Build-up mechanism of suspension plasma-sprayed alumina coatings deposited by WSP-H plasma torch.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00484134" target="_blank" >RIV/61389021:_____/17:00484134 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Build-up mechanism of suspension plasma-sprayed alumina coatings deposited by WSP-H plasma torch.

Popis výsledku v původním jazyce

Suspension plasma spraying is a modification of the conventional plasma spraying, where dry coarse powder is replaced by suspension of fine powder. SPS method benefits from using of high enthalpy plasma torches, since additional heat is necessary to evaporate the liquid carrier. This paper elucidates the growth mechanisms of the suspension plasma sprayed coatings prepared by high enthalpy WSP-H plasma torch. Two alumina suspensions with different formulation were sprayed to demonstrate different build-up mechanisms of the coatings with typical “cauliflower-like” and dense microstructures. Splat formation, particle trajectory divergence, and spray beads were investigated and it was demonstrated that the mutual sample-torch position also strongly influences the character of the coating. Moreover, it was observed that cauliflower-like columnar structure may be, developed also on smooth surfaces and the typical column diameter is directly connected to the thickness of the coating.

Název v anglickém jazyce

Build-up mechanism of suspension plasma-sprayed alumina coatings deposited by WSP-H plasma torch.

Popis výsledku anglicky

Suspension plasma spraying is a modification of the conventional plasma spraying, where dry coarse powder is replaced by suspension of fine powder. SPS method benefits from using of high enthalpy plasma torches, since additional heat is necessary to evaporate the liquid carrier. This paper elucidates the growth mechanisms of the suspension plasma sprayed coatings prepared by high enthalpy WSP-H plasma torch. Two alumina suspensions with different formulation were sprayed to demonstrate different build-up mechanisms of the coatings with typical “cauliflower-like” and dense microstructures. Splat formation, particle trajectory divergence, and spray beads were investigated and it was demonstrated that the mutual sample-torch position also strongly influences the character of the coating. Moreover, it was observed that cauliflower-like columnar structure may be, developed also on smooth surfaces and the typical column diameter is directly connected to the thickness of the coating.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA15-12145S" target="_blank" >GA15-12145S: Fyzikální aspekty depozice plazmových nástřiků z kapalné fáze</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů