Properties of plasma sprayed La2Zr2O7 coating fabricated from powder synthesized by a single-step solution combustion method
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
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| Title |
Properties of plasma sprayed La2Zr2O7 coating fabricated from powder synthesized by a single-step solution combustion method
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| Creator |
Aruna, ST
Sanjeeviraja, C Balaji, N Manikandanath, NT |
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| Subject |
Chemistry and Materials (General)
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| Description |
In recent years, rare earth zirconates with the general formula Ln2Zr2O7 have been investigated as futuristic
thermal barrier coatings (TBCs). In the present study, the use of solution combustion process for the preparation
of plasma sprayable grade La2Zr2O7 powder is reported. The powder was prepared by using urea as fuel in a single-step without using spray drying process. The powder was characterized for phase, morphology, flowability and particle size analysis by using powder X-ray diffractometry, field emission scanning electron
microscopy (FESEM), a Hall flow meter and a particle size analyzer respectively. The powder was plasma
sprayed and the phase purity of the plasma sprayed coating was analyzed by X-ray diffractometry. A Rietveld
analysis of the coating was performed in order to understand the shift in the peak positions of the coating.
The analysis revealed the coating to be a mixture of La2Zr2O7, La2O3 doped ZrO2 and ZrO2. The coating surface
and cross-section were analyzed by FESEM. The density of the free-form of the coating was determined and the thermal conductivity of the coating was measured at 900 °C. The coating exhibited a conductivity value of 1.08 W m−1 K−1.
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| Publisher |
Elsevier Science B.V
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| Date |
2013
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| Type |
Journal Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/11506/1/aruna.pdf
Aruna, ST and Sanjeeviraja, C and Balaji, N and Manikandanath, NT (2013) Properties of plasma sprayed La2Zr2O7 coating fabricated from powder synthesized by a single-step solution combustion method. Surface & Coating Technology , 219 . pp. 131-138. |
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| Relation |
http://nal-ir.nal.res.in/11506/
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