Journal of Manufacturing Processes
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2026
·
IF 7.8
Chenyun Qi,Qin Lian,Hu Hou,Shuhao Qi,Chenbo He,Yangtao Wang,Wei Chen,Chuncheng Yang,Jiannan Li,Shuyu Xiang,Fu Wang,Dichen Li
In sectors such as aerospace and precision instruments, ceramic matrix composites are increasingly preferred for developing new lightweight high-temperature components. A critical technological challenge lies in managing their thermal expansion under high-temperature or large-temperature-difference conditions. Traditional single-material or structural approaches struggle to achieve tunable thermal expansion, while metamaterial designs based on materials with different coefficients of thermal expansion (CTE) face complex structural and manufacturing hurdles. Additive manufacturing (AM), particularly vat photopolymerization (VPP) multi-material forming technology, offers a novel pathway for fabricating high-performance tunable thermal expansion metamaterials. This research introduces a methodology for designing, manufacturing, and characterizing near-zero expansion metamaterials made of silicon carbide (SiC) ceramics, ideal for high-temperature or rapid thermal cycling environments. Initially, theoretical models for bending-dominated and tensile-dominated near-zero expansion metamaterials were developed based on two types of SiC-based ceramics with distinct experimental CTEs, yielding optimal theoretical CTEs of 0 ppm/K and 1.6 ppm/K, respectively. Subsequently, by employing our proposed additive manufacturing technique that combines our proprietary dual-material VPP technology with liquid silicon infiltration (LSI) sintering, both metamaterials were precisely produced. High-temperature digital image correlation (DIC) measurements showed that the bending-dominated metamaterial exhibited an effective CTE of 0.76–0.96 ppm/K over the investigated temperature range. In addition, a representative high-temperature DIC measurement of the stretching-dominated metamaterial from 20 °C to 400 °C yielded an effective CTE of 1.53 ppm/K, close to the theoretical value of 1.6 ppm/K. This result demonstrates the near-zero thermal expansion can be programmed into SiC-based ceramic metamaterials through the coupled design of constituent materials, lattice architecture, and deformation mechanism and validates the feasibility of our VPP additive manufacturing with LSI sintering strategy. This study offers solutions for structural design and additive manufacturing to tailor the performance of high-temperature-stable metamaterials, providing valuable insights for developing lightweight, precisely controllable materials for extreme environmental applications.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2026
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IF 8.2
Bingzhu Wang,Wenhao Dou,Huan Guo,Jianjun Sha
To address the challenges of achieving densification at lower sintering temperatures and precise control over the microstructure in UHTCs-SiC, a novel reactive hot-pressing sintering technology was proposed to realize the low-temperature densification of fine and uniform (Zr,Ti)B 2 -(Zr,Ti)C-SiC ceramics, as well as the accurate tailoring of phase compositions. The intrinsic relationship between phase compositions, microstructural tailoring and mechanical performance was revealed. As the molar ratio of (Zr,Ti)C/(Zr,Ti)B 2 decreases, rod-shaped microstructural units (ultra-high temperature borides) progressively develop within the ceramic. These elongated features play a beneficial role in deflecting propagating cracks. When coupled with equiaxed (Zr,Ti)C grains, this combination allows the synergistic strengthening and toughening mechanisms to be fully activated, so the (Zr,Ti)B 2 -(Zr,Ti)C-SiC ceramics with a (Zr,Ti)C/(Zr,Ti)B 2 molar ratio of 1:2 exhibit a flexural strength of 479.2 MPa and a fracture toughness of 3.84 MPa·m 1/2 , which are 62.2 % and 40.7 % higher than those of (Zr,Ti)C-SiC ceramics, respectively.
