کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10714347 | 1025586 | 2011 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface morphologic and structural analysis of IR irradiated silver
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The microstructural morphological changes in laser irradiated targets are investigated. Nd:YAG laser (1064 nm, â¼12 ns nominal, 1.1 MW) is used to irradiate 4 N pure (99.99%) fine polished and annealed silver samples in ambient air and under vacuum â¼10â6 Torr. The laser spot size and power density at tight focus are 12 μm and 3Ã1011 W/cm2, respectively. SEM micrographs and X-ray diffractograms of the exposed and unexposed targets reveal the surface texture and structural changes, respectively. Amongst the ablation mechanisms involved, exfoliation and hydrodynamic sputtering are found to be dominant. Surface modifications appear in the form of craters and ripples formation. Heat is conducted non-uniformly through narrow channels at the surface. Thermal stresses induced by the laser do not disturb inter planar distance of the target. On the other hand irradiation causes significant variations in grain size and diffracted X-rays intensities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 406, Issue 9, 15 April 2011, Pages 1713-1716
Journal: Physica B: Condensed Matter - Volume 406, Issue 9, 15 April 2011, Pages 1713-1716
نویسندگان
Anwar Latif, M. Khaleeq-ur-Rahman, M.S. Rafique, K.A. Bhatti,