JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
·
2025
·
IF 4.2
Zhuohui Liang,Bin Zhang,Wanying Yue,Siqi Zhang,Yuanchen Xia,Boqiao Wang,Wenbin Zhu,Jinnan Zhang
To achieve effective suppression of hydrogen-air deflagration, a new deflagration-suppressing material PA@SH-SiC is formed by grafting a phosphorus-containing compound, phytic acid (PA), onto the surface of porous silicon carbide (SiC) using a self-assembly technique. Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) results show that PA is successfully and uniformly grafted onto the SiC substrate. In a semi-open duct with dimensions of 130∗130∗820 mm, the effects of two deflagration-suppressing materials, SiC and PA@SH-SiC, are being investigated under three pore sizes (30, 40, 50 PPI) and two thicknesses (20, 40 mm), in response to hydrogen-air deflagration at different equivalence ratios (0.3, 0.4, 0.5). Experimental results show that PA@SH-SiC exhibits superior performance in hydrogen-air deflagration compared to using porous SiC alone, reducing explosion overpressure and flame propagation velocity while minimizing flame distortion. PA coating enhances the chemical suppression effect of SiC by generating HOPO and other groups through endothermic decomposition, which absorb critical radicals like H, O, and OH, thereby weakening chain reactions. Under equivalence ratios of 0.3 and 0.4, porous SiC with 50 PPI effectively blocks most of the flame, reducing explosion overpressure and flame propagation velocity. However, 30 and 40 PPI porous SiC exacerbate deflagration. With a pore size smaller than hydrogen's MESG, 50 PPI porous SiC predominantly exhibits quenching effects, thus suppressing deflagration under equivalence ratios of 0.3 and 0.4. At 30 and 40 PPI, the pore size of porous SiC is too large, resulting in insufficient quenching capability. Instead, the disturbance caused by this leads to elongation and wrinkling of the flame, thereby intensifying the downstream gas deflagration. Taking the 0.4 equivalence ratio conditions as an example, increasing the thickness of 50 PPI porous SiC enhances deflagration suppression. Conversely, increasing the thickness of 30 PPI SiC from 20 mm to 40 mm increases Flame propagation velocity peak (V max ) by 6.3 m/s and overpressure peak (P max ) by 2.82 kPa. This is due to under the conditions of 30 and 40 PPI, increasing the thickness is equivalent to increasing the volume blocking ratio of obstacles, thereby exacerbating the deflagration effect. In addition, under different equivalence ratios, there are differences in the energy release and reaction rates of combustion, which directly affect the deflagration suppression performance of the porous materials.
研究领域:
材料科学
·
燃烧与爆炸学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2016
·
IF 2.647
Lei Chen,Yujin Wang,Jia-Hu Ouyang,Xiaoming Duan,Yu Zhou
A novel pressure-assisted transient viscous phase sintering process has been used to fabricate dense BN-ZrO 2 -SiC composites at relatively low sintering temperatures . The sintering behavior and densification mechanism of BN-ZrO 2 -SiC composites incorporated with B 2 O 3 as transient viscous phase have been investigated. A rapid densification process occurs at about 1300 °C, which is attributed to the in-situ formation of SiO 2 by chemical reactions among ZrO 2 , SiC and B 2 O 3 . BN-ZrO 2 -SiC composites sintered at 1300 °C under 100 MPa exhibit a relative density of 95.9%, a flexural strength of 242 MPa and a fracture toughness of 4.1 MPa m 1/2 .
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wencai Dong,Chonggao Bao,Hao Li,Rongzhen Liu,Shijia Li,Haiqiang Ma
To improve the print quality of SiC ceramic, an amorphous SiO 2 layer is prepared on the surface of SiC by oxidation (SiC@SiO 2 ). The changes in curing depth and width direction of SiC@SiO 2 curing sheets with different degrees of oxidation were investigated. The results showed that curing depth increased while curing width decreased with an increasing degree of oxidation. The edge morphologies of SiC@SiO 2 curing sheets changed from serration to flat shape with increasing degree of oxidation, and uneven overcuring regions appear in the width direction. Additionally, 12% SiC@SiO 2 ceramic was fabricated via vat photopolymerization combined with reaction sintering . The dimensional deviation ratio of printed green bodies increased with decreasing printed line width and pore diameter. The minimum printed line width of 329 μm and pore diameter of 483 μm with good print quality were obtained. Furthermore, the flexural strength of 225.4 MPa and bulk density of 2.77 g cm −3 for sintered 12% SiC@SiO 2 parts were obtained.
