Mechanical properties and microstructure of 2.5D (shallow straight-joint) quartz fibers-reinforced silica composites by silicasol-infiltration-sintering

Liu, Yong; Zhu, Jianxun; Chen, Zhaofeng; Jiang, Yun; Li, Chengdong; Li, Binbin; Lin, Long; Guan, Tianru; Chen, Zhaohai

doi:10.1016/j.ceramint.2011.08.006

Cited by 29 publications

(15 citation statements)

References 23 publications

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“…The SiO 2f /SiO 2 composites were prepared by SIS method; the sintering temperature of the composites was relatively low (450 1C) compared with that of other research papers [3,6,12]. The preparation process has been described previously in full detail [13,14]. The Archimedes technique was used to determine the specimen density.…”

Section: Composite Preparationmentioning

confidence: 99%

Comparison of 3D four-directional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior

Liu

Chen

Zhu

et al. 2012

Materials Science and Engineering: A

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Section: Composite Preparationmentioning

confidence: 99%

Comparison of 3D four-directional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior

Liu

Chen

Zhu

et al. 2012

Materials Science and Engineering: A

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“…The geometrical parameters of the 2.5D preform were listed in Table-1. The 2.5D Qf/S composites were prepared by SIS method, which had been already described [16][17][18] . Most importantly, the sintering temperature was about 450 ºC.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties of Two Kinds of 2.5D Quartzf/Silica Composites by Silica Sol-Infiltration-Sintering

Liu¹,

Zhu²,

Chen³

2013

Asian J. Chem.

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Due to high melting point, high thermal shock resistance, low dielectric constant and low loss tangents, amorphous silica have received considerable attraction in the field of missile radomes, heat-resistant materials for aerospacecraft, crucibles and so on 1-4. However, the intrinsic brittleness and very low fracture strain restrict in many fields for its further applications. Compared with monolithic ceramics, continuous fiberreinforced ceramic matrix composites (CFCCs) have been improved the fracture resistance greatly 3,5-8. In order to improve the mechanical properties of silica, silica composites reinforced by shorter silica fibers and 2D silica preforms have been investigated. It was showed that the mechanical properties were enhanced. However, there are limits to improve the properties 5. 2.5D composites were studied in literatures 9-14. There are a number of 2.5D structures such as 2.5D shallow bend-joint, shallow straight-joint, deep straight-joint and so on. The characteristics of 2.5D weave technique make the fabric preform particularly suitable for conforming to the mould surface of revolving components and allow net or near-net shaping 9. The 2.5D composites possess higher through-the-thickness mechanical properties as compared to equivalent laminated composites. The 2.5D composites show better delamination resistance and higher interlaminar fracture toughness than traditional laminated composites when subjected to interlaminar

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“…For the purpose of simplifying the analysis of 3D four-directional braided structure, the representative unit cell (RUC) is chosen to analyse the braided structures. 18,19 Mechanical properties of the composites were investigated under tensile loading, flexural loading and shear loading, employing five specimens in each type of loading. 1b and c, it can be seen that the RUC of 3D four-directional braided structure contains four kinds of yarns with different directions, and these four-directional yarns have the same angles with the braiding direction.…”

Section: E X P E R I M E N T a L P R O C E D U R E Smentioning

confidence: 99%

“…From Fig. 18). SiO 2f /SiO 2 composite was prepared by 11 SIS cycles, at a relatively low sintering temperature of 450 • C compared to other papers.…”

Section: E X P E R I M E N T a L P R O C E D U R E Smentioning

confidence: 99%

“…16,17 The preparation process had been fully described in previously published papers. 18,19 Mechanical properties of the composites were investigated under tensile loading, flexural loading and shear loading, employing five specimens in each type of loading. All the mechanical tests were carried out in a SANS CMT5105 electronic universal testing machine with a constant loading speed of 0.3 mm/min.…”

Section: E X P E R I M E N T a L P R O C E D U R E Smentioning

confidence: 99%

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Mechanical behaviour and microstructural characterization of 3D four‐directional braided SiO₂f/SiO₂ composites

Liu

Zhu

Chen

et al. 2012

Fatigue Fract Eng Mat Struct

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In this paper, SiO2f/SiO2 composites reinforced by 3D four‐directional braided quartz preform were prepared by the silica sol‐infiltration‐sintering method in a relatively low sintering temperature (450 °C). To characterize the mechanical properties of the composites, mechanical testing was carried out under various loading conditions, including tensile, flexural and shear loading. The microstructure and the fracture behaviour of the 3D four‐directional braided SiO2f/SiO2 composites were studied. The tensile strength, flexural strength and the in‐plane shear strength were 30.8 MPa, 64.0 MPa and 22.0 MPa, respectively. The as‐fabricated composite exhibited highly nonlinear stress–strain behaviour under all the three types of loading. The tensile and flexural fracture mechanisms were fully discussed. The fracture mode of the 3D four‐directional braided SiO2f/SiO2 composite in the Iosipescu shear testing was based on a mixed mechanism because of the multi‐directivity of the composite. Owing to low sintered temperature, the fibre/matrix interfacial strength was weak. The SiO2f/SiO2 composites showed non‐catastrophic behaviour resulting from extensive fibre pull‐out during the failure process.

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Mechanical properties and microstructure of 2.5D (shallow straight-joint) quartz fibers-reinforced silica composites by silicasol-infiltration-sintering

Cited by 29 publications

References 23 publications

Comparison of 3D four-directional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior

Comparison of 3D four-directional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior

Mechanical Properties of Two Kinds of 2.5D Quartzf/Silica Composites by Silica Sol-Infiltration-Sintering

Mechanical behaviour and microstructural characterization of 3D four‐directional braided SiO₂f/SiO₂ composites

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Mechanical properties and microstructure of 2.5D (shallow straight-joint) quartz fibers-reinforced silica composites by silicasol-infiltration-sintering

Cited by 29 publications

References 23 publications

Comparison of 3D four-directional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior

Comparison of 3D four-directional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior

Mechanical Properties of Two Kinds of 2.5D Quartzf/Silica Composites by Silica Sol-Infiltration-Sintering

Mechanical behaviour and microstructural characterization of 3D four‐directional braided SiO2f/SiO2 composites

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Mechanical behaviour and microstructural characterization of 3D four‐directional braided SiO₂f/SiO₂ composites