Microstructure and mechanical properties of hot-pressed SiC nanofiber reinforced SiC composites

Yang, Jiahao; Ma, Ruiqi; Zhu, Mingming; Xiong, Yilian; Shi, Jiahui; Li, Xiaohong; Li, Haolin; Chen, Jianjun

doi:10.1016/j.ceramint.2022.02.070

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…SiC nw pull‐out and bridging indicates the obtained suitable bonding strength between the matrix and the reinforcement. Moreover, the pull‐out length of the SiC nw in this experiment is larger than that of the SiC nw /SiC CMC without interface coating 22 . It can be attributed to the weak interface provided by the BN interface for the composite, thereby promoting the fiber pull‐out and debonding.…”

Section: Resultsmentioning

confidence: 74%

“…The density of the composites was measured using the Archimedes method, and their relative densities were calculated by employing the compound principle. The three‐point flexural test and the single edge‐notched beam test were carried out to study the mechanical properties of the SiC nw /SiC CMC 22 …”

Section: Methodsmentioning

confidence: 99%

“…Moreover, the pull-out length of the SiC nw in this experiment is larger than that of the SiC nw /SiC CMC without interface coating. 22 It can be attributed to the weak interface provided by the BN interface for the composite, thereby promoting the fiber pull-out and debonding. In particular, Figure 11 CMC.…”

Section: Effects Of the Fiber Mass Fraction On Mechanical Properties ...mentioning

confidence: 99%

“…The three-point flexural test and the single edge-notched beam test were carried out to study the mechanical properties of the SiC nw /SiC CMC. 22…”

Section: Characterizationsmentioning

confidence: 99%

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Microstructure and strengthening behavior in high content SiC nanowires reinforced SiC composites

et al. 2023

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In this study, the high-content SiC nw reinforced SiC ceramic matrix composites (SiC nw /SiC CMC) were successfully fabricated by hot pressing β-SiC and sintering additive (Al 2 O 3 -Y 2 O 3 ) with boron nitride interphase modification SiC nw . The effects of sintering additive content and mass fraction (5-25 wt%) of SiC nw on the density, microstructure, and mechanical properties of the composites were investigated. The results showed that with the increase of sintering additives from 10 wt% to 12 wt%, the relative density of the SiC nw /SiC CMC increased from 97.3% to 98.9%, attributed to the generated Y 3 Al 5 O 12 (YAG) liquid phase from the Al 2 O 3 -Y 2 O 3 that promotes the rearrangement and migration of SiC grains. The comprehensive performance of the obtained composite with 15 wt% SiC nw possessed the optimal flexural strength and fracture toughness of 524 ± 30.24 MPa and 12.39 ± 0.49 MPa⋅m 1/2 , respectively. Besides, the fracture mode of the composites with 25 wt% SiC nw content revealed a pseudo-plastic fracture behavior. It concludes that the 25 wt% SiC nw /SiC CMC was toughened by the fiber pull-outs, debonding, bridging, and crack deflection that can consume plenty of fracture energy. The strategy of SiC nanowires worked as a main bearing phase for the fabrication of SiC/SiC CMC providing critical information for understanding the mechanical behavior of high toughness and high strength SiC nanoceramic matrix composites.

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Section: Resultsmentioning

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Section: Effects Of the Fiber Mass Fraction On Mechanical Properties ...mentioning

confidence: 99%

“…The three-point flexural test and the single edge-notched beam test were carried out to study the mechanical properties of the SiC nw /SiC CMC. 22…”

Section: Characterizationsmentioning

confidence: 99%

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Microstructure and strengthening behavior in high content SiC nanowires reinforced SiC composites

et al. 2023

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“…SiCnws have the characteristics of a high strength and hardness, which are inherited from the SiC ceramic, as well as a good toughness and elasticity, which are typical of nanomaterials [26,27]. Recently, SiCnws have already been utilized in ceramic matrices such as SiC and Al2O3, as well as in ceramic matrix composites like carbon fiber/lithium aluminosilicate, demonstrating outstanding strengthening and toughening effects [28][29][30]. SiCnws could potentially serve as a highly efficacious reinforcing agent for BSAS ceramic.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

The enhanced mechanical properties of SiC nanowires/Ba _0.75Sr _0.25Al ₂Si ₂O ₈ ceramics with embedded SiO ₂ interface

Li,

Fan,

Luo

et al. 2024

Journal of Advanced Ceramics

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In this work, low-softening-temperature and low-modulus SiO2 was introduced as an embedded interface between SiC nanowires (SiCnws) and the BaxSr1−xAl2Si2O8 ceramic matrix to enhance the strength and toughness of the ceramic. In the sintering process, molten SiO2 enhances the flowability of the ceramic powders and modifies the dispersion of the SiCnws. The strengthening effect of SiCnws was fully realized, and the flexural strength of the optimized ceramics reaches 193±16 MPa, which represents an increase of 52.6%. After the formation of the embedded SiO2 interface with a low modulus, cracks can deflect along the SiCnws surface, which is consistent with the criterion of He and Hutchinson. This can effectively extend the crack propagation path, and the fracture toughness is thus improved by 94.0%, reaching 3.1±0.5 MPa• m 1/2 .

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Compositional gradient affects the residual stress distribution in Si3N4/SiC functionally graded materials

Sun

Jing

Lei

et al. 2023

Ceramics International

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Microstructure and mechanical properties of hot-pressed SiC nanofiber reinforced SiC composites

Cited by 7 publications

References 26 publications

Microstructure and strengthening behavior in high content SiC nanowires reinforced SiC composites

Microstructure and strengthening behavior in high content SiC nanowires reinforced SiC composites

The enhanced mechanical properties of SiC nanowires/Ba _0.75Sr _0.25Al ₂Si ₂O ₈ ceramics with embedded SiO ₂ interface

Compositional gradient affects the residual stress distribution in Si3N4/SiC functionally graded materials

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Microstructure and mechanical properties of hot-pressed SiC nanofiber reinforced SiC composites

Cited by 7 publications

References 26 publications

Microstructure and strengthening behavior in high content SiC nanowires reinforced SiC composites

Microstructure and strengthening behavior in high content SiC nanowires reinforced SiC composites

The enhanced mechanical properties of SiC nanowires/Ba 0.75Sr 0.25Al 2Si 2O 8 ceramics with embedded SiO 2 interface

Compositional gradient affects the residual stress distribution in Si3N4/SiC functionally graded materials

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The enhanced mechanical properties of SiC nanowires/Ba _0.75Sr _0.25Al ₂Si ₂O ₈ ceramics with embedded SiO ₂ interface