Combustion-aided suspension plasma spraying of Y{sub 2}O{sub 3} nanoparticles: Synthesis and modeling
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798 (Singapore)
- Institute of High Performance Computing, 1 Science Park Road, No. 01-01, The Capricorn, Singapore Science Park II, Singapore 117528 (Singapore)
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798 (Singapore)
Combustion-aided suspension plasma spraying (SPS) was developed for the synthesis of Y{sub 2}O{sub 3} nanoparticles. Numerical models for Ar, Ar/O{sub 2}, and combustion-aided plasma fields were built using FLUENT V6.3.2(c) to compare their different plasma thermophysical properties. Modeling and experimental results both indicate that the plasma field was substantially altered by combustion-aided SPS. The plasma exhibited an elevated volume average temperature and reduced velocity as well as a broadened plasma plume, which resulted in an enhanced vapor supersaturation degree and a faster quenching rate in the radial direction. These can be attributed to the dual effects of oxygen dissociation/recombination and acetone solvent combustion. Consequently, productivity of the obtained nanoparticles increased remarkably and the particles' morphology was improved, with a smaller mean particle size and a narrower size distribution in comparison with those of powder feeding spraying. Furthermore, plasma-induced cubic{yields}monoclinic phase transformation in the as-sprayed Y{sub 2}O{sub 3} particles was restrained by combustion-aided SPS to some extent.
- OSTI ID:
- 21064542
- Journal Information:
- Journal of Applied Physics, Vol. 103, Issue 3; Other Information: DOI: 10.1063/1.2841524; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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