Institute of Materials and Joining Technology, Otto-von-Guericke University Magdeburg, Magdeburg, 39104, Germany
Adv. Mater. Lett., 2018, 9 (1), pp 66-70
Publication Date (Web): May 15, 2018
Copyright © IAAM-VBRI Press
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.
Polymer derived ceramics, preceramic polymers, polysilazane, titanium alloys, oxidation barrier coatings.