Failure behavior of interfacial domain in SiC-matrix based composites

Ding, Jinxue; Ma, Xiaoqian; Fan, Xiaomeng; Xue, Jimei; Ye, Fang; Cheng, Laifei

doi:10.1016/j.jmst.2021.02.010

Cited by 34 publications

(4 citation statements)

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“…After that, SiC matrix was infiltrated into preforms by CVI at 1000 ℃ for 300 h with a pressure of 10 kPa. The same as our previous studies, this CVI process used methyltrichlorosilane (MTS, CH 3 SiCl 3 ) as the precursor, argon as diluting gas to control the rate of reaction, and hydrogen as the carrier gas [18,25]. The obtained porous C/SiC composites (1.9 g•cm −3 , 12 vol% open porosity, as shown in the black area in Fig.…”

Section: Materials Preparationmentioning

confidence: 95%

“…Si 3 N 4 is a kind of noteworthy oxidation-resistant ceramic, and its CTEs and elastic modulus are generally higher than those of carbon fiber, but lower than those of SiC [7,[14][15][16][17][18][19]. For example, as listed in Table 1, the axial and radial CTEs of carbon fiber are −0.72×10 −6 -2.0×10 −6 K −1 and 8×10 −6 -8.85×10 −6 K −1 , respectively, and the CTEs of Si 3 N 4 and SiC are 2.8×10 −6 -3.6×10 −6 K −1 and 3.5×10 −6 -4.9×10 −6 K −1 , respectively.…”

Section: Introduction mentioning

confidence: 99%

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Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

et al. 2022

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Oxidation behaviors of carbon fiber reinforced SiC matrix composites (C/SiC) are one of the most noteworthy properties. For C/SiC, the oxidation behavior was controlled by matrix microcracks caused by the mismatch of coefficients of thermal expansion (CTEs) and elastic modulus between carbon fiber and SiC matrix. In order to improve the oxidation resistance, multilayer SiC-Si3N4 matrices were fabricated by chemical vapor infiltration (CVI) to alleviate the above two kinds of mismatch and change the local stress distribution. For the oxidation of C/SiC with multilayer matrices, matrix microcracks would be deflected at the transition layer between different layers of multilayer SiC-Si3N4 matrix to lengthen the oxygen diffusion channels, thereby improving the oxidation resistance of C/SiC, especially at 800 and 1000 °C. The strength retention ratio was increased from 61.9% (C/SiC-SiC/SiC) to 75.7% (C/SiC-Si3N4/SiC/SiC) and 67.8% (C/SiC-SiC/Si3N4/SiC) after oxidation at 800 °C for 10 h.

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Section: Materials Preparationmentioning

confidence: 95%

Section: Introduction mentioning

confidence: 99%

Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

et al. 2022

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“…The bonding strength of the fiber-matrix can be well evaluated through a fiber push-out test [40,41], which was conducted in this study. The results are shown in Fig.…”

Section: Mechanical Properties Of 2d-c F /Tamentioning

confidence: 99%

Fabrication and mechanical behavior of 2D-C _f/Ta _xHf _{1−
x}C–SiC composites by a low-temperature and highly-efficient route

