کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
617226 1454984 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High temperature tribological study of cobalt-based coatings reinforced with different percentages of alumina
ترجمه فارسی عنوان
مطالعات ترموولوژیک با درجه حرارت بالا از پوشش کبالت تقویت شده با درصد مختلف آلومینا
کلمات کلیدی
تست بپوشید درجه حرارت بالا، لغزش لغزش، فرتینگ
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• Coatings reinforced with alumina were tested at high temperature (1000 °C).
• Increasing alumina percentage in coating is not beneficial for wear resistance.
• Asperities heights affect contact stiffness to a great extend.
• Friction coefficient is not a monotonic function of temperature.

Contact surfaces, subjected to high pressure coupled with low-amplitude oscillation, are used to a great extent in aerospace engine components to reduce vibrations. Relative displacement of contact surfaces coupled with friction force dissipates energy and damps the vibrations. Fretting wear is harmful on interference-fit contacts because the loss of material reduces the normal load and hence, reduces their effectiveness in damping vibrations.Coating is an important means to control friction and wear of contact surfaces. To address this issue an experimental layout was designed, and fretting wear tests were performed at high temperature (1000 °C). A representative sphere-flat contact was investigated in laboratory environment. Two types of metal-ceramic coatings, made of the same metal but with a different alumina percentage, were tested. Results were reported in terms of volume loss against number of wear cycles. It was found that increasing the alumina percentage was detrimental because the volume loss increased dramatically with high number of wear cycles. It was shown that wear results were strongly related to material properties, such as modulus of elasticity, while no correlation was found with contact parameters, friction coefficient and contact stiffness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volume 318, Issues 1–2, 15 October 2014, Pages 89–97
نویسندگان
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