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

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

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

源语言英语
页(从-至)933-941
页数9
期刊Journal of Advanced Ceramics
13
7
DOI
出版状态已出版 - 7月 2024

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