Abstract
Ta-rich surface alloys have been prepared directly on GCr15 bearing steel (corresponding to AISI52100 steel) substrates by the dynamic ion beam mixing technique. An amorphous alloy film of a given composition can be formed when the deposition temperature and the atom-ion arrival ratio are controlled appropriately. The microstructure and composition of such films were examined using TEM, EDX and XPS. Corrosion tests in H 2SO 4 and NaCl solutions, as well as friction and wear tests have shown that the amorphous GCr15Ta alloy films formed by this technology have superior chemical and physical properties.
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