PRELIMINARY-RESULTS FOR YBCO THICK-FILMS SPRAYED ON STAINLESS-STEEL WITH THE HVOF TECHNIQUE, AND FOR MULTILAYERS USING AG OR CUO

YBCO thick films were sprayed on amagnetic stainless steel containing chromium with the continuous-detonation spray technique. The presence of chromium requires a buffer layer to be sprayed between the metal an d the superconductor. Preliminary results using a nickel-based buffer layer are reported, which show a shielding effectiveness comparable wi th that of coatings made with the same technique on silver. Preliminar y results on multilayers, using YBCO and either silver or CuO as inter spacing layer, are reported. The main problem which arises is the lack of full oxygenation of the underneath YBCO layers.