کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
617487 | 1454995 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An in-situ heating effect study on tribological behavior of SU-8+PFPE composite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
SU-8 polymer is an emerging structural material for micro-fabrication of MEMS/NEMS devices using photo-lithography process. However, poor tribological properties of SU-8 restrict its wide applications as a very reliable MEMS material. In our earlier work [1], we have developed SU-8 composites which reduced friction and enhanced wear life of SU-8 by more than four orders of magnitude. The improvements in the properties were attributed to the self-lubricating nature of the composite by continuous supply of the lubricant into the worn areas, the lubricious nature of the filler lubricant perfluoropolyether (PFPE), and possible chemical bonding between SU-8 and PFPE. In this current work, we further investigated the effect of in-situ heating on the tribological performances of the SU-8+PFPE composite. In-situ heating from room temperature (25 °C) to 100 °C showed a strong effect on the tribological behavior of SU-8+PFPE composite by reducing its initial and steady-state friction coefficients by ~2 and ~7 times, respectively. Wear life (n) increased by more than three times due to in-situ heating. Greater surface area coverage by the spreading of PFPE lubricant and migration of PFPE from the bulk to surface are found responsible for this superior tribological performance of the composite at high temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volume 307, Issues 1â2, 30 September 2013, Pages 182-189
Journal: Wear - Volume 307, Issues 1â2, 30 September 2013, Pages 182-189
نویسندگان
Prabakaran Saravanan, Nalam Satyanarayana, Duong Hai Minh, Sujeet K. Sinha,