研究领域:
材料科学
·
增材制造
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Limeng Song,Bingbing Fan,Yongqiang Chen,Hailong Wang,Hongxia Li,Rui Zhang
Multifunctional high-level performance electromagnetic wave (EMW) absorbing materials is receiving increasing attention with the rapid development of modern information technology. However, current EMW absorbing materials usually have single function and poor thermal and chemical stability, which seriously hinders the practical application of these materials. Herein, to broaden the application fields of the EMW absorption materials, a multifunctional SiC nanofiber aerogel (SiC NFA) was prepared by using chemical vapor deposition (CVD) technology in this work. The as-synthesized SiC NFA exhibits a quite low density (∼9 mg cm −3 ), excellent mechanical performance, high fatigue-resistant, satisfactory refractory property, high temperature thermal stability and good thermal insulation performance. Moreover, the oil-modified SiC NFA has a dramatic hydrophobicity , resulting in a good self-cleaning performance. This SiC NFA also achieves a superior EMW-absorbing property with a minimum refection loss (RL min ) value of −39.37 dB at 7.04 GHz when its thickness is 1.9 mm. These inspiring findings lay a foundation for the subsequent development of multifunctional EMW absorbents.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Tao Feng,Wanbo Hou,Mingde Tong,Hejun Li,Hongjiao Lin,Shifeng Wen
SiC nanowires (SiC nws ) modified SiC f /HfC-SiC composites were prepared by precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI) methods. The microstructure, flexural strengths, impact and impact-ablation tests of the composites with and without SiC nws were investigated. The results showed that after introducing SiC nws , not only the retention rate of HfC ceramic produced by PIP was increased obviously, but also the fracture displacement of the modified composites was reduced due to the enhancement effect of SiC nws at interface between SiC fiber and matrix. After impact and impact-ablation, the strength retention of SiC nws modified composites was 91.6 % and 69.1 % respectively, higher than that of the composites without SiC nws (85.2 % and 54.8 %). As the impact resistance of the modified composites was improved by the pull-out and bridging of SiC nws , the ablation resistance of the impacted composites was enhanced as well.
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 Natural Gas Chemistry
·
2011
·
IF 1.345
Huiling Li,Yonggen Lei,Ying Huang,Yueping Fang,Yuehua Xu,Li Zhu,Xin Li
The Cu 2 O/SiC photocatalyst was obtained from SiC nanoparticles (NPs) modified by Cu 2 O. Their photocatalytic activities for reducing CO 2 to CH 3 OH under visible light irradiation have been investigated. The results indicated that besides a small quantity of 6H-SiC, SiC NPs mainly consisted of 3C-SiC. The band gaps of SiC and Cu 2 O were estimated to be about 1.95 and 2.23 eV from UV-Vis spectra, respectively. The Cu 2 O modification can enhance the photocatalytic performance of SiC NPs, and the largest yields of methanol on SiC, Cu 2 O and Cu 2 O/SiC photocatalysts under visible light irradiation were 153, 104 and 191 μmol/g, respectively.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Shuang Mu,Qin Ma,Yu Zhang,Xu Shen,Chunjing Liao,Xiangyu Zhang,Yusheng Ding,Shaoming Dong,Jinshan Yang
In this work, the Yb 2 Si 2 O 7 interphase was prepared on SiC fibers using the sol–gel method. The influence of sol concentration on the morphology of the interphase was discussed. After heat treatment in argon at 1200°C for 1 h, the Yb 2 Si 2 O 7 was grown in situ on the fiber surface, forming an interphase layer. Then, SiC f /Yb 2 Si 2 O 7 /SiC minicomposites were prepared by chemical vapor infiltration (CVI). The Yb 2 Si 2 O 7 interphase exhibited no changes throughout the high-temperature preparation process and maintained stability and compatibility with the fiber and matrix. The tensile strength of SiC f /Yb 2 Si 2 O 7 /SiC minicomposites with Yb 2 Si 2 O 7 interphase was significantly higher than SiC f /SiC minicomposites without interphase. The crack deflection, interfacial debonding, and fiber pullout were observed in the tensile fracture of the SiC f /Yb 2 Si 2 O 7 /SiC minicomposites.
