Electrospark deposition (ESD) was developed in the Soviet Union and came to the USA when one of the national laboratories, used it for depositing zirconium on stainless steel. This is a good technique to put a metallic or a cermet such as WC, TiB on a component for wear resistance. The mechanical engineers have not caught on to this in preference to the more exotic PVD, CVD, and laser deposition. The technique can complement laser alloying by first depositing a metal, alloy or an electrically conducting cermet on the surface and then zapping with a laser to form a metallurgical bond. I would like to know if there are other applications of ESD, which can reduced wear of components or in such application as depositing a high conductivity metal for improved electrical contact
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