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Creep of plasma-sprayed-ZrO2 thermal-barrier coatings (1982)

Firestone, R. F. ; Bill, R. C., Jr. ; Logan, W. R. ; [et al.]

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Publication Date: 2011-08-18

Description: Specimens of plasma-sprayed-zirconia thermal-barrier coatings with three different porosities and different initial particle sizes were deformed in compression at initial loads of 6900, 13,800, and 24,100 kPa (1000, 2000, and 3500 psi) and temperatures of 1100, 1250, and 1400 C. The coatings were stabilized with lime, MgO, and two different concentrations of Y2O3. Creep began as soon as the load was applied and continued at a constantly decreasing rate until the load was removed. Temperature and stabilization had a pronounced effect on creep rate while the stress, particle size, and porosity had a lesser effect. Creep deformation was due to cracking and particle sliding.

Keywords: NONMETALLIC MATERIALS

Format: text

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