研究领域:
材料科学
·
机械工程
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 14
·2200333
·
IF 6.389
Xiaoyan Yuan,Huanhuan Li,Aiming Sha,Shengyan Huang,Bo Li,Shouwu Guo
Materials with 1D structure exhibit a remarkable advantage for losing electromagnetic (EM) wave energy. Herein, flexible Mo 2 C-modified SiC/C nanofibers (Mo-SiC/C NFs) are synthesized for the first time by co-electrospinning and subsequent high-temperature pyrolysis, using polycarbosilane (PCS) and molybdenum acetyl acetone (MoO 2 (acac) 2 ) as precursors. It is found that the polymer derived temperature of PCS is significantly decreased by introducing MoO 2 (acac) 2 , as well as endowing the SiC/C NFs with good flexibility, high crystallinity, and remarkable microwave absorption performance. The as-prepared fibers dispersed in paraffin with a low filler loading (15 wt%) exhibit a minimum reflection loss (RL, dB) of -62.5 dB, and a wide effective absorption bandwidth (EAB, RL<-10 dB) of 6.8 GHz at 2.75 mm. Meanwhile, the EAB of the hybrid can cover the whole X-band and most of the C-band by modulating its thickness. These high-efficient performances mainly originate from the specific 1D microstructure, abundant interfaces and defects, and synergistic effect among SiC, Mo 2 C, and C matrix. Thus, this work offers a way to explore flexible SiC/C NFs as a promising candidate with lightweight and wide EAB for EM wave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Ping Ping Zhang,Hong Sheng Wang,Ling Li,Lai Lv,Qing Li Zhang
The vacuum-sintering technology was adopted to prepared Si3N4-SiC composite ceramic, a type of Radar Wave-Absorbing materials (RAW). The mechanical performances of the composite materials were tested and the influences of SiC powers on the mechanics performances and microstructure of Si3N4 ceramics were investigated. The results show that the sintering density, the content of size ofβ-Si3N4 and the strength of Si3N4-SiC all decrease along with the increase of SiC powers in sample, compared with the pure matrix Si3N4 .Meanwhile, Relationship between SiC content and relative permittivity of Si3N4-SiC within the frequency range of 8.2–12.4 GHz (X-band) was studied. The average of relative permittivityεof Si3N4-SiC increased from 7.878 to 13.88 and the average of dielectric loss tanδincreased from 5.6×10-3 to 0.7869 when the content of SiC increased from 0 to 15 wt.%. The excellent microwave absorbing abilities of Si3N4–SiC ceramic were attributed to the interfacial polarization at interface between Si3N4 and SiC and at grain boundary between SiC nanocrystals.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 3
·1362-1372
·
IF 2.956
Shunjie Deng,Chi Jiang,Tianwei Liu,Yin Hu,Jingjing Ding,Maobing Shuai
Al 2 O 3 -Y 2 O 3 -SiC composite coatings were prepared on depleted uranium by cathode plasma electrolytic deposition in Al(NO 3 ) 3 , Y(NO 3 ) 3 , SiC nanoparticles and anhydrous ethyl alcohol mixture. The resulting coating consisted of an inner barrier layer and an outer porous layer. The SiC nanoparticles were incorporated into the composite coating and decreased the coating porosity by filling the pores. The potentiodynamic polarization test and neutral salt spray test revealed that the corrosion resistance of depleted uranium was enhanced by the composite coating. Moreover, with increasing the content of SiC nanoparticles in the coating, the coating corrosion resistance was improved gradually.
研究领域:
材料科学
·
表面工程
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 4
·1281-1291
·
IF 5.693
Du Bin,Zhang Dongyang,Qian Junjie,Cai Mei,He Chao,Zhou Peng,Shui Anze
Obtaining multifunctional materials with desired properties for astronautics is a challenge. In this work, carbon nanofiber (CNF) and SiC-CNF aerogel films are fabricated using bacterial cellulose as scaffolds, which offer industrial-scale production and excellent mechanical strength and stability. The produced aerogel films demonstrate excellent microwave absorption and low thermal conductivity properties. Further, the microwave absorption properties of the aerogels were significantly enhanced due to the proper impedance matching and interface polarizations following the in situ growth of SiC nanowires. In consequence, SiC-CNF aerogel films show enhanced electromagnetic wave absorption, including the minimum reflection loss of −53.3 dB and low thermal conductivity of 0.046 W/m·K at 200 °C. Our work can provide new insight into the fabrication of multifunctional ceramic aerogels for critical applications. Graphical abstract The SiC nanowire-carbon nanofiber (SiC-CNFs) aerogels were fabricated, and the as-obtained samples possessed excellent microwave absorption and thermal insulation properties.
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
·
2022
·
IF 5.532
Jian Gong,Yuanjie Wang,Jing Huang,Xueliang Pei,Liu He,Zhengren Huang,Yujie Song,Qing Huang
Digital light processing of ceramic precursor was used to prepare SiC rich ceramic parts in this study. In order to achieve appropriate light curing rate, the ceramic precursor allylhydropolycarbosilane (LHBPCS) was mixed with acrylate monomers tripropylene glycol diacrylate and trimethylolpropane triacrylate. The content of acrylate monomers was optimized to increase the ceramic yield and reduce the shrinkage during pyrolysis. According to the results of thermogravimetric analysis and photolithography experiment, 15 wt% acrylate monomers was appropriate. 330 mJ/cm 2 UV irradiation dose was selected for every layer with a thickness of 25 μm, and green bodies with different shapes were successfully printed. During pyrolysis, these printed parts changed from transparent yellow to black accompanying uniform shrinkage. At 1000 °C, the shrinkage was 24.0–26.0%, and crack-free SiC rich ceramic parts with density of 2.11 g/cm 3 and chemical formula of SiC 1.31 O 0.26 were obtained.
研究领域:
材料科学
·
陶瓷加工
✓ 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）