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POLYMER
·
2026
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IF 5.1
Shufen Han,Xue Ke,Gang Lu,Feng You,Xueliang Jiang,Yanhong Sun,Yunhui Wu,Pei Zhao
Polydimethylsiloxane (PDMS) is an important thermal interface materials in electronic packaging industry with the aid of incorporating thermal conductive fillers. However, the thermal conductivity of PDMS composites is easily affected by outside thermal aging or force field. Herein, hybrid fillers containing boron nitride (BN) and silicon carbide (SiC) or silicon carbide nanowires (SiCNW) were used to construct stable thermal conductive pathways in PDMS matrix under cyclic compression or thermal-oxidative aging conditions. The optimum weight ratio of BN to SiC or SiCNW is 9:1 to obtain high thermal conductivity in PDMS. The thermal conductivity of BN 9 /SiC 1 /PDMS and BN 9 /SiCNW 1 /PDMS composites are slightly decreased by 4.50 and 4.20%, respectively after 64 h of thermal-oxidative aging when the mass ratio of BN to SiC or SiCNW is 9:1. Higher load bearing capacity of BN 9 /SiCNW 1 /PDMS composite can guarantee the good stability of thermal conductivity under cyclic compression. The thermal conductivity of BN 9 /SiCNW 1 /PDMS composite material is increased from 0.96 to 1.12 W m −1 K −1 , with a growth rate of 16.60% after 30 cycles of 1000 N compression, while the thermal conductivity of the BN/PDMS composite is decreased under the same compression conditions. Mechanisms of the cyclic compression effect on the variation of structure and thermal conductivity were proposed. This indicates that BN and SiC hybrid filled polymer composites could maintain high thermal conductivity under thermal-oxidative aging or cyclic compression.
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Micromachines
·
2026
·Vol. 17
·期 3
·307
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IF 3.5
Lijie Wu,Zhijun Chen,Yangting Ou,Jiawen Yao,Hang Zhang,Qiusheng Yan,Jisheng Pan
With the advancement of SiC wafers toward 12 inches and innovations in laser cutting technology, new demands have emerged for SiC grinding techniques—namely, high efficiency, low loss, and low wear ratio. This paper investigates electrochemical-assisted grinding of SiC using a grinding wheel–SiC pair model system, examining the effects of electrolyte type, concentration, voltage, load, and rotational speed on wear behavior. Experimental results reveal that NaCl is the most effective electrolyte among the six candidates tested. In the NaCl system, wear behavior is strongly influenced by the interplay between voltage and rotational speed. At a constant voltage of 3 V, increasing the rotational speed to 600 rpm produces a wear area of 1911.93 μm 2 , while at a higher voltage of 7 V with a lower speed of 200 rpm, the wear area reaches 1301.96 μm 2 , indicating that optimal material removal requires synergistic matching of electrical and mechanical parameters. At 2 wt% NaCl, a sudden change in wear behavior occurs at 6–7 min, indicating a dynamic balance between oxide formation and mechanical removal. Rotational speed shows a turning point at 600 rpm, where the wear mechanism shifts significantly, marking the transition to a synergistically enhanced regime. EDS analysis confirms that Na 2 SO 4 increases surface oxygen content by 54.4% compared to deionized water, demonstrating enhanced electrochemical oxidation. The optimal parameter window for synergistic removal is identified as 1–2 wt% NaCl, 5–7 V, 600 rpm, and 100–150 g. This study provides quantitative insights into the synergistic removal mechanism of SiC, offering a theoretical foundation for developing efficient, low-loss electrochemical grinding technologies.
