کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1656181 1398876 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-temperature stability and interfacial reactions of Ti and TiN thin films on Al2O3 and ZrO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
High-temperature stability and interfacial reactions of Ti and TiN thin films on Al2O3 and ZrO2
چکیده انگلیسی


• Ti films undergo a transition to TiO due to uptake of O from both Al2O3 and ZrO2.
• No interfacial reaction product was observed between ZrO2 and the TiO phase.
• Reaction layer of Ti3Al0.9O1.1 formed between TiO and Al2O3 after 1200 °C.
• Ti coating remained adherent on Al2O3 but delaminated after 1500 °C from ZrO2.
• TiN remained adherent on ZrO2 but delaminated partially from Al2O3 after annealing.

Metallic thin films are used in many applications to modify ceramic surfaces. However, during subsequent processing, chemical interactions may change the properties of the coating. In addition, differences in thermal expansion can lead to delamination of the coating. In this study, titanium and titanium nitride thin films were deposited via physical and chemical vapor deposition (PVD and CVD, respectively) on alumina- and yttria-stabilised zirconia substrates, before being heat-treated at 1200 °C or 1500 °C in static argon atmosphere and analysed via SEM, EDS and XRD to investigate the effect of temperature on the thin films. It was shown that the chemical interactions between TiN and both Al2O3 and ZrO2 are weak. However, partial delamination of the TiN coating on alumina was observed after both annealing temperatures. The TiN coating on zirconia remained adherent. In contrast, the Ti coatings underwent a transformation to cubic TiO on both oxide substrates. This was due to partial reduction of the ZrO2 to ZrO2 − x and dissolution of the Al2O3, which leads to a Ti3Al0.9O1.1 interlayer. The TiO coating which formed remained adherent on the alumina at both annealing temperatures, but delaminated from the ZrO2 substrate after annealing at 1500 °C.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 307, Part A, 15 December 2016, Pages 47–55
نویسندگان
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