%0 Journal Article
%T Microstructures, Strength and Toughness of 2D Cf/(C-SiC) Composites by Chemical Vapor Infiltration<br>化学气相浸渗2D Cf/(SiC-C)复合材料的微观结构与强韧性
%A MENG Zhi-Xin
%A CHENG Lai-Fei
%A ZHANG Li-Tong
%A XU Yong-Dong
%A HAN Xiu-Feng
%A <br>孟志新
%J 无机材料学报
%D 2009
%I Science Press
%X Two dimensional carbon fiber-reinforced silicon carbide-carbon binary matrix composites (2D Cf/(SiC-C)) were fabricated by means of isothermal and isobaric chemical vapor infiltration (ICVI). The matrix structures of the 2D Cf/(SiC-C) composites were characterized by the backscattered electron imaging (BSE) of scanning electron microscope (SEM). Furthermore, their room temperature mechanical properties and fracture surfaces were compared with two dimensional carbon fiber-reinforced silicon carbide matrix composite (2D Cf/SiC). The results indicate that the matrices in the 2D Cf/(SiC-C) composites are multilayered structures composed of SiC and PyC layers. The PyC matrix layers are homogeneous and continuous, which are bonding well with SiC matrix layers. The 2D Cf/(SiC-C) composite with a thicker PyC matrix layer in fiber bundles exhibits better mechanical properties. Meanwhile, its tensile strength, failure strain, fracture toughness and fracture work are 3%, 142%, 22% and 58% higher than those of the 2D Cf/SiC composite, respectively. The multilayered matrices composed of SiC and PyC layers, cause the fibers in the 2D Cf/(C-SiC) composites to pull out twice in a concentrated mode. Moreover, the first pull-out fibers play a leading role in enhancing the strength and toughness.
%K binary matrix composites
%K microstructure
%K strength and toughness
%K chemical vapor infiltration<br>二元基复合材料
%K 微观结构
%K 强韧性
%K 化学气相浸渗
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=DB814B01B80BC6F5833426CC7C7AE81F&yid=DE12191FBD62783C&vid=B91E8C6D6FE990DB&iid=94C357A881DFC066&sid=384C451D3BE0C38C&eid=72D13CE6C162BDF4&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=0&reference_num=15