in the electronic devices and wireless communication to solve the increasingly serious problems of electromagnetic pollution and radiation. In this work, Fe-MOFs/biomass cotton derived Fe@nanoporous carbon@carbon fiber (Fe@NPC@CF) composites were successfully obtained by means of in-situ synthesis and thermal decomposition processes. It was found that the Fe@NPC composites were uniformly distributed on the carbon fibers matrix. As a result, EM wave absorbing performances were greatly promoted via the synergic effects among Fe nanoparticles , nanoporous carbon and carbon fibers. A strong reflection loss ( RL ) of −46.2 dB and a wide absorbing bandwidth of 5.2 GHz ( RL < -10 dB) with a matching thickness of 2.5 mm were achieved for the Fe@NPC@CF composites with a low filling ratio of 25%. Therefore, this work not only paved the way for development of biomass as a green, low-cost and renewable high-performance carbon-based absorber, but also provided a good design and fabricating concept for the composite materials of EM wave absorber.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 5
·3302-3310
·
IF 1.8
Rongpei Wang,Gang Wang,Songlin Ran,Wei Wang,Yunlong Yang,Yu Zhao,Kaixuan Gui,Rujie He,Caiwang Tan
AlCoCrFeNi 2.1 eutectic high-entropy alloy was introduced to join C f /SiC composite by spark plasma sintering technique. The influence of holding times on microstructure, shear strength and fracture behavior of the joints was studied. When held for 7 min, the typical microstructure of the C f /SiC-AlCoCrFeNi 2.1 -C f /SiC joint was C f /SiC composite → CrSi 2 + FCC + Al 8 Cr 5 + graphite → CrSi 2 + FCC + Al 8 Cr 5 → CrSi 2 + FCC + Al 8 Cr 5 + graphite → C f /SiC composite. As the holding time extended, the Ni–Si and Fe–Si brittle phases in the joint gradually reduced, and the diffusion transition layer continued to thicken. The maximum joint strength was 23.9 MPa, which was obtained at 1450°C for 7 min. Analyzed by scanning electron microscopy and energy dispersive spectroscopy, the fracture modes of the joints joined at different holding times were all brittle fracture.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huaiyu Dong,Shuailong Gao,Chen Yu,Zhichen Wang,Haofeng Zhang,Yixing Huang,Tian Zhao,Ying Li
Traditional microwave absorbing materials struggle to balance wideband absorption with mechanical properties, particularly in multifunctional applications. This study explores the effects of short carbon fibers (CF), cerium dioxide (CeO 2 ), and reduced graphene oxide (rGO) on the electromagnetic and mechanical properties of 3D-printed composites. The ABS@CF/CeO 2 /rGO composite with a thickness of 2.2 mm exhibited exceptional microwave absorption, achieving an effective absorption bandwidth (EAB) of 6.6 GHz and a minimum reflection loss (RL min ) of −40.9 dB. The Whale Optimization Algorithm (WOA) was employed to design a load-bearing, microwave-absorbing superstructure, which significantly improved wideband absorption. Experimental results confirmed the superstructure’s isotropy and wide-angle absorption capabilities. The calculated electromagnetic parameters were applied to evaluate the radar cross-section (RCS) of large targets, demonstrating enhanced stealth performance for unmanned aerial vehicles (UAVs). Mechanical tests revealed that rGO improved interlayer bonding strength, while CF negatively impacted bending performance. The superstructure also showed excellent mechanical stability in load-bearing tests, underscoring its potential for practical engineering applications. This study offers insights into designing advanced composite materials with balanced electromagnetic and mechanical properties, guiding future multifunctional material development.
