کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
614362 1454808 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rolling contact fatigue of bearing components coated with carbon nitride thin films
ترجمه فارسی عنوان
خستگی تماس نورد اجزای بلبرینگ پوشش داده شده با فیلم های نازک کربن نازک
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• The presence of CNx coating on roller prevents run-in effects during rolling.
• Coating debris prevent metal contact and facilitate shearing between counterparts.New run-in effects due to steel-to-steel contact during rolling are prevented.
• Probability for premature fatigue and excessive wear are significantly reduced.
• Effective thickness of W interlayer, for avoiding roller fatigue, is ~15 nm.

Bearing rollers were coated with CNx films using high power impulse magnetron sputtering deposition in order to reduce their rolling-contact fatigue as investigated using a Micro-Pitting Rig tribometer under poly-alpha-olefin lubricated conditions. Coated rollers with a ~15 nm thick W adhesion layer to the substrate, exhibit the best performance, presenting mild wear and no fatigue after 700 kcycles. The steady-state friction coefficient was ~0.05 for both uncoated and coated rollers. Uncoated rollers show run-in friction in the first 50 kcycles, because of steel-to-steel contact, which is absent for coated rollers. Analytical transmission electron microscopy and X-ray photoelectron spectroscopy show that the presence of a CNx coating prevents steel-to-steel contact of the counterparts, prior to the elastohydrodynamic lubrication, reducing their wear and increasing the lifetime expectancy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tribology International - Volume 98, June 2016, Pages 100–107
نویسندگان
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