Mechanical Properties of 2D C-f/SiC Composites Fabricated by Precursor Pyrolysis

作者：Jian Ke^*; Liu Jingyu; Chen Zhaohui; Ma Qingsong

来源：Rare Metal Materials and Engineering, 2008, 37: 224-227.

• 2D C-f/SiC composites
• precursor pyrolysis
• mechanical properties
• fiber damage
• interface bonding

Two-dimensional carbon fiber cloth reinforced silicon carbide (2D C-f/SiC) composites were fabricated by hot-pressed assisted precursor pyrolysis and precursor infiltration and pyrolysis respectively, with 3k JC1# carbon fiber cloth as reinforcement, polycarbosilane (PCS) as precursors and SiC particles as inert fillers. The fibers in the composites fabricated by hot-pressed assisted process were damaged seriously with many pores in the matrix, and the flexural strength and fracture toughness of the composites were only 84.3MPa and 6.5MPa.m(1/2), respectively. The composites fabricated by precursor infiltration and pyrolysis exhibited much better interface bonding and little fiber damage, and the mechanical properties of the composites increased, with the flexural strength and fracture toughness reaching 321.6 MPa and 17.8 MPa.m(1/2), respectively.

• 出版日期2008-1
• 单位长沙学院; 中国人民解放军国防科学技术大学