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Ceramic matrix composite

About: Ceramic matrix composite is a research topic. Over the lifetime, 7807 publications have been published within this topic receiving 117020 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, carbon fiber reinforced silicon carbide (C/SiC) was processed with an 800-nm femtosecond laser, and the results were analyzed through theoretical calculations and wave optics simulations.
Abstract: Carbon fiber reinforced silicon carbide (C/SiC) was processed with an 800 nm femtosecond laser, and the results were analyzed through theoretical calculations and wave optics simulations. In the ablation experiment, C/SiC morphologies for different parameters such as laser power, defocus distance, and scanning speed were compared. It was found that the roughness prior to processing of the C/SiC surface noticeably affects the ablation effect. Beam waist radius, curvature radius, and electric field intensity of the femtosecond laser were calculated theoretically and the wave optics module was simulated in finite element software. Causes for the different morphologies can be explained directly through the simulation results from the perspective of the electromagnetic field. It was found that the microgroove quality of C/SiC processed subject to the femtosecond laser with high fluence is relatively higher and that the edge oxidation of the processing area can be effectively controlled through argon protection. The comparison between the simulation and the experiment results deepens the understanding of the ablation mechanism, which can provide references for the improvement in processing quality of ceramic matrix composites (CMC) by laser treatment.

52 citations

Patent
24 Apr 1985
TL;DR: An inorganic fiber-reinforced ceramic composite material comprising a matrix of a ceramic and inorganic fibers as a reinforcing material, characterized in this paper, is characterized in that (a) the fibers are specified inorganic materials containing silicon, either titanium or zirconium, carbon and oxygen, and (b) the ceramic is at least one material selected from the group consisting of carbides, nitrides, oxides, glass ceramics, graphite, etc.
Abstract: An inorganic fiber-reinforced ceramic composite material comprising a matrix of a ceramic and inorganic fibers as a reinforcing material, characterized in that (a) the inorganic fibers are specified inorganic fibers containing silicon, either titanium or zirconium, carbon and oxygen, (b) the ceramic is at least one material selected from the group consisting of carbides, nitrides, oxides, glass ceramics, graphite and specified inorganic materials containing silicon, either titanium or zirconium, carbon and oxygen, (c) the inorganic fibers have an initial reaction degradation speed of not more than 0.35 kg/mm2.sec-1 and a tenacity reduction ratio of not more than 40% during the production of the composite material, (d) the composite material has a critical stress intensity factor about 2 to 7 times as high as that of said matrix alone, and (e) the composite material has a bending strength reduction ratio, measured by a thermal shock fracture resistance measuring method, of not more than about 10% after it is heat-treated in air at 800° to 1300° C., immediately then dipped in water at room temperature, and then dried.

51 citations

Journal ArticleDOI
TL;DR: In this article, the influence of pore anisotropy on the hydrostatic properties of piezoelectric composite 3-3 materials was examined and the model developed and results are a useful aid to fabricate and optimise piezocomposite 3 -3 structures for specific applications.

51 citations

Journal ArticleDOI
TL;DR: In this paper, ZMI-SiC and AmosicSiC fibers were used to fabricate SiCf/SiCN composites with good EMA or EMI properties.

51 citations

Journal ArticleDOI
TL;DR: In this paper, the porosity dependence of Young's modulus (E), modulus of rupture (σR), toughness (K1C), and fracture energy (G1C) was found to be well described on the entire range of porosity by relations of the form X0(1−P)mX.
Abstract: Porous laminar materials and alternate laminates of silicon carbide dense and porous layers have been elaborated by tape casting and liquid phase sintering processing. Porosity was introduced by incorporation of pore forming agents (corn starch or graphite platelets) in the slurry. Homogeneous distributions of porosity have been obtained for both monolithic and composite laminates. The microstructure of the SiC matrix was equiaxed and was not affected by the porosity. The porosity (P) dependence of Young’s modulus (E), modulus of rupture (σR), toughness (K1C) and fracture energy (G1C) was found to be well described on the entire range of porosity by relations of the form X0(1−P)mX proposed by Wagh et al. from a model that takes into account the tortuosity of the porosity. In the case of our materials, mE=2.7, m σ R =m K 1 C =m E +0.5 and m G 1 C =m E +1 . All the ex-corn starch composites behaved in a brittle manner, even those having weak interlayers with a porosity content higher than the critical value of about 0.4 predicted by the model developed by Blanks et al. A non-purely brittle behaviour started to be obtained with ex-graphite laminar composites in which the pores are elongated and oriented parallel to the interfaces.

51 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202394
2022236
2021300
2020344
2019433
2018354