Mechanical properties of a 3D needled C/SiC composite with graphite filler

作者：Cai, Yanzhi; Fan, Shangwu^*; Liu, Heyi; Zhang, Litong; Cheng, Laifei; Jiang, Juan; Dong, Benxing

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2010, 527(3): 539-543.

DOI：10.1016/j.msea.2009.08.031

• Graphite
• C/SiC composite
• Needled
• Mechanical properties

A three-dimensional (3D) needled carbon/carbon (C/C) preform was achieved after one cycle of precursor infiltration-pyrolysis. The mixture of phenolic resin and 8 vol% graphite with an average particle size of 2.5 mu m was employed as the carbon precursor. The C/SiC composite, made from the as-obtained C/C preform infiltrated with liquid silicon, was mechanically characterized under flexural loading. The results show that the material exhibited pseudo-plastic fracture characteristic and had the average strength of 120 MPa. A major portion of the toughness was attributable to fiber elastic bridging and frictional pullout and the crack deflection and pinning in the matrix. Flake graphite had tailored the carbon-rich interfacial layer and increased the toughness of the brittle matrix.

• 出版日期2010-1-15
• 单位西北工业大学