Smart Materials and Structures
·
2022
·Vol. 31
·期 3
·035021
·
IF 4.131
Da Hu,Jiayun Deng,Jiabin Lu,Qiusheng Yan,Canlin Du,Jiyang Cao
Magnetorheological elastomers (MREs) are widely used in vibration control due to their excellent magneto-controlled mechanical properties. In this research, polyurethane-based MRE polishing pads were prepared and used for the polishing of single-crystal SiC to investigate the magneto-controlled mechanical properties, the magneto-polishing effect, and the mechanism of action thereof. The results show that the pre-structuring process is affected by parameters such as mass fraction and particle size of magnetic particles in MREs and curing magnetic field strength, different chain strings that demonstrate different magnetorheological effects are formed. The greater the mass fraction of magnetic particles and curing magnetic field strength, the more the MREs exhibit magnetorheological effects, especially so when the magnetic particles size of 3 μm. A series of 90 min polishing experiments on single-crystal SiC with original surface roughness (Ra) 80 nm were conducted using an MRE pad. The results indicate that with the increase of polishing magnetic field strengths, the shear modulus of MRE polishing pads increases, the material removal rate (MRR) of the polishing process increases and Ra decreases. As the magnetic field strength is increased from 0 mT to 335 mT, the shear modulus is increased from 1.392 MPa to 1.825 MPa (an increase of 31.1%), while MRR is increased from 706.3 nm h−1 to 835.3 nm h−1 (an increase of 18.3%), Ra is decreased from 19.92 nm to 3.62 nm (an improvement in surface quality of 81.8%). The results show that the increase of the polishing magnetic field strengths changes the material modulus of the MRE polishing pads, which cause the decreases in the compressive and shear elastic deformation of the abrasive grains on the elastic substrate. This increases the positive pressure of the abrasive grains on the SiC wafer, which enhances the material-removal ability of the SiC wafer, thereby improving the surface quality of the wafer.
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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 .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Xiangyu Han,Hong Chen,Zuozhu Yin,Yuhua Chen,Zhen Hong,Yidan Luo,Mingshan Xue
Epoxy resins are widely used in microelectronic packaging for wearable devices due to their excellent insulating properties and superb chemical stability. However, the performance of epoxy resins in high-temperature and humid environments is hindered by moisture condensation, which reduces thermal conductivity and may lead to the failure of electronic components. Herein, we propose a dual bio-inspired composite membrane based on ZnO/SiC/epoxy resin. It synergistically integrates high thermal conductivity, which is more than 50 % higher than pristine epoxy resin, and superior superhydrophobicity, with a water contact angle: 160° ± 1°. Addressing a critical gap in multifunctional thermal management materials, unlike previous studies that focused on a single function, such as vertically aligned boron nitride (BN) composites for thermal conductivity or ZIF-8/POTS coatings for hydrophobicity, this study innovatively combines polyurethane-modified ZnO and SiC with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS) to achieve dual functionality. POTS-modified ZnO/SiC coatings form layered micro/nano-roughness and low surface energy through covalent Si-O-Si and C-F bonding, outperforming conventional physically roughened surfaces. The cost-effective coating method replaces complex layer-by-layer deposition, ensuring uniform dispersion and industrial viability. This work not only addresses the trade-off between thermal management and environmental resilience, but also pioneers a scalable strategy for next-generation electronics packaging, especially for 5 G and wearable technologies. By demonstrating synergistic material design and proven long-term stability, this research sets a benchmark for the use of multifunctional composites in demanding operating environments.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Kailei Xu,Yumin An,Zanchao Gao,Yehong Cheng,Libin Zhao
A method combining low-temperature demolding with precursor infiltration and pyrolysis (PIP) for preparing C f /SiC-ZrB 2 ceramic composites with bouligand structure is proposed. First, C f /SiC-ZrB 2 -PCS ceramic films were prepared using polycarbosilane (PCS), carbon fiber, and SiC-ZrB 2 ceramic particles through liquid nitrogen demolding technology. Then, C f /SiC-ZrB 2 green body with bouligand structure was achieved by helically assembled and pre-crosslinked C f /SiC-ZrB 2 -PCS ceramic films at a fixed angle. Finally, precursor infiltration and pyrolysis method was employed to densify the C f /SiC-ZrB 2 ceramic composites with bouligand structure using PCS. The mechanical properties of the composites with different carbon fiber contents were investigated, revealing that at a carbon fiber content of 30%, the composites exhibited a flexural strength of 358.9 MPa, a fracture toughness of 10.4 MPa·m 1/2 , and a work of fracture of 2445.4 J·m -2 . The toughening mechanism of C f /SiC-ZrB 2 ceramic composites with bouligand structure was elucidated through two-dimensional crack propagation analysis via scanning electron microscopy (SEM) with three-dimensional fracture network reconstruction using synchrotron X-ray computed tomography (CT).
