Particle-filled polymer derived ceramic coatings on titanium alloy Ti-6Al-4V

Iryna Smokovych*, Michael Scheffler

Institute of Materials and Joining Technology, Otto-von-Guericke University Magdeburg, Magdeburg, 39104, Germany

Adv. Mater. Lett., 2018, 9 (1), pp 66-70

DOI: 10.5185/amlett.2018.1919

Publication Date (Web): May 15, 2018

E-mail: ira.smokovich@gmail.com

Abstract


Thermodynamic analysis was carried out to predict the phase composition of polysilazane-type polymer derived ceramic coatings on a Ti-6Al-4V titanium alloy by calculating the most probable chemical reactions between the constituents and expected crystalline phases. The feasibility of polysilazane derived coatings on Ti-6Al-4V was proved experimentally. The coatings based on amorphous SiON and SiO2 and a free Si, which oxidized to SiO2 during high-temperature exposure, enhance the oxidation resistance of Ti-6Al-4V alloy at 800 °C in air up to eight times compared to an uncoated alloy.

Keywords

Polymer derived ceramics, preceramic polymers, polysilazane, titanium alloys, oxidation barrier coatings.

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