THERMOMECHANICAL TESTS OF A CFC DIVERTOR MOCK-UP

Thermo-mechanical tests have been performed on a divertor mock-up cons isting of a metallic tube armoured with five carbon fibre composite ti les. The tube is inserted inside the tiles and brazed with TiCuSil bra ze (monoblock concept). The tube material is TZM, a molybdenum alloy, and the armour material is SEP CARB N112, a high conductivity carbon-c arbon composite. Using special surface preparation consisting of laser drilling, small (congruent-to 500 mum) holes in the composite have be en made to increase the surface wetted by the braze and the resistance . The mock-up has been tested at the JAERI 400 kW electron beam test f acility JEBIS. The aim of the test was to assess the performance of th e mock-up in screening and thermal fatigue tests with particular atten tion to the behaviour of the armour to heat sink joint.