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Coatings 2015, 5(4), 688-708; doi:10.3390/coatings5040688

Development of 3D Multicomponent Model for Cold Spray Process Using Nitrogen and Air

1
Faculty of Science Engineering and Technology, Swinburne University of Technology, Hawthorn Vic 3122, Australia
2
CSIRO Manufacturing Flagship, Gate 5 Normanby Road, Clayton, Victoria 3168, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Lavacchi
Received: 14 August 2015 / Revised: 25 September 2015 / Accepted: 12 October 2015 / Published: 16 October 2015
(This article belongs to the Special Issue Trends in Coatings and Surface Technology—Feature Papers)
View Full-Text   |   Download PDF [2587 KB, uploaded 16 October 2015]   |  

Abstract

Cold spray is a unique coating technology that allows for solid state deposition of particles under atmospheric pressure. In this paper, a three dimensional, Computational Fluid Dynamics (CFD) multicomponent model is developed to estimate cold spray gas conditions involving both nitrogen and air. Calibration of the model followed by validation is accomplished by considering the thermal history of substrate exposed to cold spray supersonic jet. The developed holistic multicomponent model is effective in determining the state of gas and particles from injection point to the substrate surface with the advantage of optimizing very rapid cold spray deposition in nanoseconds. The validation of k-ε type CFD multicomponent model is done by using the temperature measured for a titanium substrate exposed to cold spray nitrogen at 800 °C and 3 MPa. Heat transfer and radiation are considered for the de Laval nozzle used in cold spray experiments. The calibrated multicomponent model has successfully estimated the state of propellant gas for the chosen high pressure and high temperature cold spray conditions. Moreover, the multicomponent model predictions are in good agreement with a previous holistic three dimensional cold spray model in which only nitrogen was used as the surrounding as well as the propellant gas. View Full-Text
Keywords: cold gas dynamic spraying; supersonic jet; computational fluid dynamics (CFD); coating technique; three dimensional multicomponent numerical model cold gas dynamic spraying; supersonic jet; computational fluid dynamics (CFD); coating technique; three dimensional multicomponent numerical model
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Rab, M.F.U.; Zahiri, S.; Masood, S.H.; Jahedi, M.; Nagarajah, R. Development of 3D Multicomponent Model for Cold Spray Process Using Nitrogen and Air. Coatings 2015, 5, 688-708.

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