Effects of Heating Rate on Properties and Structures of 3D-Cf/SiC Composites by PIP Process  

作　　者：Chen Zhiyan Zou Shiqin 

机构地区：[1]School of Materials Science and Engineering,Central South University of Forestry & Technology [2]Key Laboratory of National Defense Technology,College of Aerospace & Materials Engineering,National University of Defense Technology

出　　处：《Chinese Forestry Science and Technology》2012年第3期75-75,共1页中国林业科技（英文版）

摘　　要：The properties and structures of 3D-Cf/ SiC composites prepared by rapid precursor infiltration pyrolysis process were studied.PCS solution was infiltrated into 3D-carbon fiber perform in vacuum,then these performs were dried at room temperature and pyrolyzed with three kinds of heating rate,3 900 min,1 500 min and 1 000 min respectively.The distinction of 3D-Cf/SiC samples fabricated at three kinds of heating rate was not obvious.Bending strength of sample at 1 000 min heating rate was 762.5 MPa,and a little better than the others.Three samples at various heating rate had similar micro-graph of fracture surface and fracture toughness.The research results show that mechanics performances of Cf/SiC composites did not decrease when heating rate was properly increased.The properties and structures of 3D-Cf/ SiC composites prepared by rapid precursor infiltration pyrolysis process were studied.PCS solution was infiltrated into 3D-carbon fiber perform in vacuum,then these performs were dried at room temperature and pyrolyzed with three kinds of heating rate,3 900 min,1 500 min and 1 000 min respectively.The distinction of 3D-Cf/SiC samples fabricated at three kinds of heating rate was not obvious.Bending strength of sample at 1 000 min heating rate was 762.5 MPa,and a little better than the others.Three samples at various heating rate had similar micro-graph of fracture surface and fracture toughness.The research results show that mechanics performances of Cf/SiC composites did not decrease when heating rate was properly increased.

关 键 词：CF/SIC COMPOSITES POLYCARBOSILANE precursor INFILTRATION PYROLYSIS high-speed PYROLYSIS 

分 类 号：S7[农业科学—林学]