Zou,

Ni,

Chen

et al. 2023

Journal of Advanced Ceramics

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C f /Ta x Hf 1−x C-SiC composites are ideal thermal structural materials for service under extreme conditions of hypersonic vehicles. However, how to synthesize Ta x Hf 1-x C powders and efficiently fabricate C f /Ta x Hf 1-x C-SiC composites still faces some challenges. Furthermore, mechanical properties and thermophysical properties of Ta x Hf 1−x C vary with the composition, but not monotonically. In-depth analysis of mechanical behaviors of the C f /Ta x Hf 1−x C-SiC composites is extremely important for their development and applications. In this study, the Ta x Hf 1−x C powders (x = 0.2, 0.5, 0.8) were successfully synthesized via solid solution of TaC and HfC at a relatively low temperature of 1800 ℃, with a small amount of Si as an additive. Subsequently, the efficient fabrication of 2D-C f /Ta x Hf 1-x C-SiC composites was achieved by slurry impregnation and lamination (SIL) combined with precursor infiltration and pyrolysis (PIP). In addition, the mechanical behavior of the composites was investigated systematically. It is demonstrated that the composites present remarkable non-brittle fractures, including a large number of fiber pull out and interphase debonding. Also, the fracture failure involves a complex process of microcrack generation and propagation, matrix cracking, and layer fracture. Moreover, the interfacial bonding between the fibers and the matrix is enhanced as the Ta∶Hf ratio decreases from 4∶1 to 1∶4. As a result, C f /Ta 0.2 Hf 0.8 C-SiC composites exhibit exceptional flexural strength of 437±19 MPa, improved by 46% compared with C f /Ta 0.8 Hf 0.2 C-SiC (299±19 MPa). This study provides a new perception of design and fabrication of ultra-high-temperature ceramic (UHTC) matrix composites with high performance.

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“…[1][2][3][4] The introduction of fiber and the design of fiber/matrix interface can stimulate the energy consumption mechanism such as interfacial debonding and crack deflection and endow the material with non-brittle fracture characteristics. [5][6][7][8][9] However, on the one hand, the matrix between fibers, between fiber bundles, and between layers is brittle ceramics and is difficult to be strengthened and toughened by the energy consumption mechanism in micron scale; on the other hand, the crack initiation threshold in the matrix is low, and the crack propagation cannot be hindered, which ultimately limits the mechanical properties of the material. Therefore, as the weak region in the material, the microregion of the matrix needs to be strengthened and toughened on a finer scale to improve its properties.…”

Section: Introductionmentioning

confidence: 99%

Improvement of high‐temperature stability of PIP SiC_f/SiC material through in situ grown BNNTs

et al. 2021

Int J Applied Ceramic Tech

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In this paper, the effect of in situ grown boron nitride nanotubes (BNNTs) and preparation temperature on mechanical behavior of PIP (Precursor Infiltration and Pyrolysis) SiCf/SiC minicomposites under monotonic and compliance tensile is investigated. In situ BNNTs are grown on the surface of SiC fibers using ball milling–annealing process. Composite elastic modulus, tensile strength, fracture strain, tangent modulus, and loading/unloading inverse tangent modulus (ITM) are obtained and adopted to characterize the mechanical properties of the composites. Microstructures of in situ grown BNNTs and tensile fracture surfaces are observed under scanning electronic microscopic (SEM). For SiCf/SiC minicomposites with BNNTs, the elastic modulus, tensile strength, and fracture strain are all lower than those of SiCf/SiC minicomposites without BNNTs, mainly due to high preparation temperature and the oxidation of the PyC interphase during the annealing process. Tensile stress–strain curves of SiCf/SiC minicomposites with and without BNNTs are predicted using the developed micromechanical constitutive model. The predicted results agreed with experimental data. This work will provide guidance for predicting the service life of SiCf/SiC composite materials and may enable these materials to become a backbone for thermal structure systems in aerospace applications.

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Failure behavior of interfacial domain in SiC-matrix based composites

Cited by 34 publications

References 50 publications

Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

Fabrication and mechanical behavior of 2D-C _f/Ta _xHf _{1−
x}C–SiC composites by a low-temperature and highly-efficient route

Improvement of high‐temperature stability of PIP SiC_f/SiC material through in situ grown BNNTs

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Failure behavior of interfacial domain in SiC-matrix based composites

Cited by 34 publications

References 50 publications

Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

Oxidation behaviors of carbon fiber reinforced multilayer SiC-Si3N4 matrix composites

Fabrication and mechanical behavior of 2D-C f/Ta x Hf 1− x C–SiC composites by a low-temperature and highly-efficient route

Improvement of high‐temperature stability of PIP SiCf/SiC material through in situ grown BNNTs

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Product

Resources

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Fabrication and mechanical behavior of 2D-C _f/Ta _xHf _{1−
x}C–SiC composites by a low-temperature and highly-efficient route

Improvement of high‐temperature stability of PIP SiC_f/SiC material through in situ grown BNNTs