Dip-coating of boron nitride interphase and its effects on mechanical properties of SiCf/SiC composites

Donghai Ding; Wancheng Zhou; Fa Luo; Malin Chen; Dongmei Zhu

doi:10.1016/j.msea.2012.01.118

Dip-coating of boron nitride interphase and its effects on mechanical properties of SiC_f/SiC composites

Donghai Ding, Wancheng Zhou, Fa Luo, Malin Chen, Dongmei Zhu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

46 Scopus citations

Abstract

Boron nitride (BN) coatings were successfully synthesized on KD-1 SiC fibers by dip-coating in boric acid and urea solution followed by heat treatment at 1000°C in nitrogen. The SEM micrographs indicated that the BN coating is smooth. The XRD and Raman spectrum results showed that the composition of the coatings is h-BN. The effects of BN interphase on the mechanical properties of 2.5D SiC fiber reinforced CVI-SiC matrix (SiC/SiC) composites were investigated. The results show that the flexural strength of SiC_f/SiC composites with and without BN interphase is 170MPa and 60MPa, respectively. And, compared to composites without interphase, the SiC_f/SiC composites with BN interphase exhibit an obvious toughened fracture behavior. It is indicated that dip-coating BN interphase can effectively adjust the interfacial bonding strength and improve the mechanical properties of SiC_f/SiC composites.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	543
DOIs	https://doi.org/10.1016/j.msea.2012.01.118
State	Published - 1 May 2012

Keywords

Ceramics
Composites
Mechanical characterization
X-ray diffraction

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10.1016/j.msea.2012.01.118

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title = "Dip-coating of boron nitride interphase and its effects on mechanical properties of SiCf/SiC composites",

abstract = "Boron nitride (BN) coatings were successfully synthesized on KD-1 SiC fibers by dip-coating in boric acid and urea solution followed by heat treatment at 1000°C in nitrogen. The SEM micrographs indicated that the BN coating is smooth. The XRD and Raman spectrum results showed that the composition of the coatings is h-BN. The effects of BN interphase on the mechanical properties of 2.5D SiC fiber reinforced CVI-SiC matrix (SiC/SiC) composites were investigated. The results show that the flexural strength of SiCf/SiC composites with and without BN interphase is 170MPa and 60MPa, respectively. And, compared to composites without interphase, the SiCf/SiC composites with BN interphase exhibit an obvious toughened fracture behavior. It is indicated that dip-coating BN interphase can effectively adjust the interfacial bonding strength and improve the mechanical properties of SiCf/SiC composites.",

keywords = "Ceramics, Composites, Mechanical characterization, X-ray diffraction",

author = "Donghai Ding and Wancheng Zhou and Fa Luo and Malin Chen and Dongmei Zhu",

year = "2012",

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doi = "10.1016/j.msea.2012.01.118",

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journal = "Materials Science and Engineering: A",

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T1 - Dip-coating of boron nitride interphase and its effects on mechanical properties of SiCf/SiC composites

AU - Ding, Donghai

AU - Zhou, Wancheng

AU - Luo, Fa

AU - Chen, Malin

AU - Zhu, Dongmei

PY - 2012/5/1

Y1 - 2012/5/1

N2 - Boron nitride (BN) coatings were successfully synthesized on KD-1 SiC fibers by dip-coating in boric acid and urea solution followed by heat treatment at 1000°C in nitrogen. The SEM micrographs indicated that the BN coating is smooth. The XRD and Raman spectrum results showed that the composition of the coatings is h-BN. The effects of BN interphase on the mechanical properties of 2.5D SiC fiber reinforced CVI-SiC matrix (SiC/SiC) composites were investigated. The results show that the flexural strength of SiCf/SiC composites with and without BN interphase is 170MPa and 60MPa, respectively. And, compared to composites without interphase, the SiCf/SiC composites with BN interphase exhibit an obvious toughened fracture behavior. It is indicated that dip-coating BN interphase can effectively adjust the interfacial bonding strength and improve the mechanical properties of SiCf/SiC composites.

AB - Boron nitride (BN) coatings were successfully synthesized on KD-1 SiC fibers by dip-coating in boric acid and urea solution followed by heat treatment at 1000°C in nitrogen. The SEM micrographs indicated that the BN coating is smooth. The XRD and Raman spectrum results showed that the composition of the coatings is h-BN. The effects of BN interphase on the mechanical properties of 2.5D SiC fiber reinforced CVI-SiC matrix (SiC/SiC) composites were investigated. The results show that the flexural strength of SiCf/SiC composites with and without BN interphase is 170MPa and 60MPa, respectively. And, compared to composites without interphase, the SiCf/SiC composites with BN interphase exhibit an obvious toughened fracture behavior. It is indicated that dip-coating BN interphase can effectively adjust the interfacial bonding strength and improve the mechanical properties of SiCf/SiC composites.

KW - Ceramics

KW - Composites

KW - Mechanical characterization

KW - X-ray diffraction

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DO - 10.1016/j.msea.2012.01.118

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SN - 0921-5093

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JO - Materials Science and Engineering: A

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ER -

Dip-coating of boron nitride interphase and its effects on mechanical properties of SiC_f/SiC composites

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Keywords

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