Acta Metallurgica Sinica (English Letters) ›› 2002, Vol. 15 ›› Issue (4): 331-338 .

• Research Articles •     Next Articles

Fe-Cr-Y2O3 MICRO-CRYSTALLINE COATINGS DEPOSITED BY SERIES ELECTRO-PULSE DISCHARGE

Q. Xu, Y.D. He, D.R. Wang   

  1. Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, University of Science and Tech-nology Beijing, Beijing 100083, China
  • Received:2001-09-11 Revised:2001-12-03 Online:2002-08-25 Published:2009-10-10
  • Contact: Q. Xu

Abstract: A new technique - series electro-pulse discharge (SEPD) - was developed as a sur-face coating process. In this technique, both positive and negative poles of a pulsepower were used as the depositing electrodes with the substrate alloy as an induction electrode. Fe-Cr and Fe-Cr-Y2 O3 micro-crystalline coatings were deposited on stain-less steel (Fe-18Cr-8Ni) surfaces. Oxidation at 950℃ in ambient air showed that the coatings greatly improved the oxidation resistance of the steel. The addition of dis- persed Y2O3 nano-particles into the alloy coatings was found to further reduce the scaling rate and enhance the adhesion of oxide scales.

Key words: series electro-pulse discharge, high-temperature oxidat