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高影响因子
Materials Today Communications
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2026
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IF 4.9
Fei-Yue Qin,Li-Na Liu,Jing Duan,Chao Chang,Qian-Fei Ma,Yong-Qiang Qin,Chao-Yang Xin,Li-Ming Wang,Lu-Yao Xu,Liang Li,Wei Zhao
Plunger exposed length was used to tailor SPS processing of SiC ceramics. • Reducing the exposed length lowered resistance and advanced shrinkage onset. • Edge under-sintering was reduced without changing composition or schedule. • Residual edge oxides disappeared when the exposed length was decreased. • The balance between edge densification and center stability was clarified. In this work, SiC ceramics with Al 2 O 3 and CeO 2 sintering additives were prepared by spark plasma sintering (SPS). The exposed length of the upper plunger, H, was adjusted to 15, 12, and 9 mm by changing the relative position of the die assembly. The effect of H on densification, microstructure, and local mechanical properties was investigated. As H decreased from 15 to 9 mm, the initial system resistance decreased by about 19%, the onset shrinkage temperature decreased from 1631 ± 10 °C to 1535 ± 10 °C, and the relative density increased from 95.94% to 98.20%. This change in electrical response is considered to alter the current and Joule heat distribution in the graphite tooling, thereby improving the local sintering condition and liquid-phase-assisted densification near the sample edge. Accordingly, the edge of S-H15 was too porous for valid hardness measurement, whereas the S-H9 edge reached 22.91 ± 0.09 GPa. However, fine pores remained in the center of S-H9, where the hardness decreased to 19.75 ± 0.16 GPa. These results show that plunger exposed length is an important tooling parameter affecting regional densification during SPS of SiC ceramics. Download: Download high-res image (238KB) Download: Download full-size image
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COMPOSITES PART B-ENGINEERING
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2026
·
IF 14
Hao Chen,Jianjun Chen,Qingfeng Zeng,Xichen Wang,Zaheer Hussain,Xinyuan Zhang
SiC f /SiC ceramic matrix composites (CMCs) are prime candidates for hot-section components in next-generation aero-engines due to their exceptional high-temperature strength and low density. However, the rapid and efficient densification of components remains the critical bottleneck that severely hinders their widespread engineering applications. In this work, a rapid nano-infiltration and transient eutectic-phase (NITE) sintering method to fabricate high performance SiC f /SiC composites. By utilizing the internal Joule heating of 3D conductive carbon networks, rapid densification under low pressure was successfully achieved. The influence of sintering aid content on the microstructure and mechanical properties of the composites was investigated. SiC f /SiC composites can be densified with 12 wt% sintering aids within 10 min. The sintering aids are present at the grain boundaries in the form of an Al-Y-O amorphous phase and Y 3 Al 5 O 12 crystals. The extremely short sintering time prevents damage to the fibers and the fiber interfaces, thereby enabling the fabrication of composites with favorable mechanical properties. The optimum flexural strength and fracture toughness of the SiC f /SiC composites are 411.41 ± 37.42 MPa and 13.51 ± 0.84 MPa m 1/2 , respectively. This work can provide new strategies and guidance for the rapid fabrication of various ceramic matrix composites with excellent mechanical properties.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Zhaowen Ren,Wancheng Zhou,Yuchang Qing,Hui Xie,Shichang Duan,Haijun Pan,Xiaoke Lu,Xia Chai,Di Ran,Yingze Zheng
The Al and H 3 BO 3 mixed powder was introduced into the PCS/Xylene precursor solution as in-situ synthesis α-Al 2 O 3 filler by precursor infiltration and pyrolysis (PIP) method. The in-situ synthesis filler can effectively decrease the open porosity of SiC f /SiC composites and give rise to multiple scattering of microwave and dipolar polarization. Therefore, the mechanical and microwave absorption properties of SiC f /SiC composites can be simultaneously enhanced. The effects of in-situ synthesis filler on the morphologies, flexure strength and reflection loss values of SiC f /SiC composites were investigated. With 2 wt% in-situ synthesis filler, the flexure strength of SiC f /SiC composite was 305 MPa and the maximum reflection loss ( RL m ) can reach − 54.68 dB with the effective absorption band (EAB) of 3.51 GHz in the X band. With 5 wt% in-situ synthesis filler, the flexure strength of SiC f /SiC composite was 207 MPa and the RL m was − 30.91 dB. Due to the inefficient infiltration process, the RL m of SiC f /SiC composites with 10 wt% in-situ synthesis filler was only − 27.36 dB. Nevertheless, the flexure strength of that composite was 259 MPa, owing to the dense matrix. Additionally, the flexure strength of SiC f /SiC composite without filler was 148 MPa and the RL m was − 26.40 dB.
