Open AccessEffect of Pyrolytic Carbon Coating on Properties of Cf/C-SiC-ZrC Ceramic Matrix Composites
Author(s) -
Chenhan Su,
Ying Zhou,
Kai Jiang,
Feifei Yang,
Haiming Xu,
Chang Ling Zhou,
F. T. Liu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/678/1/012067
Subject(s) - pyrolytic carbon , materials science , composite material , chemical vapor infiltration , flexural strength , ceramic matrix composite , fracture toughness , coating , composite number , microstructure , ceramic , pyrolysis , zirconium carbide , reinforced carbon–carbon , carbon fibers , carbide , chemical engineering , engineering
In this paper, C f -SiC-ZrC, C f /C-SiC-ZrC composites which the pyrolytic carbon (PyC) coating with the thickness of 0.1 μm, 0.3 μm and 0.5 μm were prepared by chemical vapor deposition (CVD) process combined with precursor infiltration and pyrolysis (PIP) process. Then, SEM, XRD and other methods were used to test the microstructure, flexural strength, fracture toughness and static oxidation of the composites. The results show that after the CVD process, PyC with higher degree of graphitization is deposited on the carbon fiber surface, which can avoid damage to the carbon fiber caused by the PIP process for preparing the ceramic matrix composite. The mechanical properties and oxidation resistance of C f /C-SiCZrC ceramic matrix composites are higher than C f -SiC-ZrC composites, and the flexural strength reached 283 MPa, the fracture toughness reached 4.40 MPa•m 1/2 . After oxidation for 30 min at 1400°C, we found that the composite with PyC coating of 0.3 μm had good oxidation resistance.