کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1572113 | 1000669 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanoindentation 'pop-in' phenomenon in epitaxial ZnO thin films on sapphire substrates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nanoindentation studies were carried out on epitaxial ZnO thin films on (0001) sapphire substrates grown by rf magnetron sputtering technique. A single sudden discontinuity ('pop-in') in the load-displacement curve was observed at a specific depth (13-16Â nm) of the film. The physical mechanism responsible for the 'pop-in' event in these epitaxial films may be due to the interaction behavior of the threading dislocations during the mechanical deformation. Indentation well below the critical depth was found to be plastic deformation behavior (residual impression 4Â nm). The detailed deformation behavior of ZnO thin films and the critical parameters associated with 'pop-in' phenomenon were also determined during indentation in correlation with the bulk ZnO single crystal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 59, Issue 4, April 2008, Pages 359-364
Journal: Materials Characterization - Volume 59, Issue 4, April 2008, Pages 359-364
نویسندگان
R. Navamathavan, Seong-Ju Park, Jun-Hee Hahn, Chi Kyu Choi,