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Journal of Thermal Spray Technology

, Volume 26, Issue 1–2, pp 12–36 | Cite as

Numerical Study of Suspension Plasma Spraying

  • Amirsaman FarrokhpanahEmail author
  • Thomas W. Coyle
  • Javad Mostaghimi
Peer Reviewed

Abstract

A numerical study of suspension plasma spraying is presented in the current work. The liquid suspension jet is replaced with a train of droplets containing the suspension particles injected into the plasma flow. Atomization, evaporation, and melting of different components are considered for droplets and particles as they travel toward the substrate. Effect of different parameters on particle conditions during flight and upon impact on the substrate is investigated. Initially, influence of the torch operating conditions such as inlet flow rate and power is studied. Additionally, effect of injector parameters like injection location, flow rate, and angle is examined. The model used in the current study takes high-temperature gradients and non-continuum effects into account. Moreover, the important effect of change in physical properties of suspension droplets as a result of evaporation is included in the model. These mainly include variations in heat transfer properties and viscosity. Utilizing this improved model, several test cases have been considered to better evaluate the effect of different parameters on the quality of particles during flight and upon impact on the substrate.

Keywords

droplet breakup particle trajectory suspension plasma spraying suspension viscosity 

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Copyright information

© ASM International 2016

Authors and Affiliations

  • Amirsaman Farrokhpanah
    • 1
    Email author
  • Thomas W. Coyle
    • 2
  • Javad Mostaghimi
    • 1
  1. 1.Mechanical and Industrial Engineering DepartmentUniversity of TorontoTorontoCanada
  2. 2.Materials Science and EngineeringUniversity of TorontoTorontoCanada

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