JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiabao Zang,Haifeng Li,Qingzhi Zhu,Ziheng Wang,Hubuli Bazaerbieke,Li Sun,Meijie Zhang
There are few reports about the electromagnetic wave (EMW) absorption properties of α−SiC based composites, and almost all of them focus on β−SiC polymorphs. In this study, α−SiC p /α−SiC nw /SiO 2 /C hybrid composites (sample SiC−C1500) with heterostructure α−SiC nanowires (α−SiC nw ) of multiple interfaces 4H−SiC/6H−SiC/SiO 2 /C were successfully prepared using mixed powder (α−SiC+m−SiO 2 +C) as raw material based on the heterogeneous nucleation−growth mechanism, and their microwave absorption properties were investigated. Meanwhile, the samples SiC−V2150 and Si−C1500 were obtained by vacuum calcination (α−SiC+m−SiO 2 +C) at 2150 0 C and carbothermal reduction (Si+m−SiO 2 +C) at 1500 0 C, respectively, and their phase compositions were α−SiC p /C and β−SiC p /β−SiC nw /SiO 2 /C, respectively. The sample SiC−C1500 exhibited excellent EMW absorption properties, with a minimum reflection loss (RL min ) value of −18.37 dB at a thickness of 1.3 mm, and a maximum effective absorption bandwidth (EAB max ) value of 4.9 GHz at a thickness of 1.5 mm. In contrast, the EMW absorption performance of the samples SiC−V2150 and Si−C1500 was obviously poor, which was consistent with the RCS (Radar Cross−Section) simulation results. The formation of α−SiC p /α−SiC nw /SiO 2 /C composites (sample SiC−C1500) containing 4H−SiC/6H−SiC/SiO 2 /C multi-interfaces heterostructure α−SiC nanowires (α−SiC nw ) was analyzed. The excellent EMW absorption performance of SiC−C1500 sample could be attributed to the effective regulation of α polymorphs, nanowire heterostructure, multi−component hybridization. This study supplies a helpful experience and reference for improving the high temperature EMW absorption performance of SiC matrix composites.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qingyuan Cao,Hanqi Qian,Tao Liu,Nan Li,Yudong Huang,Dawei Jiang,Bo Jiang
Polymer-derived ceramics (PDCs) endowed with outstanding mechanical properties, chemical and thermal resistance are highly demanded for applications in extreme environments, whereas their practical applications have constantly been constrained by structural collapse and the brittle nature of ceramics at high temperatures. A novel methodology was proposed to boost the growth efficiency of SiC nanowires by one-step pyrolysis prepared heterostructure promoter in situ during the process of PDCs. The quantity and dispersibility of heterogeneous promoter have been markedly enhanced through one-step pyrolysis. Furthermore, the heterostructure promoter prepared via ligand exchange between ferrocene and Zr atoms exhibited nano-flower structure and greater specific surface area, thereby possessing higher adsorption capacity for reaction intermediates by providing more reaction sites. This was accountable for the enhancement of growth efficiency of nanowires and gave rise to the formation of a crack-free ceramics phase with higher strength, lower brittleness and multifunctionality. The yield of ceramics attained 87.84% under the impact of the heterogeneous promoter. In contrast to other promoter, heterogeneous promoter was capable of promoting a greater number of SiC nanowires with higher aspect ratios and more homogeneous distribution. Furthermore, SiC nanowires featuring core-shell structure were grown in hybrid resin by heterostructure promoter during the process of PDCs. The successful fabrication of this heterogeneous promoter offered a promising perspective for the emerging responsive ceramifiable technology.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jun-Min Zhang,Xiao-Wu Chen,Xiao You,Qing-Gang Li,Meng-Meng Wang,Xiang-Yu Zhang,Yan-Mei Kan,Yu-Dong Xue,Shao-Ming Dong
The effect of RE 2 O 3 (RE = La, Y, Er, Lu) on the oxidation behavior of RMI-SiC ceramics in air and wet oxygen atmospheres at 1400 °C were studied. The outward migration of RE 3+ cations reduces the oxidation resistance of SiC-RE ceramics in air, but improves the wet-oxidation resistance of SiC-RE ceramics due to the formation of denser RE 2 Si 2 O 7 layer. The outward migration rates of RE 3+ cations may be influenced jointly by the RE 3+ cation radius and the formation rate of RE 2 Si 2 O 7 . The higher mobility of Er 3+ and Y 3+ cations makes Y 2 O 3 and Er 2 O 3 promising modifier for enhancing the wet-oxidation resistance of RMI-SiC f /SiC composites, although the modified components need to be optimized and further analyzed in a more realistic service environment.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 3
