Abstract
RF precursor plasma spray synthesis (RFPPS) is an innovative and rapid technique to deposit functional oxide coatings by starting from liquid inorganic precursors and directly producing ceramic coatings. RFPPS offers excellent opportunities in exploring the nonequilibrium phase evolution during plasma spraying of molecularly mixed precursors to form multicomponent oxides. A detailed discussion of progress, critical issues and consideration in precursor development, RF plasma spraying, coating development, and phase evolution of yttrium aluminum garnet (YAG) is presented as a case study. Appropriate selection of precursors and proper tuning of spray parameters resulted in amorphous or crystalline coatings in the as-sprayed condition. YAG phase selection has also been investigated using a discrete, low-density combinatorial synthesis approach.
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Acknowledgments
The authors acknowledge scientific interactions and collaborations with Dr. P. Sujatha Devi (CGCRI, India), Prof. Carlos G. Levi (UC-Santa Barbara), Prof. R. Gambino, Prof. Clare Grey, and Prof. J. Parise (Stony Brook). This research was supported by the MRSEC program of the National Science Foundation under award DMR-0080021.
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Ravi, B., Gandhi, A., Guo, X. et al. Liquid Precursor Plasma Spraying of Functional Materials: A Case Study for Yttrium Aluminum Garnet (YAG). J Therm Spray Tech 17, 82–90 (2008). https://doi.org/10.1007/s11666-007-9151-3
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DOI: https://doi.org/10.1007/s11666-007-9151-3