The enhanced mechanical properties of SiC nanowires/Ba0.75Sr0.25Al2Si2O8 ceramics with embedded SiO2 interface

Xin Li; Xiaomeng Fan; Haojie Luo; Xiaoke Lu; Jimei Xue; Fang Ye; Yongsheng Liu

doi:10.26599/JAC.2024.9220907

The enhanced mechanical properties of SiC nanowires/Ba_0.75Sr_0.25Al₂Si₂O₈ ceramics with embedded SiO₂ interface

Xin Li, Xiaomeng Fan, Haojie Luo, Xiaoke Lu, Jimei Xue, Fang Ye, Yongsheng Liu

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

In this work, low-softening-temperature and low-modulus SiO₂ was introduced as an embedded interface between SiC nanowires (SiCnws) and a Ba_xSr_1-xAl₂Si₂O₈ ceramic matrix to enhance strength and toughness of the ceramic. During the sintering process, molten SiO₂ enhances the flowability of the ceramic powders and modifies the dispersion of SiCnws. The strengthening effect of SiCnws was fully realized, and the flexural strength of the optimized ceramics reached 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 (KIC) is thus improved by 94.0%, reaching 3.1±0.5

Original language	English
Pages (from-to)	933-941
Number of pages	9
Journal	Journal of Advanced Ceramics
Volume	13
Issue number	7
DOIs	https://doi.org/10.26599/JAC.2024.9220907
State	Published - Jul 2024

Keywords

densification
mechanical properties
multiphase ceramics
SiO interface

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title = "The enhanced mechanical properties of SiC nanowires/Ba0.75Sr0.25Al2Si2O8 ceramics with embedded SiO2 interface",

abstract = "In this work, low-softening-temperature and low-modulus SiO2 was introduced as an embedded interface between SiC nanowires (SiCnws) and a BaxSr1-xAl2Si2O8 ceramic matrix to enhance strength and toughness of the ceramic. During the sintering process, molten SiO2 enhances the flowability of the ceramic powders and modifies the dispersion of SiCnws. The strengthening effect of SiCnws was fully realized, and the flexural strength of the optimized ceramics reached 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 (KIC) is thus improved by 94.0%, reaching 3.1±0.5",

keywords = "densification, mechanical properties, multiphase ceramics, SiO interface",

author = "Xin Li and Xiaomeng Fan and Haojie Luo and Xiaoke Lu and Jimei Xue and Fang Ye and Yongsheng Liu",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = jul,

doi = "10.26599/JAC.2024.9220907",

language = "英语",

volume = "13",

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journal = "Journal of Advanced Ceramics",

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TY - JOUR

T1 - The enhanced mechanical properties of SiC nanowires/Ba0.75Sr0.25Al2Si2O8 ceramics with embedded SiO2 interface

AU - Li, Xin

AU - Fan, Xiaomeng

AU - Luo, Haojie

AU - Lu, Xiaoke

AU - Xue, Jimei

AU - Ye, Fang

AU - Liu, Yongsheng

N1 - Publisher Copyright: © The Author(s) 2024.

PY - 2024/7

Y1 - 2024/7

N2 - In this work, low-softening-temperature and low-modulus SiO2 was introduced as an embedded interface between SiC nanowires (SiCnws) and a BaxSr1-xAl2Si2O8 ceramic matrix to enhance strength and toughness of the ceramic. During the sintering process, molten SiO2 enhances the flowability of the ceramic powders and modifies the dispersion of SiCnws. The strengthening effect of SiCnws was fully realized, and the flexural strength of the optimized ceramics reached 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 (KIC) is thus improved by 94.0%, reaching 3.1±0.5

AB - In this work, low-softening-temperature and low-modulus SiO2 was introduced as an embedded interface between SiC nanowires (SiCnws) and a BaxSr1-xAl2Si2O8 ceramic matrix to enhance strength and toughness of the ceramic. During the sintering process, molten SiO2 enhances the flowability of the ceramic powders and modifies the dispersion of SiCnws. The strengthening effect of SiCnws was fully realized, and the flexural strength of the optimized ceramics reached 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 (KIC) is thus improved by 94.0%, reaching 3.1±0.5

KW - densification

KW - mechanical properties

KW - multiphase ceramics

KW - SiO interface

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U2 - 10.26599/JAC.2024.9220907

DO - 10.26599/JAC.2024.9220907

M3 - 文章

AN - SCOPUS:85200139449

SN - 2226-4108

VL - 13

SP - 933

EP - 941

JO - Journal of Advanced Ceramics

JF - Journal of Advanced Ceramics

IS - 7

ER -

The enhanced mechanical properties of SiC nanowires/Ba_0.75Sr_0.25Al₂Si₂O₈ ceramics with embedded SiO₂ interface

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Keywords

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