کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1677761 1518365 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of directional walk on atom probe microanalysis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Impact of directional walk on atom probe microanalysis
چکیده انگلیسی

In the atom probe microanalysis of steels, inconsistencies in the measured compositions of solutes (C, N) have often been reported, as well as their appearance as molecular ions. Here we propose that these issues might arise from surface migration of solute atoms over the specimen surface. Surface migration of solutes is evidenced by field-ion microscopy observations, and its consequences on atom probe microanalysis are detailed for a wide range of solute (P, Si, Mn, B, C and N). It is proposed that directional walk driven by field gradients over the specimen surface and thermally activated is the prominent effect.


► Directional walk affects a wide range of solute species in the atom probe microanalysis of steel.
► It primarily affects interstitial elements, but has also been observed for substitutional (Si).
► The influence of experimental parameters such as base temperature and pulsing mode are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 113, February 2012, Pages 182–191
نویسندگان
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