Abstract
Precursor content is a key to control ablation resistance of CLVD-C/C-SiC-ZrC composites. The ceramic content of the composites prepared with 20 wt% precursor was only 8.38 vol%, so an oxide protective coating was not formed. High-content precursors promoted the formation of oxide coating, especially the composites prepared with 50 wt% precursor had a complete oxide coating. Thus, mass and line ablation rates were only 0.64 mg/s and 0.45 µm/s. When precursor content was 65 wt%, the composites had high-content ceramics, but porosity was great and many pores and cracks acted as channels for oxygen diffusion, causing a poor ablation resistance.
Original language | English |
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Article number | 111584 |
Journal | Corrosion Science |
Volume | 225 |
DOIs | |
State | Published - Dec 2023 |
Keywords
- Ablative resistance
- C/C-SiC-ZrC
- CLVD process
- Microstructure
- Precursor content