کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803219 | 1516463 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interaction of hydrogen with a nickel surface in the low-temperature field evaporation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The process of field evaporation of nickel in hydrogen atmosphere under pressure 10â6âPa at 20âK was investigated using a high resolution pulsed-laser time-of-flight atom-probe field ion microscope. Under these conditions, the ions of H+, H2+ and H3+ were detected as well as those of Ni2+, Ni+ and NiHx+ (x=1 -3). On the basis of both: experimentally determined energy distribution of ions and ab initio calculations in the density-functional theory (DFT) for Ni-H, including external homogeneous electrostatic fields, we can state that hydrogen atoms are bound to the nickel surface in the presence of the electrostatic field of strength about 30âV/nm. These complex ions are formed within two topmost layers at the nickel surface in the high electric field applied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volumes 404â406, 8 December 2005, Pages 303-306
Journal: Journal of Alloys and Compounds - Volumes 404â406, 8 December 2005, Pages 303-306
نویسندگان
Z.M. StÈ©pieÅ,