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70374
·
IF 3.8
Ruiji Zhang,Wenchen Zhang,Desheng Liu,Dawang Yang,Qixiang Zhang,Yang Lin,Aunm Javid,Xiaofeng Zhao,Xiaoyu Chong,Fei Pan,Qing Wang,Fangwei Guo
Although ZrB 2 ‒SiC (ZS) ceramics have been extensively researched for reusable space vehicles, the gaseous Si-bearing oxides are actively yielded, which limits their service for ultra-high-temperature applications (>2000°C). In this work, medium-entropy oxide spiral fibers (MEO sf ) with a composition of Zr 0.68 Y 0.07 Ce 0.2 Ti 0.05 O 2‒ δ (Zr 0.68 ) were developed to promote the generation of oxide scale. The MEO sf -ZS composites demonstrated a low ablation rate of 0.27 µm/s when exposed to ten 60 s cycles of oxyacetylene flame at 2150°C. The first-principle calculations revealed that the MEO-Zr 0.68 exhibited minimum lattice distortion in the ferroelastic tetragonal ( t ) phase and a highly integrated crystal orbital overlap of the Ti–O bond, which contributed the good phase stability at high temperature. The enhanced ablation resistance of MEO sf -ZS was ascribed to the outstanding t -phase stability and structural integrity of the oxide scale. The intact MEO-glassy SiO 2 oxide scale formed by capillary resistance effect of spiral geometry finally retarded the active oxidation of SiC grains.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Runchao Dong,Bartosz Orwat,Beata Luszczynska,Jia Zhang,Hongxin Yin,Genqiang Liu,Weijun Li,Dongdong Zhang,Zhentao Du,Weiyou Yang,Huan He,Fengmei Gao,Shanliang Chen
Controlling the interface properties and surface carrier dynamics of nanostructured semiconductors is crucial for enhancing the electrical and optical performance of photoelectrochemical (PEC) photodetectors (PDs). Herein, a novel self-powered PEC ultraviolet (UV) PD applicable to harsh underwater environments is developed based on integrated self-supporting SiC/GaN heterojunction nanowire arrays. Whole single-crystal integrated self-supporting SiC nanoarrays are encapsulated by high-quality GaN films via two-step anodization and high-temperature nitridation processes. The optimized heterojunction nanoarrays PEC UV PD with 40 min nitridation duration (SiC/GaN-40) demonstrates outstanding photodetection capabilities with high responsivity ( R λ , 698 mA/W), excellent detectivity ( D ⁎ , 1.66 × 10 11 Jones), remarkable external quantum efficiency ( EQE , 231.2 %), and rapid rise/decay times ( τ r / τ d , 127.93/214.92 ms) under 375-nm light illumination at 0.6 V bias voltage. Moreover, the SiC/GaN-40 device demonstrates excellent self-powered performance, achieving exceptional R λ , D ⁎ , EQE, and τ r / τ d , of 588.24 mA/W, 9.3 × 10 10 Jones, 194.9 %, and 160/199 ms, respectively. Furthermore, the device exhibits excellent long-term operational and aging stability even under harsh underwater environments, such as pH-universal and wide-temperature solutions. This study provides a valuable reference for exploring high-responsivity and reliable PEC PDs suitable for harsh underwater optical communication, thus advancing the heterojunction and interfacial engineering strategies for next-generation optoelectronics.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 16
·118672
·
IF 6.3
Xiaoyang Jiao,Anwei Xu,Changbai Long,Mingcong Qing,Fenglong Li,Kuntong Zhang,Lei Hu,Xiangdong Ding,Jun Sun
SiC whiskers (SiC w ) and Y 2 O 3 reinforced (Hf 0.5 Zr 0.5 )C ceramics are designed to realize superior oxidation and ablation resistance at 2500 °C. MoSi 2 , TaSi 2 , and SiB 6 (with varying SiC w contents) are further introduced as sintering aids and modifying components to enhance density and improve ablation resistance. The introduction of SiB 6 leads to higher oxidation and ablation resistance due to the in-situ formation of borides with high thermal conductivity. The borides and SiC jointly serve as rapid heat transfer pathways, facilitating the release and mitigation of thermal stresses during ablation. Meanwhile, an appropriate amount of SiC w serves as toughening and high-temperature self-healing phases, while Y 2 O 3 suppresses the crystalline transformation. Thus, a dense and stable oxide layer is developed during ablation. Therefore, the designed SiC w -Y 2 O 3 -SiB 6 -(Hf 0.5 Zr 0.5 )C exhibits near-zero damages under a 1050 s ablation at 2500 °C, with mass and linear ablation rates of −0.220 μm/s and −0.071 mg/(cm 2 ·s), respectively.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Feihong Li,Lei Zheng,Zhanjun Liu,Mingyu Zhang,Qizhong Huang
This work delves into the fascinating transformation from organic precursors to dense SiC-modified (Ti, Zr, Hf)C solid solution ceramics. Nanocrystalline powder was crafted through an innovative sol-gel process coupled with carbothermal reduction, followed by spark plasma sintering (SPS) to obtain the multi-phase ceramics. The results indicate that the addition of silicone alkoxide is required for forming a robust multi-phase gel network, which facilitates the formation of oxide intermediates (e.g., ZrSiO 4 , HfSiO 4 ), accelerates phase transformation, and inhibits grain from coarsening by encapsulating Ti/Zr/Hf compounds while reinforcing grain boundaries. After pyrolysis at 1400 °C, the precursors gradually evolved into a highly crystalline, medium-entropy solid solution. The optimal sintered composite achieves a relative density of 97.8 % and an open porosity of 0.4 %. The mechanical properties were improved by induced lattice distortion and effect of fine-grained strengthening with the incorporation of SiC. Nanoindentation tests reveal that the hardness and elastic modulus of the (Ti, Zr, Hf)C-SiC composite reach 22.39 GPa and 342.78 GPa, respectively.
