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Composite Coatings of Alumina-based Ceramics and Stainless Steel Manufactured by Plasma Spraying

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    0329614 - ÚFP 2010 RIV LT eng J - Journal Article
    Ctibor, Pavel - Ageorges, H. - Neufuss, Karel - Zahálka, F.
    Composite Coatings of Alumina-based Ceramics and Stainless Steel Manufactured by Plasma Spraying.
    [Kompozitní povlaky z keramiky na bázi oxidu hlinitého a nerez oceli připravené plazmovým stříkáním.]
    Materials Science. Roč. 15, č. 2 (2009), s. 108-114. ISSN 1392-1320. E-ISSN 2029-7289
    R&D Projects: GA AV ČR 1QS200430560
    Institutional research plan: CEZ:AV0Z20430508
    Keywords : Cermet * plasma spraying * microstructure * elastic modulus * wear resistance
    Subject RIV: JH - Ceramics, Fire-Resistant Materials and Glass
    Impact factor: 0.299, year: 2009
    http://internet.ktu.lt/en/science/journals/medz/medz0-97.html#Composite_Coatings_

    Plasma spraying was used to fabricate composite (cermet) coatings from a mixture of powders of alumina-based ceramics and stainless steel. Regarding the water-stabilized plasma spray process (WSP), the two powders were mixed in the feed container, whereas a simultaneous feeding of the powders by separate injectors (co-spraying) was carried out together with the gas-stabilized plasma spray process (GSP). Both processes belong to a family of procedures known as atmospheric plasma spraying (APS), and give rise to similar coating characteristics. The complementarity of the component mixing in the two processes was demonstrated, and the mechanical properties such as microhardness and elastic modulus of the resulting composite coatings were studied. Attention was also paid to microstructural aspects connected to wear resistance.

    Plazmovým stříkáním byly připraveny kompozitní povlaky z keramiky na bázi oxidu hlinitého a z nerez oceli. V plazmatronu typu WSP byly komponenty prášku smíchány v podavači a do plazmatu přiváděny jako směs, kdežto v plazmatronu typu GSP byly podávány separátně a směšovány až v plazmatu. Byly sledovány mechanické vlastnosti jako mikrotvrdost, modul pružnosti a otěruvzdornost. WSP proces vedl k tvorbě nástřiků s vrstevnatou strukturou střídající pásy kovu a keramiky. GSP proces poskytl homogenní vrstvy bez trhlin a propojené pórovitosti s příznivým vlivem těchto strukturních faktorů na mechanické vlastnosti.
    Permanent Link: http://hdl.handle.net/11104/0175603

     
     
Number of the records: 1  

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