Zirconia-Alumina Coated Graphite Plates for High-Temperature Sintering
Graphite plates and saggers for high-temperature sintering are plasma-sprayed with zirconia (ZrO2) and alumina (Al2O3) ceramic coatings. The coating layer isolates the graphite from the sintering atmosphere and workpieces, preventing carbon contamination and sticking.
Coating advantages
- Dual-ceramic ZrO2/Al2O3 layer combines thermal insulation with wear resistance
- Prevents carbon migration into sintered products
- Stable in continuous 1,600 °C+ sintering cycles
- Surface roughness optimized to avoid workpiece marking
Process control
- Fine-powder plasma spraying with optimized parameters
- Controlled porosity for low thermal conductivity
- Yttria content adjustable for specific applications
- Sample testing service: send us your workpiece for process trials
Применение
High-temperature sintering of cemented carbide, ceramics and powder metallurgy parts; graphite trays, setter plates and saggars for vacuum and atmosphere furnaces.
