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

• 作 者: Chen Zhiyan Zou Shiqin
• 机 构: School of Materials Science and Engineering,Central South University of Forestry & Technology,Key La
• 出 处: Chinese Forestry Science and Technology
• 发表日期: 2012年03期
• 关键词: heating toughness pyrolysis infiltration properly dried vacuum

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 1000 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.