Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8012196 | Transactions of Nonferrous Metals Society of China | 2016 | 12 Pages |
Abstract
C/C-ZrC-SiC composites with different ZrC-SiC contents were fabricated by precursor infiltration and pyrolysis. The effect of ceramic content on the microstructure and ablation resistance was investigated. Both the C/C-SiC and C/C-ZrC-SiC composites exhibited good ablation resistance under the plasma flame above 2300 °C. With the increase of ZrC content, a continuous oxide layer and a solid Zr-Si-O mesophase were formed during the ablation. And the structure of the formed oxides layer closely linked with the contents of ZrC-SiC ceramics. The solid ZrO2-ZrC and Zr-Si-O mesophase could increase the viscosity of SiO2 moderately and improve the anti-scouring ability. The continuous SiO2-ZrO2-ZrC-SiC layer would serve as a thermal and oxygen barrier for preventing the substrate from further ablation. The C/C-ZrC-SiC composites with 27.2% ZrC and 7.56% SiC shows superior ablation resistance, and the mass and linear ablation rates are â3.51 mg/s and â1.88 μm/s, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jun LI, Xin YANG, Zhe-an SU, Liang XUE, Ping ZHONG, Shuai-peng LI, Qi-zhong HUANG, Hong-wei LIU,