Meeting the growing energy demand will require an improvement in the efficiency of fossil fuels and alternative energy systems. Increasing temperature and/or pressure is a straightforward way to do so but it will necessitate new material solutions to ensure component durability in harsh environments. Coating application represents a cost-effective solution, and some aluminide coatings deposited on Fe and Ni-based alloys have indeed demonstrated excellent oxidation resistance in aggressive atmospheres at high temperature. However, the coating impact on the substrate mechanical properties remains a concern. Creep tests have been performed on bare, annealed, and coated Fe and Ni-based alloys at temperature ranging from 600 to 800°C. Results indicate that coating application has a marginal effect on the substrate creep properties as long as the coating is considered as non-load bearing and is deposited at the appropriate temperature. In light of these findings, the potential benefit of coating application on component durability in aggressive environments will be discussed.

Subject
Nickel coatings, Coatings, Materials, Slurry, Substrates, Microstructure, Nickel based alloys, Stress, Commercial alloys, Creep, Aluminum alloys, Alloys, Heat treatment
Keywords:
coating, creep, aluminide, slurry, CVD, heat treatment
© 2012 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2012
Association for Materials Protection and Performance (AMPP)
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