Experimental study of high velocity oxy-fuel sprayed WC-17Co coatings applied on complex geometries. Part B: Influence of kinematic spray parameters on microstructure, phase composition and decarburization of the coatings

Katranidis, Vasileios, Gu, Sai, Ramirez Reina, Tomas, Alpay, Esat, Allcock, B and Kamnis, S (2017) Experimental study of high velocity oxy-fuel sprayed WC-17Co coatings applied on complex geometries. Part B: Influence of kinematic spray parameters on microstructure, phase composition and decarburization of the coatings Surface and Coatings Technology, 328. pp. 499-512.

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Abstract

The aim of this study is to evaluate comprehensively the effect of spray angle, spray distance and gun traverse speed on the microstructure and phase composition of HVOF sprayed WC-17 coatings. An experimental setup that enables the isolation of each one of the kinematic parameters and the systemic study of their interplay is employed. A mechanism of particle partition and WC-cluster rebounding at short distances and oblique spray angles is proposed. It is revealed that small angle inclinations benefit notably the WC distribution in the coatings sprayed at long stand-off distances. Gun traverse speed, affects the oxygen content in the coating via cumulative superficial oxide scales formed on the as-sprayed coating surface during deposition. Metallic W continuous rims are seen to engulf small splats, suggesting crystallization that occurred in-flight.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :	Name Email ORCID Katranidis, Vasileios v.katranidis@surrey.ac.uk Gu, Sai sai.gu@surrey.ac.uk Ramirez Reina, Tomas t.ramirezreina@surrey.ac.uk Alpay, Esat e.alpay@surrey.ac.uk Allcock, B Kamnis, S
Date :	12 September 2017
Funders :	EPSRC
Identification Number :	10.1016/j.surfcoat.2017.09.027
Copyright Disclaimer :	© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Uncontrolled Keywords :	HVOF WC-Co Decarburization Microstructure Spray angle Spray distance
Depositing User :	Melanie Hughes
Date Deposited :	27 Sep 2017 11:52
Last Modified :	09 May 2018 08:09
URI:	http://epubs.surrey.ac.uk/id/eprint/842412

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