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CHEMOSPHERE
·
2022
·
IF 8.943
Siyu Han,Yingchun Song,Tongyao Ju,Yuan Meng,Fanzhi Meng,Mengzhu Song,Li Lin,Mengdan Liu,Jinglin Li,Jianguo Jiang
Municipal solid waste incineration (MSWI) fly ash is classified as hazardous waste and requires proper treatments. Sintering of MSWI fly ash for the production of lightweight aggregate (LWA) is a promising treatment technology , while the dependence on natural bloating clay to produce high quality LWA has limited its wide application. In this study, by using SiC as a bloating agent, normal clay could be used to produce super-lightweight aggregate (bulk density <500 kg/m 3 ) with MSWI fly ash. Effects of SiC addition amount, sintering temperature and duration on LWA performance were studied. The results showed that LWA with SiC addition of 0.1–0.5 wt% had significant expansion at sintering temperature of 1120 °C–1160 °C. The optimal conditions were 0.3 wt% SiC addition and sintering at 1120 °C for 30 min, and the bulk density could reach 212 kg/m 3 with other properties meeting the LWA standard (GB/T 17431.1-2010). Further, the heavy metal leaching toxicity was significantly decreased after sintering and met the MSWI fly ash utilization standard (HJ 1134–2020). The X-ray diffraction results revealed the formation of a complex diopside-based phase after sintering. This study provides a new approach for recycling MSWI fly ash in LWA without dependence on specific clay resources, and makes this technology wider applicability.
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PubMed
高影响因子
Journal of Advanced Ceramics
·
2021
·Vol. 11
·期 1
·120-135
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IF 6.707
Lyu Yang,Du Baihe,Chen Guiqing,Zhao Guangdong,Cheng Yuan,Zhou Shanbao,Lv Qingrong,Zhang Xinghong,Han Wenbo
To further improve the oxidation resistance of polymer derived ceramic (PDC) composites in harsh environments, C f /SiC/SiHfBOC composites were prepared by chemical vapor infiltration (CVI) and precursor impregnation pyrolysis (PIP) methods. The weight retention change, mechanical properties, and microstructure of C f /SiC/SiHfBOC before and after oxidation in air were studied in details. Microscopic analyses showed that only the interface between the ceramics and fibers was oxidized to some extent, and hafnium had been enriched on the composite surface after oxidizing at different temperature. The main oxidation products of C f /SiC/SiHfBOC composites were HfO 2 and HfSiO 4 after oxidation at 1500 °C for 60 min. Moreover, the weight retention ratio and compressive strength of the C f /SiC/SiHfBOC composites are 83.97% and 23.88±3.11 MPa, respectively. It indicates that the C f /SiC/SiHfBOC composites should be promising to be used for a short time in the oxidation environment at 1500 °C.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2019
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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.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Xiaoting Yu,Fengfan Zhu,Boyi Yang,Jiancheng Zhou,Ke Wang,Nan Wang,Naixu Li
This work reported a novel BiVO 4 /SiC/Cu 2 O photocatalyst (BSC), and investigated the microstructure, elemental composition and photoelectrochemical properties of the ternary composite photocatalyst. Compared with pure BiVO 4 , BSC exhibited enhanced levofloxacin hydrochloride (LEF) degradation. The degradation rate of LEF can reach 85.83% within 100 min under the conditions of 25 mg BSC addition, LEF concentration of 10 mg/L and pH of 6.3. Furthermore, a monolithic photocatalyst (BSC@C-wood) was developed by coating BSC on one side of carbonized wood (C-wood), enabling water evaporation and purification. We collected clean water vapor and found that the SiC on C-wood can significantly enhance water purification efficiency due to its excellent photothermal ability. BSC@C-wood provides an alternative approach for the low-cost and high-efficiency treatment of wastewater.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wenxia Sima,Wenlong Pang,Potao Sun,Tao Yuan,Ming Yang,Zhaoping Li,Hefei Wang
Epoxy-based composites with high insulation and thermal conductivity are desirable materials for electronic and electrical applications. However, resolving the tradeoff between insulation and thermal conductivity remains challenging. Based on the functional requirement, we designed and fabricated a cactus-like double-oriented epoxy composite by combining magnetic orientation and ice-templated methods. Semiconducting SiC endowed the composite with field-grading characteristics, thus relieving local electric field stress along the horizontal direction, while BN with high thermal conductivity promoted heat dissipation along the vertical direction. The composite exhibited its highest performance with 15 vol% filler, improving the breakdown voltage and thermal conductivity by 43.7% and 1312% compared with pure epoxy, respectively, outperforming recently developed packaging materials. It is believed that this work offers an efficient strategy for the fabrication of the filler structure and provides insights on the simultaneous enhancement in insulation and thermal conductivity of polymer composites .
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危险品化学品经营许可证（带存储）