SiCN-based composite ceramics fabricated by chemical vapor infiltration with excellent mechanical and electromagnetic properties

Fang Ye; Litong Zhang; Xiaowei Yin; Xiaofei Liu; Yongsheng Liu; Jimei Xue; Laifei Cheng

doi:10.1016/j.matlet.2013.08.082

SiCN-based composite ceramics fabricated by chemical vapor infiltration with excellent mechanical and electromagnetic properties

Fang Ye, Litong Zhang, Xiaowei Yin, Xiaofei Liu, Yongsheng Liu, Jimei Xue, Laifei Cheng

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

28 Scopus citations

Abstract

A novel SiCN ternary phase was introduced into porous Si₃N ₄ preform by chemical vapor infiltration from SiCl₄-C ₃H₆-NH₃-H₂-Ar, which was used to fabricate Si₃N₄-SiCN composite ceramics. SiCN was composed of amorphous Si₃N₄ matrix and crystalline SiC nano-particles (with a homogeneous size of ~5 nm) uniformly distributed in amorphous matrix. This distinctive microstructure made the Si₃N ₄-SiCN ceramics not only maintain a high flexural strength of 227 MPa but realize a low dielectric constant and a high dielectric loss, which led to a minimal electromagnetic wave reflection coefficient of -42.6 dB, ranking the best level in the already-reported structural and wave-absorbing ceramic materials for high-temperature applications.

Original language	English
Pages (from-to)	169-172
Number of pages	4
Journal	Materials Letters
Volume	111
DOIs	https://doi.org/10.1016/j.matlet.2013.08.082
State	Published - 2013

Keywords

CVI
Electromagnetic property
Mechanical property
SiCN

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10.1016/j.matlet.2013.08.082

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title = "SiCN-based composite ceramics fabricated by chemical vapor infiltration with excellent mechanical and electromagnetic properties",

abstract = "A novel SiCN ternary phase was introduced into porous Si3N 4 preform by chemical vapor infiltration from SiCl4-C 3H6-NH3-H2-Ar, which was used to fabricate Si3N4-SiCN composite ceramics. SiCN was composed of amorphous Si3N4 matrix and crystalline SiC nano-particles (with a homogeneous size of ~5 nm) uniformly distributed in amorphous matrix. This distinctive microstructure made the Si3N 4-SiCN ceramics not only maintain a high flexural strength of 227 MPa but realize a low dielectric constant and a high dielectric loss, which led to a minimal electromagnetic wave reflection coefficient of -42.6 dB, ranking the best level in the already-reported structural and wave-absorbing ceramic materials for high-temperature applications.",

keywords = "CVI, Electromagnetic property, Mechanical property, SiCN",

author = "Fang Ye and Litong Zhang and Xiaowei Yin and Xiaofei Liu and Yongsheng Liu and Jimei Xue and Laifei Cheng",

year = "2013",

doi = "10.1016/j.matlet.2013.08.082",

language = "英语",

volume = "111",

pages = "169--172",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - SiCN-based composite ceramics fabricated by chemical vapor infiltration with excellent mechanical and electromagnetic properties

AU - Ye, Fang

AU - Zhang, Litong

AU - Yin, Xiaowei

AU - Liu, Xiaofei

AU - Liu, Yongsheng

AU - Xue, Jimei

AU - Cheng, Laifei

PY - 2013

Y1 - 2013

N2 - A novel SiCN ternary phase was introduced into porous Si3N 4 preform by chemical vapor infiltration from SiCl4-C 3H6-NH3-H2-Ar, which was used to fabricate Si3N4-SiCN composite ceramics. SiCN was composed of amorphous Si3N4 matrix and crystalline SiC nano-particles (with a homogeneous size of ~5 nm) uniformly distributed in amorphous matrix. This distinctive microstructure made the Si3N 4-SiCN ceramics not only maintain a high flexural strength of 227 MPa but realize a low dielectric constant and a high dielectric loss, which led to a minimal electromagnetic wave reflection coefficient of -42.6 dB, ranking the best level in the already-reported structural and wave-absorbing ceramic materials for high-temperature applications.

AB - A novel SiCN ternary phase was introduced into porous Si3N 4 preform by chemical vapor infiltration from SiCl4-C 3H6-NH3-H2-Ar, which was used to fabricate Si3N4-SiCN composite ceramics. SiCN was composed of amorphous Si3N4 matrix and crystalline SiC nano-particles (with a homogeneous size of ~5 nm) uniformly distributed in amorphous matrix. This distinctive microstructure made the Si3N 4-SiCN ceramics not only maintain a high flexural strength of 227 MPa but realize a low dielectric constant and a high dielectric loss, which led to a minimal electromagnetic wave reflection coefficient of -42.6 dB, ranking the best level in the already-reported structural and wave-absorbing ceramic materials for high-temperature applications.

KW - CVI

KW - Electromagnetic property

KW - Mechanical property

KW - SiCN

UR - http://www.scopus.com/inward/record.url?scp=84884339631&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2013.08.082

DO - 10.1016/j.matlet.2013.08.082

M3 - 文章

AN - SCOPUS:84884339631

SN - 0167-577X

VL - 111

SP - 169

EP - 172

JO - Materials Letters

JF - Materials Letters

ER -

SiCN-based composite ceramics fabricated by chemical vapor infiltration with excellent mechanical and electromagnetic properties

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Keywords

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