ACX connects qualified materials, precision machining, carbon-composite processing and measurement in one manufacturing platform.
High-purity graphite components machined and engineered for demanding thermal and electrical performance in crystal-growth hot zones.
3D braided carbon-carbon composites engineered for strength, thermal performance and productivity in high-cycle production environments.
Wet-formed short-fiber insulation designed to reduce conventional laminate interfaces and improve resistance to delamination.
Engineered ceramic components supporting the hot zone's thermal management and process-atmosphere requirements.
Same customer · same process · same failure-prone sampling location.
Vendor A Sample 3 failed before a valid bending-strength reading could be obtained.
~95% higher average residual bending strength among measurable samples.
Residual strength after service
Supports faster heat transfer
~1.5–2 kW observed
Up to 8% where applicable
Test samples were taken from used susceptors returned by the same customer and operated in the same crystal-growth process; samples were cut from the same lower-corner region of the straight wall.
Soft felt → resin impregnation → layer stacking + hot pressing.
Result: laminated structure with layer interfaces.
Short fibers → wet dispersion → vacuum forming directly in mold.
Result: integrated molded structure with no conventional laminate interfaces.
Wet forming changes the material architecture itself — reducing conventional layer interfaces and supporting improved resistance to delamination.
| Property | Laminated Rayon | Short-Fiber Rayon |
|---|---|---|
| Temperature | 2200°C | 2000°C |
| Carbon Content | >99.8% | >99.8% |
| Thermal Conductivity | 0.45–0.55 W/m·K | <0.3 W/m·K |
| Density | >0.2 g/cm³ | 0.13–0.2 g/cm³ |
| Ash | <500 ppm | <200 ppm |
Representative manufacturing steps in the composite-processing sequence.
Representative needle-punch process. This image does not show ACX proprietary 3D braiding.
Composite densification and thermal processing.
Japan + U.S. graphite · Korean carbon fiber supply in the U.S.
Large-scale machining of graphite components.
Precision milling of graphite heater geometry.
Quarter heater ring shaped by wire saw.