%0 Journal Article
%T Microstructure and Mechanical Properties of C/C Composites with a Mesophase Pitch Transition Layer<br>具有中间相沥青过渡层的炭/炭复合材料的微观结构与力学性能
%A LIU Hao
%A LI Ke-Zhi
%A LI He-Jun
%A LU Jin-Hua
%A ZHAI Yan-Qiang
%A <br>刘 皓
%A 李克智
%A 李贺军
%A 卢锦花
%A 翟言强
%J 无机材料学报
%D 2008
%I Science Press
%X Carbon/carbon (C/C) composites, with a mesophase pitch transition layer between carbon fiber and pyrocarbon, were prepared by two step technique of liquid impregnation-carbonization and chemical vapor infiltration (CVI). The microstructure and mechanical properties of the as-obtained composites were studied by polarized light microscope (PLM), scanning electron microscope (SEM), conventional and high resolution transmission electron microscope (TEM, HRTEM) and mechanical properties tests, respectively. Results show that the mesophase pitch carbon exhibits lamellar structure, while the pyrocarbon exhibits like-crinkle lamellar structure under SEM and the granular structure under TEM. Under HRTEM, the degree of alignment of lattice fringes decreases gradually for mesophase pitch carbon, pyrocarbon and carbon fiber. The non-brittle fracture behavior of the composites is related to multiple crack deflections caused by the multi-interface and micro-cracks within the matrix carbon layer. The flexural strength and the fracture toughness (KIC) of C/C composites are 244MPa and 9.7MPa·m1/2, respectively.
%K carbon/carbon composites
%K mesophase pitch
%K microstructure
%K transition layer
%K mechanical properties<br>炭/炭复合材料
%K 中间相沥青
%K 微观结构
%K 过渡层
%K 力学性能
%K 中间相沥青
%K 过渡层
%K 炭复合材料
%K 微观结构
%K 力学性能
%K Mechanical
%K Properties
%K Microstructure
%K Transition
%K Layer
%K Mesophase
%K Pitch
%K 断裂韧性
%K 抗弯强度
%K 断裂特征
%K 韧性破坏
%K 材料表现
%K 长度
%K 纤维拔出
%K 断裂形式
%K 锯齿状
%K 断口形貌
%K 扩展速度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=9B69FB3B2411FE233C14A3D546725658&yid=67289AFF6305E306&vid=EA389574707BDED3&iid=38B194292C032A66&sid=8C8D895E58E44DBB&eid=D397660E39E3E461&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=0&reference_num=11