AVS 49th International Symposium
    Surface Engineering Monday Sessions
       Session SE+NS-MoA

Paper SE+NS-MoA5
Enhancement of High Temperature Oxidation Resistance of Fe-Cr-Ni Alloys Using Nanocrystalline CeO2 Coating Synthesized by Microemulsion Technique

Monday, November 4, 2002, 3:20 pm, Room C-111B

Session: Nanoparticle and Nanofiber Surface Technologies
Presenter: S. Seal, University of Central Florida
Authors: S. Seal, University of Central Florida
S. Patil, University of Central Florida
S. Kuiry, University of Central Florida
Correspondent: Click to Email
Fe-Cr-Ni alloys are usually subjected to high temperature oxidation during their various processing stages like rolling, forging and heat treatment. Extensive scaling losses are found to occur in these components in such aggressive environments at elevated temperatures. Therefore, development of coating that imparts oxidation resistance to Fe-Cr-Ni alloys is important not only for applications of these alloys at elevated temperatures but also to protect the oxidation losses during high temperature processing. The present study investigates the effectiveness of nano-sized CeO2 coating to enhance high temperature oxidation resistance of Fe-Cr-Ni alloys. Nanocrystalline CeO2 particles were synthesized with micro-emulsion technique using AOT [sodium bis(2-ethylhexyl) sulphosuccinate] as a surfactant. Kinetics of high temperature oxidation was studied on both bare and coated rectangular specimens in dry air. The scale cross section and surface morphology were characterized by using SEM, EDS, XPS and HRTEM studies.