Dielectric properties of the SiC fiber-reinforced SiC matrix composites with the CVD SiC interphases

被引：102

作者：

Liu, Haitao ^{[1
]}

Cheng, Haifeng ^{[1
]}

Wang, Jun ^{[1
]}

Tang, Gengping ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Aerosp & Mat Engn, Key Lab Adv Ceram Fiber & Composites, Changsha 410073, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 491卷 / 1-2期

关键词：

Ceramics; Vapour deposition; Dielectric response; SiC interphase; CHEMICAL-VAPOR INFILTRATION; SIC/SIC COMPOSITES; MECHANICAL-PROPERTIES; MICROSTRUCTURE; FABRICATION; CERAMICS; POWDER; CARBON; DEPOSITION; COATINGS;

D O I：

10.1016/j.jallcom.2009.09.163

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, the SiC coating was deposited on the KD SiC fiber by CVD (chemical vapour deposition) process. The characteristics of the CVD SiC coating were evaluated by SEM, EDS and XRD analysis. Effects of the CVD SiC interphases on the porosity and dielectric properties of the SiC fiber-reinforced SiC matrix (SiCf/SiC) composites, fabricated by precursor infiltration and pyrolysis (PIP) process, were investigated. The results show that the permittivity of the SiCf/SiC composites with the CVD SiC interphases is very large at X-band, which is owing to the existence of the carbon-rich layers in the CVD SiC interphases. Finally, the microwave absorbing properties of the SiCf/SiC composites were simulated. (c) 2009 Elsevier B.V. All rights reserved.

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页码：248 / 251

页数：4

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