Wf/Wvalues describe: Wf/W
Fusion, private
What it enables
Fixes tungstens brittleness with fiber or laminate toughening.
Status and pusher
Lab-scale mock-ups under high heat flux testing. Pushed by Juelich and EU labs.
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 |
|---|
| Forbidden | none noted |
|---|
| Limit | interface integrity |
|---|
Vacuum and outgassing
| Outgassing, unbaked (10 h) | insufficient data |
|---|
| Outgassing, baked | insufficient data |
|---|
| Vapour pressure | as tungsten |
|---|
Temperature
| Bake, assembled | 450 °C |
|---|
| Vacuum degas | 1500 °C |
|---|
| Metallurgical limit | as W, with the interface as the weak point |
|---|
Thermal
| CTE | 4.5 ppm/K |
|---|
| Thermal conductivity | ~150 W/m·K |
|---|
| Specific heat | 132 J/kg·K |
|---|
| Melting / softening | 3422 °C |
|---|
Mechanical
| Elongation | pseudo-ductile |
|---|
| Density | ~18 g/cm3 |
|---|
Electrical and magnetic
| Relative permeability | ~1.0 |
|---|
Engineering
| Process notes | solving the brittleness that limits bulk tungsten |
|---|
| Availability and cost | research |
|---|
Sources · 1
- Juelich plasma-facing materials
← The Matter