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Proceedings Paper

Hard ceramic coatings: an experimental study on a novel damping treatment
Author(s): Sophoclis Patsias; Nicola Tassini; Roger Stanway
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Paper Abstract

This paper describes a novel damping treatment, namely hard ceramic coatings. These materials can be applied on almost any surface (internal or external) of a component. Their effect is the significant reduction of vibration levels and hence the extension of life expectancy of the component. The damping features of air-plasma-sprayed ceramic coatings (for example amplitude dependence, influence of initial amplitude) are discussed and the experimental procedure employed for testing and characterising such materials is also described. This test procedure is based around a custom-developed rig that allows one to measure the damping (internal friction) of specimens at controlled frequencies, strain amplitudes and, if required, various temperatures. A commonly used Thermal Barrier Coating, Yttria Stabilised Zirconia (8%), is used to demonstrate the above mentioned features. The damping effectiveness of this coating is then compared against two established damping treatments: polymer Free Layer Damping (FLD) and Constrained Layer Damping (CLD). The paper discusses the major issues in characterising ceramic damping coatings and their damping effectiveness when compared against the "traditional" approaches. Finally, the paper concludes with suggestions for further research.

Paper Details

Date Published: 29 July 2004
PDF: 11 pages
Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); doi: 10.1117/12.538743
Show Author Affiliations
Sophoclis Patsias, Univ. of Sheffield (United Kingdom)
Nicola Tassini, Univ. of Sheffield (United Kingdom)
Roger Stanway, Univ. of Sheffield (United Kingdom)

Published in SPIE Proceedings Vol. 5386:
Smart Structures and Materials 2004: Damping and Isolation
Kon-Well Wang, Editor(s)

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