Abstract
NiCrAlY coatings were deposited on superalloy GH4169 by electrospark deposition technique. Influences of the depositing parameters (100 V/40 μF, 100 V/80 μF, 100 V/120 μF, 150 V/40 μF, 150 V/80 μF, 150 V/120 μF) on the microstructure and the properties of the coatings were experimentally investigated. Results show that the depositing parameters affect defect density and consequent properties of coatings. The deposition voltage has greater influences on the deposition velocity and on the properties of the coatings than the deposition capacity. The weight gain per area of the coatings deposited under 150 V increases faster than that under 100 V. The coating deposited under 100 V/40 μF has the minimum defect density and the best properties.
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