• SiC reinforced pyrolytic graphite (PyG) coating significantly enhances corrosion resistance in SiC vapor environments at ultra-high temperatures (2050°C for 120 h).
• The addition of SiC particles improves the graphitization degree and structural stability of PyG coatings, leading to a more intact protective layer.
• Raman spectroscopy analysis shows a 17.2% reduction in ID/IG ratio for SiC-reinforced PyG coating, compared to 6.5% for plain PyG, indicating superior corrosion resistance.
• This work provides a theoretical foundation for using SiC-reinforced PyG coatings to protect graphite components in SiC single crystal growth via PVT method.