首页|Fabrication of Self-Healing Ceramic Coatings Against Oxidation for Carbon/Carbon Composites Using Polysilazane and B_4C Filler
Fabrication of Self-Healing Ceramic Coatings Against Oxidation for Carbon/Carbon Composites Using Polysilazane and B_4C Filler
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NETL
NSTL
Trans Tech Publications Ltd
The self-healing ceramic coating against oxidation for carbon/carbon composites was fabricated via preceramic polymer pyrolysis process using polysilazane as preceramic and B_4C powder as filler. By means of SEM and XRD, the phase composition and the microstructure of coatings were characterized, and preliminarily study on its anti-oxidation ability and thermal shock resistance was conducted. The results showed that the parameters including content of B_4C, coating thickness, number of times of coating/pyrolysis play an important role on anti-oxidation ability of coatings. The optimal anti-oxidation ability was obtained when the content of B_4C reached 50wt%, the number of times of coating/pyrolysis reached three and 1200℃ was chosen as pyrolysis temperature. The thermal shock resistance test was conducted 50 times and the weight loss rate was 7.14% at 1000℃, which proved that the thermal shock resistance was excellent.
self-healingcoatingsC/C compositesfiller
Chunying Tian、Hongli Liu
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College of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
NETL
NSTL
Trans Tech Publications Ltd
