کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1673607 | 1518085 | 2007 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
FIB and TEM studies of damage mechanisms in DLC coatings sliding against aluminum
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Material transfer and adhesion phenomena during sliding contact of non-hydrogenated diamond like carbon (DLC) coatings against an aluminum-silicon (319 Al) counterface tested in vacuum were studied using TEM investigations of the cross-sectional microstructures of the wear tracks. Site-specific focused ion beam (FIB) lift-out method was used to prepare the sections at the precise locations where aluminum pieces were adhered to the DLC surface. The dense amorphous structure of DLC coatings with nanocrystalline graphite platelets is confirmed by the high-resolution transmission electron microscopy. The focused ion channeling contrast images obtained from the cross-sections of the wear track indicated that in some sections of DLC coatings considerable wear was inflicted by aluminum, reducing the coating thickness. The aluminum that was transferred on the DLC coatings' contact surfaces consisted of nanocrystalline grains of less than 100Â nm. TEM examination of the contact surface of the 319 Al pin has revealed that the initial aluminum grain size was also reduced to the nanocrystalline scale and this was accompanied with a hardness increase. These observations revealed that local severe plastic deformation accompanied the aluminum adhesion process to DLC coating surfaces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 516, Issues 2â4, 3 December 2007, Pages 325-335
Journal: Thin Solid Films - Volume 516, Issues 2â4, 3 December 2007, Pages 325-335
نویسندگان
X. Meng-Burany, A.T. Alpas,