Engineered TiO₂ and SiO₂-TiO₂ films on silica-coated glass for increased thin film durability under abrasive conditions

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• 作者：Rosa Elena Ramí ; rez-Garcí ; a ; Jesú ; s Alberto Gonzá ; lez-Rodrí ; guez ; Miguel Arroyo-Ortega ; Sergio Alfonso Pé ; rez-Garcí ; a and Liliana Licea-Jimé ; nez
• 刊名：International Journal of Applied Ceramic Technology
• 出版年：2017
• 出版时间：January/February 2017
• 年：2017
• 卷：14
• 期：1
• 页码：39-49
• 全文大小：1851K
• ISSN：1744-7402

文摘

Thin films durability is critical to retain its performance in real life applications. For automotive glass, further factors such as haze appearance developed under abrasive conditions become relevant to ensure the driver's visibility. Macroscopic abrasion resistance tests of TiO₂/SiO₂ and SiO₂–TiO₂/SiO₂ thin films on soda-lime silica (SLS) glass were performed according to an American standard for safety grazing. The purpose of this, was to increase the top active film durability in a bilayer system by understanding how film thickness and top film composition influence abrasion performance. In order to achieve this understanding, three approaches were considered: (a) determination of the influence of TiO₂ top film thickness, (b) replacement of the TiO₂ top film by SiO₂–TiO₂ films, and (c) determination of the influence of SiO₂–TiO₂ film thickness. Results showed that thinner top TiO₂ film thickness leads to SiO₂/TiO₂ bilayers with lower haze value and improved abrasion resistance. It was also found that SiO₂ addition to TiO₂ top film composition promotes the thin film adhesion and sample durability against abrasive wear. Friction coefficient and micro-hardness measurements support the abrasion results. Factors contributing to the improvement of the lifetime performance of TiO₂ and SiO₂–TiO₂ thin films were identified.