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高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2022
·
IF 6.044
Y. Xing,N.Y. Li,C.J. Li,P. Gao,H.D. Guan,C.M.Y. Yang,C.J. Pu,J.H. Yi
SiC particles (SiC p ) reinforced Al matrix composites as the one of the most representative ones in the field of metal matrix composites , and many researches about the enhancement effect of SiC p size on mechanical properties of SiC p /Al composites have mainly focused on the comparison of micron-sized and nano-sized SiC p . In this paper, low-cost submicron-sized SiC p with rare attention was used as novel reinforcements, and the enhancement effect was compared with that of nano-sized SiC p . At the same time, a strategy of oxidation treatment for SiC p is developed in the field of powder metallurgy , and related work has been carried out. Raw submicron-sized SiC p (hereafter named SiC smp ) and raw nano-sized SiC p (hereafter named SiC np ) were calcined at 1100 °C. Then, SiC smp (raw and oxidized) and SiC np (raw and oxidized) were used as reinforcements to prepare Al matrix composites with different reinforcement content by powder metallurgy. The enhancement effect of raw SiC np is slightly better than that of raw SiC smp when the content is below 7 vol%. Although the agglomerations of oxidized SiC p were found owing to increased agglomeration tendency after oxidation treatment for SiC p , the tensile strength of composites were enhanced significantly, especially for SiC np /Al composites. Furthermore, the ductility of SiC smp /Al composites was also improved after calcining for SiC smp and thus excellent comprehensive mechanical properties were obtained.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Wei Guo,Jing Hou,Tiesong Lin,Peng He
This study focused on joining high volume fraction SiC particles reinforced aluminum matrix composites (55 vol% SiC p /Al) with 50SnO–20ZnO–30P 2 O 5 (SZP) glass directly in air. Prior to joining, various properties of the SZP glass and its wettability on the composites were investigated. The results showed that the coefficient of thermal expansion of the glass was 10.58 × 10 -6 /°C (20–369 °C), which closely match with 55 vol% SiC p /Al composites. The glass transition, crystallization, and softening temperature were identified to be 369, 397, and 486 °C, respectively. Subsequent wetting tests confirmed excellent wettability of the glass on the composites. The joint exhibited sound bonding that was free of defects when brazed at 550 °C for 10 min Zn 2 P 2 O 7 was formed adjacent to the composites due to the crystallization of the glass. The mechanical properties of the joint were proven to be suitable, exhibiting an average shear strength of 55.3 MPa.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Jing He,Hua Wang,Qiqi Qu,Zheng Su,Tengfei Qin,Yunsheng Da,Xingyou Tian
Graphene oxide (GO) has been widely used in modern electronic packaging materials because of its excellent performance. Nevertheless, inherently electrical conductivity and hygroscopicity of GO would greatly reduce the reliability of polymer composites as electronic packaging materials. In this work, different ratio GO and functionalized silicon carbide (SiC) particles formed an effective thermal conduction path through electrostatic self-assembly in epoxy resin (ER). SiC particles also played a critical role in enhancing the reliability of epoxy composites due to hydrophobicity and poor electrical properties. The obtained composites, at the optimal ratio of GO and SiC particles of 1:100, exhibited a high thermal conductivity (0.91 W/(mK)). The composites also presented that the thermal conductivity and electrical insulating were not destroyed after 40 h of wet-heat treatment. This strategy provided an insight into the design of high-performance composites with the potential to be used in advanced electronic packaging.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Nannan Zhu,Lijuan Zhang,Guangwu Wen,Yongzhao Hou
The mechanism of SiC whiskers-enhanced polymer-derived ceramics prepared by digital light processing (DLP) was investigated. The results showed that the introduction of SiC whiskers can significantly improve the mechanical properties of SiCO ceramic. When the content of SiC whiskers in the precursor photosensitive resin varied from 0 to 5 wt%, the bending strength of samples increased from 44.2 ± 4.1 MPa to 260.1 ± 49.7 MPa, and the fracture toughness improved from 1.48 ± 0.03 MPa·m 1/2 to 3.23 ± 0.12 MPa·m 1/2 , respectively. The Weibull modulus of the precursor composite ceramics prepared by DLP technology was 10.45. The mechanisms of SiC whisker toughening of SiCO ceramics mainly include fracture and pull-out of the whisker, deflection, bridging of cracks, the directional distribution of whiskers, and compressive stress of the SiC whisker on the ceramic matrix. This work will have important guiding significance for the industrial application of additive manufacturing precursor composite ceramics.
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高影响因子
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