Laser pyrolysis of an organosilazane-based glass/ZrO2 composite coating system

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Tangermann-Gerk K, Barroso GS, Weisenseel B, Greil P, Fey T, Motz G
Zeitschrift: Materials & Design
Verlag: Elsevier
Jahr der Veröffentlichung: 2016
Band: 109
Heftnummer: 5
Seitenbereich: 644-651
ISSN: 0261-3069
Sprache: Englisch


Abstract


A process for the laser pyrolysis of a ceramic composite coating system composed of an organosilazane (Durazane™ 1800) with ZrO2 and glass particles as fillers was developed. Firstly, the mild steel substrates were dip-coated with a perhydropolysilazane (PHPS) bond coat, onto which the composite coating slurry was applied by spraying. After drying, pyrolysis using a Nd:YAG laser led to the formation of a dense semi-crystalline ceramic coating system with a thickness up to 20 μm in a short time. The resulting coatings possess a significantly different morphology compared to the same coating system pyrolyzed in a furnace, due to different forming mechanisms. Laser irradiation led to the unexpected formation of oxygen vacancies in the crystalline lattice of ZrO2, which increased the absorption of the laser radiation, enabling the transformation into a ceramic coating. Simultaneously, reactions between the glasses and the monoclinic ZrO2 fillers were activated, resulting in the formation of dendritic tetragonal-stabilized ZrO2 crystals. The thermal stability of the coating components was analyzed by thermogravimetric analysis (TGA) and the coatings were investigated by attenuated total reflectance infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).




 



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Fey, Tobias Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Greil, Peter Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Weisenseel, Bastian
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)


Einrichtungen weiterer Autorinnen und Autoren

Bayerisches Laserzentrum gemeinnützige Forschungsgesellschaft mbH (BLZ)


Zitierweisen

APA:
Tangermann-Gerk, K., Barroso, G.S., Weisenseel, B., Greil, P., Fey, T., & Motz, G. (2016). Laser pyrolysis of an organosilazane-based glass/ZrO2 composite coating system. Materials & Design, 109(5), 644-651. https://dx.doi.org/10.1016/j.matdes.2016.07.102

MLA:
Tangermann-Gerk, Katja, et al. "Laser pyrolysis of an organosilazane-based glass/ZrO2 composite coating system." Materials & Design 109.5 (2016): 644-651.

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Zuletzt aktualisiert 2018-14-11 um 20:50

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