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Influence of Glass Content on Damping Properties of Plasma-Sprayed Mixtures of Zirconia and Glass

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Abstract

The addition by vacuum infiltration of small quantities of a polymer has been found to increase significantly the ability of a plasma-sprayed coating to dissipate vibratory energy at temperatures in the glassy-rubbery transition range of the polymer. As vitreous enamels and glasses undergo a glassy transition, but at much higher temperatures, the addition of a small amount of glass to a ceramic has the potential of providing high damping at such temperatures. Mixtures of yttria-stabilized zirconia (YSZ) and a glass frit were plasma sprayed on specimens with bond coats. Measures of system response (resonant frequencies and loss factors) were extracted from frequency responses to excitations of cantilever beam specimens over a range of excitation amplitudes. Comparisons of values determined before and after coating were used to determine the damping properties of the coatings alone as functions of strain, at temperatures of special interest. Emphasis was given to identifying the lowest level of glass giving significantly more damping than that of the plasma-sprayed ceramic alone. Coatings with weight fractions of 5, 2, 1, ½, and 0% glass were tested. The inclusion of glass at all weight fractions considered was found to yield significant increases in both the stiffness and dissipation of the coatings.

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Acknowledgments

The authors gratefully acknowledge the contributions of Mr. Ahid Nashif for the development of these coatings and of Mr. Jason Hansel, Universal Technology Corporation, for the performance of tests using the resources of the Turbine Engine Fatigue Facility, Wright-Patterson AFB, OH. Support for this study was provided by Army SBIR Phase II Contract No. W911W6-07-C-0043 “Advanced Damping Technologies for Small Turbine Engines,” with Anastasia Kozup, USA, AMC, as the technical point of contact. The prime contractor, APS Materials, Inc., Dayton, OH, provided all test materials and permission to publish these results.

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  1. 1866 Winchester Road, Xenia, OH, 45385, USA

    P. J. Torvik

  2. Universal Technology Corporation, 1270 N. Fairfield Rd., Dayton, OH, 45432, USA

    J. P. Henderson

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  1. P. J. Torvik
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  2. J. P. Henderson
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Correspondence to P. J. Torvik.

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Torvik, P.J., Henderson, J.P. Influence of Glass Content on Damping Properties of Plasma-Sprayed Mixtures of Zirconia and Glass. J. of Materi Eng and Perform 21, 1405–1415 (2012). https://doi.org/10.1007/s11665-011-0011-4

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  • DOI: https://doi.org/10.1007/s11665-011-0011-4

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