کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4985719 1454788 2018 29 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Moisture dependent wear mechanisms of gallium nitride
ترجمه فارسی عنوان
سازگاری پوششی رطوبت از نیترید گالیم
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی
Ultralow wear nature of gallium nitride (GaN) has been revealed recently. The wear rate for GaN has a significant dependence on humidity, ranging from 9 × 10−9 mm3/Nm to 9.5 × 10−7 mm3/Nm; the mechanisms responsible for this variation in wear remain unclear. Here, we performed reciprocal sliding test on GaN under different environments and characterized the chemical compositions of corresponding worn surface by energy dispersive X-ray spectroscopy (EDS). We show that the surface chemistry of GaN responded differently to various testing environments; this gave rise to the wear rate of GaN spanning over orders of magnitude. Additionally, the EDS conducted on the countersample (alumina probe) clearly evidenced a material transfer from GaN to the ruby countersample. Atomic force microscopy (AFM) and secondary electron microscopy (SEM) inside the wear scar indicated a grooving abrasion wear mechanism of GaN tested under humid environment and adhesive wear mechanism for dry nitrogen testing environment; this is confirmed by SEM/EDS of the ruby probes. In addition, transmission electron microscopy (TEM) was employed to image the defects formed underneath the worn surface, due to the tribological sliding, and the results suggested a possible evolution of wear debris formation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tribology International - Volume 118, February 2018, Pages 120-127
نویسندگان
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