Properties of plasma sprayed yttria stabilized zirconia thermal barrier coating prepared from co-precipitation synthesized powder

Aruna, ST and Paligan, B Arul (2014) Properties of plasma sprayed yttria stabilized zirconia thermal barrier coating prepared from co-precipitation synthesized powder. Ceramics International, 40 . pp. 11157-11162. ISSN 0272-8842

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Official URL: http://dx.doi.org/10.1016/j.ceramint.2014.03.143

Abstract

In the present work, plasma sprayable 8 wt% YSZ powder has been prepared by the co-precipitation method without using any agglomeration process. The suitability of the synthesized YSZ powder for TBC application has been explored by evaluating the properties of the plasma sprayed coating. The powders were characterized for phase, particle size, morphology and flow ability. The plasma sprayed coatings were characterized for microstructure, porosity, hardness, Young's modulus, thermal conductivity and thermal cyclic behavior. Plasma sprayed YSZ coating obtained from the coprecipitation synthesized powders with 15% porosity exhibited a thermal conductivity of 0.75 W/mK at 900 1C. The coating also exhibited good spallation resistance as evident from thermal cycling studies and no phase change was observed during thermal cycling. The thermally grown oxide layer formed during thermal cycles was o5 μm in the coatings subjected to thermal cycles.

Item Type: Article
Additional Information: Copyright to this article belongs to Ms. Elsevier Ltd.
Uncontrolled Keywords: Powders: chemical preparation;Porosity;Thermal conductivity; ZrO2;Engine component
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Ms. Alphones Mary
Date Deposited: 11 Sep 2014 04:38
Last Modified: 11 Sep 2014 04:38
URI: http://nal-ir.nal.res.in/id/eprint/12004

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