Scale-up design for industrial development of a PP-MOCVD coating system

Darryl Lee, Susan Krumdieck*, Sam Davies Talwar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The scale-up of research results into industrial processes is a challenge for CVD commercialization. Pulsed-pressure metal-organic (PP-MOCVD) technology does not use a carrier gas. A low-concentration precursor liquid solution is injected into the deposition chamber in discreet, timed pulses. Previous research has indicated that three-dimensional, complex-shaped objects could be coated, and that the process could be scaled-up using simple geometric and time constant relations. This research presents the scale-up design process for a machine to coat a particular product, a stainless steel water pump impeller. Design relations to avoid choked flow and produce uniform coating thickness at high growth rate were estimated and verified experimentally. The pump was inductively heated to 450°C and coated with TiO2 from alkoxide precursor. The coating had good coverage and was estimated to be 5-6μm thick.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
JournalSurface and Coatings Technology
Publication statusPublished - 15 Sep 2013


  • Ceramic coatings
  • Industrial coatings
  • Scale-up
  • System design

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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