SiC/SiCvalues describe: CVI SiC/SiC
Fusion, private
What it enables
Flow channel inserts and blanket internals: chemistry-compatible with liquid metals and lead-lithium, low activation, high temperature.
Status and pusher
Irradiation database growing; joining and hermeticity remain the thesis topics. Pushed by fusion blanket programs with aerospace crossover.
Properties
The values below are candidate: compiled from the sources named, not yet individually validated.
Provisional provenance: EUROfusion and international fusion materials programmes.
Wet cleaning
| Recipe | not established |
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| Forbidden | none noted |
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| Limit | residual porosity of the CVI process |
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Vacuum and outgassing
| Outgassing, unbaked (10 h) | insufficient data |
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| Outgassing, baked | insufficient data |
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| Vapour pressure | none |
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Temperature
| Bake, assembled | 450 °C |
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| Vacuum degas | 1200 °C |
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| Metallurgical limit | service above 1000 °C in fusion conditions |
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Thermal
| CTE | 4.5 ppm/K |
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| Thermal conductivity | 15–30 through thickness W/m·K |
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| Specific heat | 690 J/kg·K |
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| Emissivity | 0.9 |
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| Melting / softening | 2730 dec. °C |
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Mechanical
| Strength | 200–300 flex MPa |
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| Elongation | pseudo-ductile |
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| Young's modulus | 200–300 GPa |
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| Density | 2.5–3.1 g/cm3 |
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Engineering
| Corrosion | good |
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| Process notes | low activation, damage tolerant |
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| Availability and cost | research quantities |
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Sources · 1
- EUROfusion materials program
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