Splat morphology of yttria-stabilized zirconia droplet deposited via hybrid plasma spraying

Kentaro Shinoda, Hideyuki Murakami

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The splat morphology of yttria-stabilized zirconia (YSZ) droplets deposited by dc-rf hybrid plasma spraying (HYPS) was studied. Two types of YSZ powder were used, namely fused and crushed powder (FC) and hollow spherical powder (HOSP). The three-dimensional shape of more than 600 disk-shaped splats on preheated substrates was evaluated using a laser-scanning microscope to determine the splat diameter, thickness, and their dimensionless forms. The HOSP showed a higher degree of flattening than the FC. Both the FC with a powder size distribution of 45-75 μm and the HOSP of 30-120 μm can be used as spray materials in the HYPS to achieve a coating design based on fully molten particles. The effect of the substrate temperature on the splat morphology was similar to that of atmospheric dc plasma spraying; however, the transition from a splashed shape to a disk shape gradually occurred at higher substrate temperatures.

Original languageEnglish
Pages (from-to)602-610
Number of pages9
JournalJournal of Thermal Spray Technology
Volume19
Issue number3
DOIs
Publication statusPublished - 2010 Mar 1

Keywords

  • Diagnostics and control
  • Preheating of substrate
  • RF induction plasma spraying
  • TBC topcoats

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry

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