·035501
·
IF 1.62
Chao Li,Guodong Zeng,Min Zhou,Yang Fang,Zongwu Chen,Yishen Xu,Siyin Ding,Miao Yuan,Hao Li,Shaopeng Wu
Combination of styrene-butadiene-styrene (SBS) polymer and layered double hydroxides (LDHs) has commonly applied in asphalt to improve anti-ultraviolet aging performance, but it can not afford the reparation of cracks caused by aging of asphalt. Also, few researches focused on the structure and performance changes during synthesis of LDHs. Based on self-healing performance of asphalt, the produced cracks can be repaired by microwave heating. Therefore, the controllable synthesis of traditional microwave absorber SiC to wrap LDHs (SwL) at different temperatures was studied in this paper, and the effects of different SBS/SwL combination on the microwave absorption and exothermic properties of modified asphalt were studied. The SwL was firstly synthesized at 200 °C, 350 °C, 500 °C and 650 °C. Then morphology, phase composition, chemical structure of different SwL were evaluated. Finally, based on different combination of SBS and SwL, the effects of SBS/SwL on the microwave absorption in the frequency band from 1 GHz to 18 GHz and exothermic characteristics at 2.45 GHz of the modified asphalt were analyzed. The results show that SwL can be synthesized successfully, and the processing temperature significantly affects the structure of SwL. The SBS/SwL-200 modified asphalt has the best microwave absorption and exothermic properties. When used in self-healing asphalt, it is more advantageous to choose 200 °C as the synthesis temperature of SwL.
研究领域:
材料科学
·
土木工程
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Yuanming Zhou,Shuxin Li,Shuangxing Zhu,Ruizhi Liu,Zhenxiao Tang,Maozhong Yi,Ke Peng
To investigate the influence of (Ta,Zr)C on the ablation resistance of C/C composites, C/C-(Ta 0.5 Zr 0.5 )C-SiC, C/C-(Ta 0.33 Zr 0.67 )C-SiC, and C/C-(Ta 0.2 Zr 0.8 )C-SiC were prepared with different Zr/Ta ratios through high-solid-loading slurry impregnation combined with precursor infiltration and pyrolysis. The flexural performance and ablation resistance both improved with an increasing Zr/Ta ratio. Compared to C/C-(Ta 0.5 Zr 0.5 )C-SiC and C/C-(Ta 0.33 Zr 0.67 )C-SiC, the flexural strength of C/C-(Ta 0.2 Zr 0.8 )C-SiC increased by 74.17 % and 24.29 %, respectively. The mass ablation rate was reduced by 74.33 % and 81.02 %, while the linear ablation rate was reduced by 98.60 % and 97.65 % after 120 s of ablation, respectively. The variations in Zr/Ta ratios affected the formation, integrity, and performance of the microstructure, which was composed of a Zr-rich oxide skeleton combined with Ta-rich oxide binder within the Ta-Zr-O oxide layer on the composite surface, ultimately enhancing the overall ablation resistance of these 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
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Lu Zilong,Yue Jianling,Fu Zeyu,Huang Xiaozhong,Yang Haitang
SiC f /BN/SiC mini-composites comprising single tow SiC fibre-reinforced SiC with chemical vapour deposited (CVD) BN interface layers were fabricated. The mechanical performance and binding strength of the composites and the fibre/interface for the oxidized SiC f /BN/SiC mini-composite samples (oxidation at 1000, 1200, 1300, 1400 and 1500 °C in air for two hours) were investigated by tensile tests and fibre push-out tests, respectively. The value of oxidation mass change was also measured. Some unusual phenomena for the SiC f /BN/SiC mini-composites oxidized at 1000 °C were discovered in this work. The tensile strength reached a maximum value, and the mass gain rate showed as a singular negative value, while the shear strength between the fibre and the matrix was moderate. Scanning electron microscopy, energy dispersive spectrometry, infrared spectroscopy and X-ray diffraction characterization methods were used to reveal the microstructural evolution and investigate the unusual phenomenon during oxidation procedures. This work will provide guidance for predicting the service life of SiC f /BN/SiC composite materials and may enable these materials to become a backbone for thermal structure systems in aerospace applications .
