 
  
| 1. Low material density | 2, good friction and wear performance | 3. High strength and high modulus at high temperatures | 
| 4, ablation and erosion resistance 7, excellent dimensional stability | 5, excellent thermal conductivity | 6, low thermal expansion coefficient | 
| 7, excellent dimensional stability | 8. Chemically inert | 9, large fracture toughness | 
| 10, high thermal stability | 11, excellent thermal shock resistance | 12, excellent conductivity and controllability of resistance | 
| 13. High purity of materials | 14, low life cycle cost |