Effect of processing technology on structural stability of SiC/SiBCZr ceramic matrix composites

Chen, Mingwei; Qiu, Hai; Zhang, Bingyu; Ma, Xin; Luo, Wendong; Liu, Shanhua; Liu, Shijian

doi:10.1016/j.ceramint.2021.12.262

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…When the interfacial layer thickness increased from 0.4 to 1.2 μm, the fiber pulling out behavior of SiC/SiC composites was more apparent, and the overall pullout of the fiber bundle and the successive withdrawal of the fiber coincided, accompanied by the noticeable increase of the fiber pullout length. The above behavior indicated that the appropriate increase in the thickness of the interfacial layer could optimize the interfacial bonding strength, release the internal stress of SiC/SiC composites through crack deflection and fiber bridging before fiber pulling out, and promote the strengthening and toughening of SiC/SiC composites 35 …”

Section: Resultsmentioning

confidence: 94%

“…The above behavior indicated that the appropriate increase in the thickness of the interfacial layer could optimize the interfacial bonding strength, release the internal stress of SiC/SiC composites through crack deflection and fiber bridging before fiber pulling out, and promote the strengthening and toughening of SiC/SiC composites. 35 When the interfacial layer thickness continued to increase from 1.4 to 1.8 μm, many fibers were pulled out from the cross section of SiC/SiC composites, especially the fibers with lengths longer than 1 mm. It meant that the increase in the thickness of the BN interfacial layer, especially the appearance of the BN interfacial multilayer structure, might improve the crack transmission path.…”

Section: Morphology and Structure Analysis Of Sic/sic Compositesmentioning

confidence: 99%

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Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites

Chen,

Qiu,

Zhao

et al. 2024

Int J Applied Ceramic Tech

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Boron nitride (BN) interfacial layer with controlled thickness and structure was prepared on the surface of near stoichiometric ratio SiC fiber preforms by a chemical vapor deposition process, and the SiC/SiC composites were obtained by polymer precursor infiltration and pyrolysis process. The microstructure of the BN interfacial layer and SiC/SiC composites was tested by scanning electron microscopy, and the mechanical behavior of SiC/SiC composites was characterized by a mechanical properties test. Results showed that BN interfacial layer was evenly distributed in the fiber preforms with excellent thickness consistency. As the thickness of the BN interfacial layer increased, the deflection path of the crack increased gradually, resulting in the flexural strength first increasing and then decreasing. The mechanical behavior mentioned above was mainly attributed to the dual effects of load transfer and crack propagation of the BN interfacial layer; that was, the crack propagation of ceramic matrix under external load lengthened the path of load transfer and formed a large number of fibers bridging and pulling out successively, which contributed to the energy dissipation mechanism.

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Section: Resultsmentioning

confidence: 94%

Section: Morphology and Structure Analysis Of Sic/sic Compositesmentioning

confidence: 99%

Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites

Chen,

Qiu,

Zhao

et al. 2024

Int J Applied Ceramic Tech

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“…It was worth noting that the pores in the ablation center area were significantly larger than those in the ablation outside area, which was mainly due to higher temperature, higher heat flux, and stronger scour force of the ablation center, leading to strong thermochemical corrosion and thermophysical corrosion, resulting the escape rate of B 2 O 3 or SiO 2 •B 2 O 3 in the oxidation products was much higher than the bridging and filling effect of molten SiO 2 [26].…”

Section: Sic F /Sibczr Composites After Ablationmentioning

confidence: 99%

Ablative behavior and mechanism of SiC _f/SiBCZr composites prepared by PIP process

Chen,

Zhao,

Qiu

et al. 2024

Journal of Advanced Ceramics

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SiC f /SiBCZr composites were prepared by polymer precursor impregnation and pyrolysis process with near stoichiometric ratio SiC fiber preform as reinforcement phase and SiBCZr multiphase ceramic precursor as impregnating reagent. The results highlighted that the SiC f /SiBCZr composites exhibited excellent ablative properties after ablative tests at 1200 ℃/3600 s and 1400 ℃/3600 s, and the strength retention rates of the composites reached 90% and 85%, respectively. This was mainly due to the liquid sealing effect of the ablative products represented by B 2 O 3 and SiO 2 •B 2 O 3 , which inhibited the ablative reaction by reducing the diffusion rate of the oxidation medium, and the solid pinning effect of the substances represented by SiO 2 , ZrO 2 , and ZrSiO 4 , which could play high viscosity and high strength characteristics to improve anti-erosion ability. The above-mentioned SiC f /SiBCZr composites with corrosion resistance, oxidation resistance, and ablative resistance provided a solid material foundation and technical support for the development of reusable spacecraft hot-end components.

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“…13,14 The above interfacial phases integrate the characteristics of the composition, structure, and function of PyC, BN, SiC, and other ceramic materials to improve the strength, toughness, and environmental stability of ceramic matrix composites. 15,16 In this study, high-performance SiC/SiC composites were prepared by polymer impregnation and pyrolysis (PIP) process with domestic near stoichiometric ratio SiC fiber preform as reinforcement structure, 17,18 PyC/BN multiphase interfacial phases (PyC/BN) as interfacial phases and polycarbosilane pyrolysis products as matrix phase. The corresponding force release effect of the PyC interfacial phase and the anti-oxidation effect of the BN interfacial phase are comprehensively utilized to ensure the improvement of the mechanical properties and the stability of the environmental properties of SiC/SiC composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of PyC/BN interfacial phases on mechanical behavior of SiC/SiC composites

Qiu,

Zhang,

Luo

et al. 2024

Int J Applied Ceramic Tech

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PyC/BN multiphase interfacial phases were prepared on the surface of SiC fiber preform, then the near stoichiometric ratio SiC fiber reinforced SiC ceramic matrix composites were obtained by polymer impregnation and pyrolysis (PIP) process. The mechanical behavior of SiC/SiC composites was characterized by three‐point bending tests and fracture toughness tests. The stress release and load transfer effects of the interfaces under external loads were analyzed by scanning electron microscope (SEM). Results showed that with the increasing of PyC component thickness from .10 to.30 µm in the PyC/BN multiphase interfacial phases, the bending strength and fracture toughness both increased first and then decreased. The results occurred due to the competition between load transfer and stress release of the interfaces. The relatively optimized interfacial phase structure was that the thickness of the PyC interfacial phase and BN interfacial phase were .20 and.30 µm. The bending strength and fracture toughness of the optimized SiC/SiC composites reached 660.65 MPa and 29.01 MPa•m1/2. Respectively, many matrix cracks appeared in the horizontal and vertical directions, occupying almost the entire fracture section. The growth path of the matrix crack was significantly increased with many long fibers pulled out and broken, which was conducive to the strengthening and toughening of SiC/SiC composites.

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Effect of processing technology on structural stability of SiC/SiBCZr ceramic matrix composites

Cited by 7 publications

References 12 publications

Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites

Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites

Ablative behavior and mechanism of SiC _f/SiBCZr composites prepared by PIP process

Effect of PyC/BN interfacial phases on mechanical behavior of SiC/SiC composites

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Effect of processing technology on structural stability of SiC/SiBCZr ceramic matrix composites

Cited by 7 publications

References 12 publications

Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites

Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites

Ablative behavior and mechanism of SiC f/SiBCZr composites prepared by PIP process

Effect of PyC/BN interfacial phases on mechanical behavior of SiC/SiC composites

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Ablative behavior and mechanism of SiC _f/SiBCZr composites prepared by PIP process