研究领域:
材料科学
·
高温复合材料
·
航空航天材料
·
表面工程
·
结构表征
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Chong Shan,Zhiwei He,Erxi Wang,Xiaohui Zhao,Zhan Sui,Jianjun Cao
A biomimetic superhydrophobic surface was fabricated on single-crystal 4H-SiC using a two-step femtosecond laser processing strategy followed by surface silanization. Drawing inspiration from the micro/nanostructures of butterfly wings and shark skin, a hybrid hierarchical architecture was engineered by first generating microscale grid patterns and then inscribing small grooves within each grid cell. This morphology significantly enhanced surface roughness and provided the structural basis for wettability modulation. Systematic characterization revealed that laser-induced oxidation introduced abundant polar functional groups, resulting in superhydrophilicity, which was subsequently converted into superhydrophobicity (water contact angle ∼ 154°) via octyltriethoxysilane (OTES) modification. The resulting surface exhibited excellent robustness to processing parameters, with superhydrophobicity achieved across a wide range of laser powers (30–110 mW) and grid spacings (50–150 μ m ). EDS and XPS analyses confirmed the transformation of polar oxide species into nonpolar chemical groups following modification. Functional demonstrations showed that the fabricated surface possessed strong self-cleaning and anti-icing capabilities, with water droplets rapidly rolling off to remove contaminants and delaying ice nucleation by over threefold compared to untreated SiC. This work provides a scalable, maskless, and environmentally friendly approach to functionalize SiC surfaces, paving the way for their application in harsh environments such as aerospace, microfluidics, and power electronics.
研究领域:
材料科学
·
应用物理
·
纳米技术
·
表面工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenyan Huang,Zhichao Xue,Lingjie Li,Shengjian Mao,Yufeng Wang,Yeqi Zhu,Tao Luo,Qianwen Tao,Rongqian Yao
Strengthening interface bonding for superior mechanical/ablation performances of SiC-based aerospace vehicle components remains a major challenge. Attractively, polycarbosilane-vinyltriethoxysilane-graphene oxide with addition of TiN/B (PVG(TiN, B)) were successfully synthesized for the first time. An ingenious route via re-pyrolyzing ball-milling-induced SiC(rGO, TiB 2 ) p fillers/PVG(TiN, B) precursors blends was introduced to prepare lightweight SiC(rGO, TiB 2 ) composite polymer-derived ceramics (PDCs). Interestingly, both SiC(rGO, TiB 2 ) p and PVG(TiN, B) pyrolysis products, composed of β-SiC/SiO x C y /C free (rGO, TiB 2 ), are tightly coupled by each other owing to plentiful Si-dangling bonds. In-situ formed intergranular TiB 2 /B 4 C, well compatible with amorphous ceramic network, can prevent β-SiC grain growth, strengthen interface bonding, and even hinder further crack propagation along the grain boundaries. Particularly, samples re-pyrolyzed at 1300 °C possess unique combination of good hardness (5.44 GPa), excellent fracture toughness (4.70 MPa·m 1/2 ), high flexural strength (41.90 MPa) and outstanding compressive strength (126.33 MPa). Improved high-temperature and ablation resistance gives them distinct advantages of interlocked microstructure under exposure of butane flame. As demonstrated, SiC(rGO, TiB 2 ) composite PDCs were developed into porous ceramics with good thermal insulation , focusing on manufacturing large-size bulk PDCs for thermal protection system of hypersonic vehicles.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ruyi Sha,Bingzhu Wang,Jixiang Dai,Jianjun Sha
Ceramic aerogels are promising high-temperature thermal insulation materials due to their outstanding thermal stability and oxidation resistance. However, restricted by nanoparticle-assembled network structures, conventional ceramic aerogels commonly suffer from inherent brittleness, volume shrinkage, and structural collapse at high temperatures. Here, to overcome such obstacles, 3D ultralight and highly porous carbon tube foams (CTFs) were designed and synthesized as the carbonaceous precursors, where melamine foams were used as the sacrificial templates to form the hollow and thin-wall network structures in the CTFs (density: ∼4.8 mg cm–3). Then, the arbitrary-shaped silicon carbide (SiC) nanofibrous aerogels (SNFAs) were obtained through a simple chemical vapor deposition (CVD) process on the CTFs. The resulting SNFAs exhibited excellent comprehensive performances: ultralow density (4.2 mg cm–3) and thermal conductivity (21.3 mW m–1 K–1 at room temperature), excellent rigidity (specific modulus: 13.2 kN·m kg–1), and resilient compressibility. The SNFAs could support over 2100 times their weight without visible deformation. Furthermore, the SNFAs also showed exceptional high-temperature thermal stability, which means that they could withstand 1100 °C in an air atmosphere and 1550 °C in an inert atmosphere. These superior comprehensive performances enable SNFAs to be suitable for thermal insulation in harsh environments.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Wenyan Huang,Jiahao Liang,Kaiqi Chen,Ying Yu,Yeqi Zhu,Junhui Li,Cheng Pan,Yipeng Guo,Siqi Lan,Rongqian Yao
With ongoing development of rocket combustion and hypersonic vehicles, urgent needs are created on thermal structures, protection and thermal insulating materials, particularly balanced enhancement of mechanical and antioxidant properties. Herein, we propose a design strategy to construct continuous in-situ formed SiOC nanowires (SiOCnws)-toughened self-healing SiO x coatings into porous SiC(rGO) PDCs. The key production technique is re-pyrolyzing coassembled flexible precursors/SiC(rGO) p /graphite blends, followed by decarbonization and silica sol impregnation-sintering (SIS) process. Well-distributed hierarchical pores are built to heighten thermal insulation properties by the integrated decarburization of graphite coupled with free carbon. High-yield SiOCnws, with high surface activity, are first cultivated via graphite-assisted vapor-solid (VS) mechanism without transition metal catalysts. They interconnect to form intricate 3D meshwork by graphite-assisted melt-spinning and have good compatibility with ceramic matrix and SiO x coatings by carbothermal reaction. Hierarchically porous SiOCnws/SiC(rGO) 40 % PDCs after once SIS exhibit favorable thermal conductivity of 0.27 W‧m −1 ‧K −1 and exceptional high robustness (compressive strength: 39.02 MPa, hardness: 10.27 GPa). Such composites display low reflection loss of −48.14 dB at 11.22 GHz and even good structural stability at about 1300 °C as burned by a butane blowtorch for 3600 s, shedding light on competitive components for uses in thermal protection fields.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zhige Zhang,Guofeng Zhao,Wenyang Li,Jiawei Zhong,Jun Xie
The efficient conversion of renewable biogas has attracted ever-increasing interest in past decades. Ni-CeO 2 -Al 2 O 3 supported on monolithic SiC-foam (denoted as Ni/CeO 2 -Al 2 O 3 /SCF) is designed and applied in biogas reforming. The monolithic Ni/CeO 2 -Al 2 O 3 /SCF catalysts were deeply characterized by XRD, ICP-AES, SEM, HR-TEM, CO 2 -TPD, etc. The cycle between CeO 2 -Al 2 O 3 and CeAlO 3 was verified by in-situ CH 4 /CO 2 -TPSR, and the catalytic role of CeAlO 3 in coke elimination and CO 2 activation was further confirmed. Due to the uniform distribution of Ni nanoparticles (NP S ) and the activation of CO 2 by CeAlO 3 , Ni/CeAlO 3 -Al 2 O 3 /SCF shows excellent catalytic stability to inhibit sintering and eliminate carbon deposition. At 900 °C and a gas hourly space velocity (GSHV) of 24000 mL g Cat -1 h −1 , excellent CH 4 /CO 2 conversion of 86/99% are initially achieved over Ni/CeAlO 3 -Al 2 O 3 /SCF catalyst, followed by slight decrease after 140 h, and remain basically stable for the next 260 h.
研究领域:
化学工程
·
能源科学
·
催化材料
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Bocong Zou,Yang Yang,Hulin Wang,Weijun Li,Lin Wang,Fengmei Gao,Dongdong Zhang,Marko Gloginjić,Marko Erić,Srdjan Petrović,Weiyou Yang,Huan He,Shanliang Chen
In the realm of photodetector (PD) technology, photoelectrochemical (PEC) PDs have garnered attention owing to their inherent advantages. Advances in this field depend on functional nanostructured materials, which are pivotal in improving the separation and transport of photogenerated electron–hole pairs to improve device efficiency. Herein, a highly photosensitive PEC UV PD is built using integrated self-supporting SiC/ZnS heterojunction nanowire array photoelectrodes through anodization and chemical deposition. Compared with the original SiC nanoarrays, the optimized SiC/ZnS-25 nanoarrays exhibit high photocurrent density ( D ph , 809.2 µA cm −2 ), rapid rise/decay times ( τ r / τ d , 4/21 ms), high responsivity ( R λ , 1.226 A W −1 ), remarkable detectivity ( D * , 2.517 × 10 11 Jones), and large external quantum efficiency ( EQE , 40.57%) under 375 nm UV light with a bias voltage of 0.6 V. Furthermore, SiC/ZnS-25 delivers excellent self-powered performance, with R λ , D * , and EQE reaching 0.91 A W −1 , 1.69 × 10 11 Jones, and 30.24%, respectively. In addition, the device exhibits excellent long-term operation and aging stability under a bias voltage of 0.6 V and under self-powered conditions. The excellent photodetection behaviors of the SiC/ZnS PEC PD are mainly ascribed to the synergistic effect of the novel well-aligned nanowire geometry, heterojunction with ZnS nanofilms of optimal thickness, and integrated self-supporting configuration of the photoelectrode.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）