Carbon fiber/Si3N4 composites with SiC nanofiber interphase for enhanced microwave absorption properties

Luo, Hang; Chen, Wenbo; Zhou, Wei; Long, Lan; Deng, Lianwen; Xiao, Peng; Li, Yang

doi:10.1016/j.ceramint.2017.06.096

Cited by 88 publications

(32 citation statements)

References 32 publications

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“…Currently, the preparation of microwave absorbers with high absorption strength, wide absorption bandwidth, low cost, simple and efficient is a key of the research in microwave absorption materials (MAMs). Much attention has been focused on the microwave absorbing materials of magnetic metals [5,6], dielectric materials [7,8,9], conductive macromolecules [10,11], ferrites [12,13] and so on. In which the ferrites have been widely used as the microwave absorber due to the special magnetic property, high Curie temperature, thermo-stable, anti-abrasion, and lower cost etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of SiO2-MnFe2O4 Composites via One-Pot Hydrothermal Synthesis Method and Microwave Absorption Investigation in S-Band

et al. 2019

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MnFe2O4 NPs are successfully decorated on the surface of SiO2 sheets to form the SiO2-MnFe2O4 composite via one-pot hydrothermal synthesis method. The phase identification, morphology, crystal structure, distribution of elements, and microwave absorbing properties in S-band (1.55~3.4 GHz) of the as-prepared composite were investigated by XRD, SEM, TEM, and Vector Network Analyzer (VNA) respectively. Compared with the pure MnFe2O4 NPs, the as-prepared SiO2-MnFe2O4 composite exhibits enhanced microwave absorption performance in this frequency band due to the strong eddy current loss, better impedance matching, excellent attenuation characteristic, and multiple Debye relaxation processes. The maximum reflection loss of −14.87 dB at 2.25 GHz with a broader −10 dB bandwidth over the frequency range of 1.67~2.9 GHz (1.23 GHz) can be obtained at the thickness of 4 mm. Most importantly, the preparation method used here is relatively simple, hence such composite can be served as a potential candidate for effective microwave absorption in S-band.

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Section: Introductionmentioning

confidence: 99%

Preparation of SiO2-MnFe2O4 Composites via One-Pot Hydrothermal Synthesis Method and Microwave Absorption Investigation in S-Band

et al. 2019

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“…However, the microwave absorption of Si 3 N 4 at low temperature (less than 800 °C) is poor [18], which affects the microwave sintering process. The fracture toughness of Si 3 N 4 ceramic is usually between 5.0 MPa·m 1/2 and 7.0 MPa·m 1/2 with high hardness [3,13,14,15,16,17], which should be improved to meet the requirements of high-performance cutting tools.…”

Section: Introductionmentioning

confidence: 99%

“…The fracture toughness of Si 3 N 4 ceramic is usually between 5.0 MPa·m 1/2 and 7.0 MPa·m 1/2 with high hardness [3,13,14,15,16,17], which should be improved to meet the requirements of high-performance cutting tools. When considering that n-SiC has good microwave absorption properties and high hardness at all temperature stages [18], it is added into silicon nitride ceramics. On the one hand, the uniform distributed n-SiC particles can be used as strengthening phase to improve the fracture toughness of the ceramics.…”

Section: Introductionmentioning

confidence: 99%

Effects of Microwave Sintering Temperature and Holding Time on Mechanical Properties and Microstructure of Si3N4/n-SiC ceramics

Qiao

Wang

et al. 2019

Materials

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The n-SiC (nanometer SiC) is added to be the additive in order to improve the mechanical performance of Si3N4 ceramics. A microwave sintered the ceramics at different temperature and holding times. The results shows that the Si3N4/n-SiC ceramics (85 wt% Si3N4 + 5 wt% n-SiC + 5 wt% Al2O3 + 5 wt% Y2O3) have the best mechanical properties at 1600 °C, which is beneficial to the densification and β-Si3N4 phase formation for 10 min: the density, hardness, and fracture toughness were 97.1%, 14.44 GPa, and 7.77 MPa·m1/2, which increased by 2.8%, 7.0%, and 13.1%, respectively, when compared with the ceramics (90 wt% Si3N4 + 5 wt% Al2O3 + 5 wt% Y2O3).

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“…It is well known that MAMs can attenuate electromagnetic waves by converting electromagnetic energy into heat energy or by dissipating it via all kinds of loss mechanisms. At this stage, MAMs have already been extensively investigated; they include carbon materials [5,6,7], conducting polymers [8,9,10], ceramic materials [11,12,13], magnetic metals and alloys [14,15,16], ferrites [17,18,19], etc. Among these materials, ferrites are widely used as MAMs for their advantages of high Curie temperature, special magnetic property, good chemical and thermo-stability, and low costs [20].…”

Section: Introductionmentioning

confidence: 99%

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Yin

Zhang

et al. 2019

Nanomaterials

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In this study, the quaternary hybrid of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs with high-performance in low frequency electromagnetic absorption was synthesized via a facile two-step solvothermal synthesis method. The physicochemical properties as well as electromagnetic parameters and microwave absorption performance were characterized by XRD, SEM, TEM, RS, TGA, and VNA, respectively. The results indicate a nuclear-shell morphology of this hybrid for amorphous carbon coated on the surface of Zn0.5Co0.5Fe2O4 and Mn0.5Ni0.5Fe2O4 mixed polycrystalline ferrites. In addition, the MWCNTs synchronously enwind in the nuclear-shell NPs to form a special cross-linking structure. The outstanding low frequency microwave absorption property is attributed to the synergistic effect of dielectric and magnetic loss, better impedance matching condition, and excellent attenuation characteristics of the as-prepared paramagnetic quaternary hybrid. Maximum RL of −35.14 dB at 0.56 GHz with an effective absorption bandwidth in the range of 0.27–1.01 GHz can be obtained with thickness of 5 mm. This hybrid exhibits superior low frequency microwave absorption properties compared with other ferrite-carbon nanocomposites. This investigation provides a new route to prepare suitable candidates for the absorption of electromagnetic waves in a low frequency band on account of its good performance and simple preparation process.

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Carbon fiber/Si3N4 composites with SiC nanofiber interphase for enhanced microwave absorption properties

Cited by 88 publications

References 32 publications

Preparation of SiO2-MnFe2O4 Composites via One-Pot Hydrothermal Synthesis Method and Microwave Absorption Investigation in S-Band

Preparation of SiO2-MnFe2O4 Composites via One-Pot Hydrothermal Synthesis Method and Microwave Absorption Investigation in S-Band

Effects of Microwave Sintering Temperature and Holding Time on Mechanical Properties and Microstructure of Si3N4/n-SiC ceramics

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

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