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Coatings 2017, 7(2), 27; doi:10.3390/coatings7020027

Coating Qualities Deposited Using Three Different Thermal Spray Technologies in Relation with Temperatures and Velocities of Spray Droplets

1
Plazwire Co., Ltd., 2-3-54 Higashi-naka, Hakata-ku, Fukuoka 812-0829, Japan
2
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Yasutaka Ando
Received: 21 December 2016 / Revised: 23 January 2017 / Accepted: 10 February 2017 / Published: 16 February 2017
(This article belongs to the Special Issue Thermal Spray Technology)
View Full-Text   |   Download PDF [1529 KB, uploaded 16 February 2017]   |  

Abstract

Three guns based on different thermal spray technologies—namely, gas flame spray, wire arc spray, and wire plasma spray—were operated at each best cost–performance condition, and the resulting spray droplets and deposited coating qualities were investigated. For the former, a simple optical monitoring system was used to measure temperatures and velocities of spray droplets ejected from the guns. On the other hand, for the latter, qualities of coating layers on substrates—namely, surface roughness, atomic composition, hardness, adhesive strength, and porosity—were characterized. Then, these coating qualities were discussed with respect to the measured temperatures and velocities of spray droplets, which revealed novel features in the coatings that have not been seen before, such as atomic composition and hardness strongly dependent on temperature and environments of droplets towards the substrates, and porosity on velocity of droplets impinging onto the substrates. View Full-Text
Keywords: spray droplet from wire; temperature; velocity; gas flame spray; wire arc spray; wire plasma spray; coating quality spray droplet from wire; temperature; velocity; gas flame spray; wire arc spray; wire plasma spray; coating quality
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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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Kawaguchi, Y.; Miyazaki, F.; Yamasaki, M.; Yamagata, Y.; Kobayashi, N.; Muraoka, K. Coating Qualities Deposited Using Three Different Thermal Spray Technologies in Relation with Temperatures and Velocities of Spray Droplets. Coatings 2017, 7, 27.

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