Modelling the spreading behaviour of plasma-sprayed nickel droplets under different impact conditions

Show simple item record Zhang, Y en Matthews, Steven en Hyland, Margaret en 2017-09-08T02:48:49Z en 2017-07-12 en
dc.identifier.citation Journal of Physics D: Applied Physics 50(27): 275601 12 Jul 2017 en
dc.identifier.issn 0022-3727 en
dc.identifier.uri en
dc.description.abstract Droplet spreading behaviour is critical in influencing the spreading diameters, material splashing and interfacial bonding conditions with the substrate during plasma spraying. Numerical simulations were performed to understand the effects of droplet impact temperatures, velocities and contact angle on spreading dynamics during the deposition of plasma-sprayed nickel splats. It was found that increasing droplet superheat (droplet temperature of 3000 K) was beneficial for increasing the degree of substrate melting and the droplet spreading diameters due to constrained solidification. However, solidification occurring at the droplet expanding front pinned the liquid–solid contact line and induced finger splashing for the case of 2800 K droplet temperature. The solidified layer disturbed droplet spreading and induced material jetting at the early spreading stage under the circumstance of high droplet impact velocities. A new simplified equation relating the maximum spreading ratios and Reynolds number was proposed. The effect of contact angle influenced droplet spreading under the condition of a large interfacial thermal contact resistance. en
dc.publisher IoP en
dc.relation.ispartofseries Journal of Physics D: Applied Physics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri en
dc.title Modelling the spreading behaviour of plasma-sprayed nickel droplets under different impact conditions en
dc.type Journal Article en
dc.identifier.doi 10.1088/1361-6463/aa760e en
pubs.issue 27 en
pubs.volume 50 en
dc.rights.holder Copyright: IoP en
pubs.publication-status Published en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 635303 en Engineering en Chemical and Materials Eng en
dc.identifier.eissn 1361-6463 en
pubs.number 275601 en
pubs.record-created-at-source-date 2017-09-08 en 2017-06-20 en

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