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Flexible ultrasonic transducer (UT) arrays consisting of a thin substrate, a bottom electrode if the substrate is an insulator, a piezoelectric composite ceramic layer and a top electrode with a total thickness less than 100 mum have been produced. A stainless steel foil, aluminum foil and polyimide film were used as a substrate. On top of the polyimide film a thin (<1 mum thick) nickel alloy layer...
For better oxidation resistance of refractory metals in air, the electroless coating of silicide in the molten salt was developed in open air at 973–1173K. The molten salt consists of NaCl, KCl, Na 2 SiF 6 and Si powder, where the proportional reaction between Si and Si 4+ ions forms Si 2+ ions. Si 2+ deposits on the metal substrate and forms the metal silicide...
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