AN YTTRIA STABILIZED ZIRCONIA REINFORCED NICKEL-COBALT BASED METAL MATRIX COMPOSITE AND METHOD FOR THE PREPARATION THEREOF

摘要

Present invention discloses Ni-Co-YSZ based wear-resistant and fuel-efficient composite coating for enhancing the life of automobile engines and coating prepared thereof. Coating is essentially consisting of Nickel - Cobalt matrix reinforced with 8mol% yttria stabilized zirconia. Nickel - Cobalt metal matrix coating reinforced with YSZ particles reduces the wear loss and the fuel consumption. Wear-resistant and fuel-efficient coating of present invention is prepared by a simple and cost-effective process of electrodeposition on a metal or alloy substrate acting as a cathode in an electroplating bath containing the salts of Ni, Co, a buffer, YSZ particles and a surface active agent. The obtained coating reduces the wear loss of the engine cylinders in the order of 3 to 4% and reduction in fuel consumption up to 10% compared to uncoated cylinders.