  The two years experience with Active Metal Casting flat bonds shows that this
technology is suitable for the heat fluxes expected in Tore Supra (10
MW/m${}^2$). Tests were pursued up to 3330 cycles, with elements still
functional. At higher heat fluxes, fatigue damage is observed, but the bond
resists remarkably well with no tile detachment. Examination of such
deliberately damaged bonds showed distributed cracking, proving the absence of
any weak link. The limitations to those higher heat fluxes are more related to
the design and the base materials than to the bond itself.