研究领域:
材料科学
·
电磁学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zanchao Gao,Yumin An,Kailei Xu,Yehong Cheng,Libin Zhao
This study presents a novel fabrication strategy for unidirectional carbon fiber/ceramic films and integrates them with helical assembly, compression molding, and precursor infiltration and pyrolysis to construct a biomimetic Bouligand structure in ZrB 2 -SiC based composites. With a fixed helix angle of 30°, the influence of carbon fiber volume fractions (20 %, 30 %, 40 %) on the mechanical properties was investigated. The C f /ZrB 2 -SiC composites with 40 vol% carbon fiber exhibited the highest mechanical properties. Building upon this result, the effect of different helix angles (15°, 30°, 45°, 60°) on the mechanical properties was further investigated. The C f /ZrB 2 -SiC composite with 40 vol% fiber and a 60° helix angle sample exhibited the best overall mechanical performance, characterized by a flexural strength of 346.9 MPa, fracture toughness of 11.8 MPa·m 1/2 , and work of fracture of 5170.6 J·m −2 . SEM and CT analysis revealed that toughening was primarily attributed to crack deflection, microcracking, fiber pull-out, and bridging mechanisms.
研究领域:
材料科学
·
复合材料
·
机械工程
·
仿生学
·
陶瓷材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Xiaowu Chen,Shaoming Dong,Yanmei Kan,Xihai Jin,Haijun Zhou,Dewei Ni,Dengke Wang
Three-dimensional C f /SiC-ZrC-ZrB 2 composites were fabricated by reactive melt infiltration of ZrSi 2 alloys into porous C f /B 4 C-C preforms prepared through a sol-gel process. The influence of pore structure of the C f /B 4 C-C preforms on microstructure and mechanical performances of the C f /SiC-ZrC-ZrB 2 composites was studied. It was found that the microstructure and mechanical performances of the composites showed a strong dependence on the pore structure of the preforms. Residual ZrSi 2 content in the composites was significantly reduced with the decreases in the porosity and pore size of the C f /B 4 C-C preforms. At the same time, fiber erosion in the composites was also gradually mitigated, which led to a significant improvement in the fracture behaviors of the composite, as failure mode of the composites changed from brittle to pseudo-plastic. When the porosity of the preforms decreased from 53.7% to 31.3%, the flexural strength of the composites increased from 53 MPa to 184 MPa.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Youlin Jiang,Dewei Ni,Bowen Chen,Jun Lu,Feiyan Cai,Xuegang Zou,Chunjing Liao,Hongda Wang,Shaoming Dong
In this work, 3D-C f /HfC-SiC-based composites were fabricated and optimized via reactive melt infiltration (RMI) of Si into porous C f /HfC-C preforms prepared by a sol-gel processing. The physical and chemical processes involved during the fabrication were identified and analyzed in details. It is revealed that fibers and interphase of the composites can be eroded during carbothermal reduction process, which can be further aggravated during RMI, with the formation of Hf-containing substance on the fibers surface. The fibers and interphase degradation is mainly induced by the reactions between HfO 2 and C/SiC interphase layers at elevated temperatures. Accordingly, a two-step carbothermal reduction treatment was proposed for the optimization of the fabrication procedure. As a result, less fiber/interphase erosion and improved mechanical properties are achieved in the composites, with the bending strength increased by ∼49 % (from 214.1 ± 15.7 MPa to 319.0 ± 26.0 MPa).
研究领域:
材料科学
·
复合材料制备
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Dongyang Zhang,Ping Hu,Shun Dong,Cheng Fang,Jiaxin Feng,Xinghong Zhang
The C f /ZrB 2 -SiC composite was successfully fabricated via brushing nano ZrB 2 -SiC slurry followed by low-temperature hot pressing technique, in which the UHTC phases were uniformly introduced into intrafascicular space of the subdivided fiber bundles. The fabricated composite exhibited a non-brittle fracture behavior and excellent mechanical properties with a high work of fracture of 1338 J/m 2 , one order of magnitude higher than that of the ZrB 2 -SiC ceramic, which was attributed to the hybrid toughening mechanisms such as crack deflection, fiber bridging, fiber pull-out and crack branching. The fiber/matrix interfaces were analyzed by the high resolution transmission electron microscopy , and no obvious chemical reaction was detected, suggesting the degradation of carbon fiber was effectively inhibited. Moreover, the C f /ZrB 2 -SiC composite showed a good thermal shock resistance with a thermal shock temperature difference of 764 °C, almost twice those of the ZrB 2 -SiC ceramic. This work provides a facile and effective approach to fabricate high-performance continuous carbon fiber reinforced ceramic composites with uniform component distribution.
研究领域:
材料科学
·
复合材料工程
✓ 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）