Combustion-aided suspension plasma spraying of Y2O3 nanoparticles : Synthesis and modeling

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

14 Scopus Citations
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Author(s)

  • X. L. Sun
  • A. I. Y. Tok
  • S. L. Lim
  • C. W. Kang
  • H. W. Ng

Detail(s)

Original languageEnglish
Article number034308
Journal / PublicationJournal of Applied Physics
Volume103
Issue number3
Publication statusPublished - 1 Feb 2008
Externally publishedYes

Abstract

Combustion-aided suspension plasma spraying (SPS) was developed for the synthesis of Y2O3 nanoparticles. Numerical models for Ar, Ar/O2, and combustion-aided plasma fields were built using FLUENT V6.3.2© 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→monoclinic phase transformation in the as-sprayed Y2O3 particles was restrained by combustion-aided SPS to some extent. © 2008 American Institute of Physics.

Citation Format(s)

Combustion-aided suspension plasma spraying of Y2O3 nanoparticles: Synthesis and modeling. / Sun, X. L.; Tok, A. I. Y.; Lim, S. L. et al.
In: Journal of Applied Physics, Vol. 103, No. 3, 034308, 01.02.2008.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review