Numerical study to examine the effect of porosity on in-flight particle dynamics

Kamnis, S, Gu, S and Vardavoulias, M (2011) Numerical study to examine the effect of porosity on in-flight particle dynamics Journal of Thermal Spray Technology, 20 (3). pp. 630-637.

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Abstract

High velocity oxygen fuel (HVOF) thermal spray has been widely used to deposit hard composite materials such as WC-Co powders for wear-resistant applications. Powder morphology varies according to production methods while new powder manufacturing techniques produce porous powders containing air voids which are not interconnected. The porous microstructure within the powder will influence in-flight thermal and aerodynamic behavior of particles which is expected to be different from fully solid powder. This article is devoted to study the heat and momentum transfer in a HVOF sprayed WC-Co particles with different sizes and porosity levels. The results highlight the importance of thermal gradients inside the particles as a result of microporosity and how HVOF operating parameters need to be modified considering such temperature gradient.

Item Type:	Article
Authors :	Authors Email ORCID Kamnis, S UNSPECIFIED UNSPECIFIED Gu, S UNSPECIFIED UNSPECIFIED Vardavoulias, M UNSPECIFIED UNSPECIFIED
Date :	1 January 2011
Funders :	EU FP7
Identification Number :	https://doi.org/10.1007/s11666-010-9606-9
Uncontrolled Keywords :	CFD, HVOF, in-flight, porous powder, WC-Co
Depositing User :	Symplectic Elements
Date Deposited :	28 Mar 2017 10:59
Last Modified :	28 Mar 2017 10:59
URI:	http://epubs.surrey.ac.uk/id/eprint/810581

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