Performance of brazed graphite, carbon-fiber composite, and TZM materials for actively cooled structures; Qualification tests
- Osterreichisches Forschungzentrum, A-2444 Seibersdorf (AT)
- Sandia National Lab., Albuquerque, NM (US)
- Forschungszentrum Julich GmbH, D-5170 Julich (DE)
- NET Team, D-8046 Garching (DE)
- Metallwerk Plansee GmbH, A-6600 Reutte (AT)
The divertor of a near-term fusion device has to withstand high heat fluxes, heat shocks, and erosion caused by the plasma. Furthermore, it has to be maintainable through remote techniques. Above all, a good heat removal capability across the interface (low-Z armor/heat sink) plus overall integrity after many operational cycles are needed. To meet all these requirements, an active metal brazing technique is applied to bond graphite and carbon-fiber composite materials to a heat sink consisting of a Mo-41Re coolant tube through a TZM body. Plain brazed graphite and TZM tiles are tested for their fusion-relevant properties. The interfaces appear undamaged after thermal cycling when the melting point of the braze joint is not exceeded and when the graphite armor is {gt}4 mm thick. High heat flux tests are performed on three actively cooled divertor targets. The braze joints show no sign of failure after exposure to thermal loads {approximately}25% higher than the design value surface heat flux of 10 MW/m{sup 2}.
- OSTI ID:
- 6091976
- Journal Information:
- Fusion Technology; (United States), Journal Name: Fusion Technology; (United States) Vol. 19:4; ISSN 0748-1896; ISSN FUSTE
- Country of Publication:
- United States
- Language:
- English
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BRAZING
CARBON
DESIGN
DIVERTORS
ELEMENTAL MINERALS
ELEMENTS
FABRICATION
GRAPHITE
HEAT FLUX
JOINING
MELTING POINTS
MINERALS
NONMETALS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
REACTOR COMPONENTS
TESTING
THERMAL CYCLING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WELDING