Hard ceramic coatings: an experimental study on a novel damping treatment

Sophoclis Patsias; Nicola Tassini; Roger Stanway

doi:10.1117/12.538743

29 July 2004 Hard ceramic coatings: an experimental study on a novel damping treatment

Sophoclis Patsias, Nicola Tassini, Roger Stanway

Proceedings Volume 5386, Smart Structures and Materials 2004: Damping and Isolation; (2004) https://doi.org/10.1117/12.538743
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

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.

Citation Download Citation

Sophoclis Patsias, Nicola Tassini, and Roger Stanway "Hard ceramic coatings: an experimental study on a novel damping treatment", Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); https://doi.org/10.1117/12.538743

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