A study has been made to relate the erosion behavior of several experimental zirconia-base ceramic thermal barrier coatings to their processing parameters and microstructure. The incremental erosion rates were measured and each specimen was examined using optica and scanning electron microscopy. Erosion experiments were conducted in a room temperature erosion test apparatus using 63-100μm silica erodent particles with impact velocities of 30mps (~100fps). Erosion rates in the steady state condition are presented for impingement angles of 30 and 90 degrees. It has been determined that significant differences in erosion rate occurred due to processing parameter variations, composition and resulting coating morphology. Initial erosion rates were found to be strongly dependent on surface roughness while steady state erosion appears to be more dependent on intrinsic coating properties and porosity.

Subject
Materials, Spray coating, Roughness, Plasma, Surfaces, Porosity, Deposition rate, Erosion, Ceramics, Surface profile, Hardness, Barrier coatings, Coating systems
© 1984 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).
1984
Association for Materials Protection and Performance (AMPP)
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