NDLI: A stochastic model to simulate the formation of a thermal spray coating

Content Provider	Springer Nature Link
Author	Ghafouri Azar, R. Mostaghimi, J. Chandra, S. Charmchi, M.
Copyright Year	2003
Abstract	We present a three-dimensional, stochastic model of thermal spray coating. It is capable of predicting coating porosity, thickness, roughness, and the variation of these properties with spray parameters. The model assigns impact properties to molten droplets landing on the substrate by generating random values of process parameters, assuming that these properties follow normal distributions with user-specified means and standard deviations. We prescribed rules to calculate splat sizes after droplet impact and their interaction with each other. Porosity is assumed to be solely due to the curl-up of the splats as a result of thermal stresses. We use a Cartesian grid to define the computational domain and to track the shape and position of the deposited coating. The surface of the coating and the location of pores within it are specified using a variable known as the “volume fraction,” defined as the fraction of the volume of a computational cell occupied by coating material. Results are given for the variation of coating porosity, thickness and roughness with varying particle speed, size, and spraying gun speed. Predicted trends agree with experimental observation.
Starting Page	53
Ending Page	69
Page Count	17
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	12
Issue Number	1
e-ISSN	15441016
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	coating formation deposition microstructure simulation stochastic Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Materials Science Characterization and Evaluation of Materials Operating Procedures, Materials Treatment Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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