Abstract
A new technique—series double-pole electro-pulse discharge (SDPEPD)—was developed as a surface coating process. In this process, both positive and negative poles of a pulse power were used as the depositing electrodes with the substrate alloy as an induction electrode. Several ‘‘pin–plate–pin’’settings with the principle of SDPEPD were tested. Micro- and nano-crystalline stainless steel (Fe–18Cr–8Ni) coatings and oxide-dispersed stainless steel coatings were deposited on stainless steel surface. Oxidation at 950 jC in ambient air showed that the coatings greatly improved the oxidation resistance of the steel. The addition of dispersed Y2O3 nano-particles into the alloy coatings was found to further reduce the scaling rate and enhance the oxide spallation resistance. D 2002 Elsevier Science B.V. All rights reserved.
Published Version
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