Sol-gel temperature dependent ductile-to-brittle transition of aluminosilicate fiber reinforced silica matrix composite

Yang, Lingwei; Wang, J.Y.; Liu, H.T.; Jiang, Ru; Cheng, Haifeng

doi:10.1016/j.compositesb.2017.03.043

Cited by 38 publications

(17 citation statements)

References 49 publications

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“…The interfacial shear strength measured in each composite as a function of sintering temperature is thus plotted in Figure B. At 800 and 1000°C, the interfacial shear strength was comparably low, <150 MPa, which is in accordance with a recent report in the AS f /SiO 2 composite . This weak interfacial feature in the typical oxide/oxide composite is in contrast to those traditional ceramic matrix composites where interfacial reaction generally occurred at fiber/matrix interface, thus forming strong interfacial interactions .…”

Section: Resultssupporting

confidence: 85%

“…However, the measured hardness was still decreased to ≈9.6 GPa. This can be explained by the formation of mullite phase and the grain growth of mullite at 1200°C …”

Section: Resultsmentioning

confidence: 99%

“…The given fiber volume fraction was ≈42%. Details of the weaving structure can be accessed in Ref . The organic coatings in the as‐received AS fibers were removed by a thermal treatment at 500°C for 2 hours in air.…”

Section: Experimental and Modeling Proceduresmentioning

confidence: 99%

“…It is well-known that the macro-mechanical properties of oxide/oxide composites are mainly dominated by the micromechanical properties of fiber, matrix and fiber/matrix interface, which are more sensitive to sintering temperatures. 19,20 For example, L.W. Yang 20 , etc.…”

Section: Introductionmentioning

confidence: 99%

“…19,20 For example, L.W. Yang 20 , etc. have found a ductile-to-brittle transition of an AS fiber reinforced SiO 2 (AS f /SiO 2 ) composite at a sintering temperature of 1200°C, due to the formation of an interfacial reaction zone, which arises significantly the interfacial strength and degrades severely the toughness of the composite.…”

Section: Introductionmentioning

confidence: 99%

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A multiscale methodology quantifying the sintering temperature‐dependent mechanical properties of oxide matrix composites

et al. 2018

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A novel methodology combining multiscale mechanical testing and finite element modeling is proposed to quantify the sintering temperature‐dependent mechanical properties of oxide matrix composites, like aluminosilicate (AS) fiber reinforced Al2O3 matrix (ASf/Al2O3) composite in this work. The results showed a high‐temperature sensitivity in the modulus/strength of AS fiber and Al2O3 matrix due to their phase transitions at 1200°C, as revealed by instrumented nanoindentation technique. The interfacial strength, as measured by a novel fiber push‐in technique, was also temperature‐dependent. Specially at 1200°C, an interfacial phase reaction was observed, which bonded the interface tightly, as a result, the interfacial shear strength was up to ≈450 MPa. Employing the measured micro‐mechanical parameters of the composite constituents enabled the prediction of deformation mechanism of the composite in microscale, which suggested a dominant role of interface on the ductile/brittle behavior of the composite in tension and shear. Accordingly, the ASf/Al2O3 composite exhibited a ductile‐to‐brittle transition as the sintering temperature increased from 800 to 1200°C, due to the prohibition of interfacial debonding at higher temperatures, in good agreement with numerical predictions. The proposed multiscale methodology provides a powerful tool to study the mechanical properties of oxide matrix composites qualitatively and quantitatively.

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Section: Resultssupporting

confidence: 85%

“…However, the measured hardness was still decreased to ≈9.6 GPa. This can be explained by the formation of mullite phase and the grain growth of mullite at 1200°C …”

Section: Resultsmentioning

confidence: 99%

Section: Experimental and Modeling Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A multiscale methodology quantifying the sintering temperature‐dependent mechanical properties of oxide matrix composites

et al. 2018

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Effect of Sintering Temperature on Mechanical Behaviors of an Oxide Fiber‐Reinforced Oxide Matrix Composite

et al. 2023

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Sintering temperature can significantly affect the mechanical behaviors of ceramic matrix composites. Herein, the effect of sintering temperature (900–1200 °C) on micro‐ and macromechanical properties of an oxide fiber‐reinforced oxide matrix (oxide/oxide) composite is investigated. The crack propagation path is predicted by the He–Hutchinson model. Results show that the elastic modulus of matrix and interfacial shear strength increase with sintering temperature. The propagating crack converts from deflection along the interface to direct penetration into the matrix at 1200 °C. With increase of the sintering temperature, the flexural strength and interlaminar shear strength monotonically increase, while the fracture toughness increases and then decreases at 1200 °C. A good balance between the fracture strength and fracture toughness is achieved on the 1100 °C sintered composite, which possesses a high flexural strength of ≈276.7 MPa, a high interlaminar shear strength of ≈17.2 MPa, and a high fracture toughness of ≈13.9 MPa m1/2. The study offers a new sight in deep understand of the preparation and applicability of oxide/oxide composite at high temperatures.

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Microstructure and Mechanical Properties of a Three‐Dimensional Oxide/Oxide Composite after Long‐Term Thermal Exposure

Sun,

Tian,

Liu

et al. 2024

Adv Eng Mater

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Herein, a three‐dimensional (3D) oxide fiber reinforced oxide matrix (oxide/oxide) composite is fabricated via slurry infiltration and sintering process. Subsequently, the effects of thermal aging on the microstructure and mechanical properties of the 3D oxide/oxide composite at 900 and 1100 °C are investigated. Experimental results indicate that the thermal aging affects the matrix microstructures and fiber/matrix interface. The elastic modulus of the matrix and interfacial shear strength increases with aging temperature and time. Aging treatment at 900 °C for 100 and 300 h results in a moderate decrease in the flexural strength and fracture toughness but improves the delamination resistance, whereas that at 1100 °C for 100 h lead to a significant decrease in the flexural strength and fracture toughness. The changes in mechanical properties might be attributed to matrix densification and enhanced interfacial bonding.

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Sol-gel temperature dependent ductile-to-brittle transition of aluminosilicate fiber reinforced silica matrix composite

Cited by 38 publications

References 49 publications

A multiscale methodology quantifying the sintering temperature‐dependent mechanical properties of oxide matrix composites

A multiscale methodology quantifying the sintering temperature‐dependent mechanical properties of oxide matrix composites

Effect of Sintering Temperature on Mechanical Behaviors of an Oxide Fiber‐Reinforced Oxide Matrix Composite

Microstructure and Mechanical Properties of a Three‐Dimensional Oxide/Oxide Composite after Long‐Term Thermal Exposure

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