کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5351624 | 1503662 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Laser-induced electrochemical de- and repassivation investigations on plasma-oxidized aluminium alloys
ترجمه فارسی عنوان
تحقیقات الکتروشیمیایی القاء شده توسط لیزر بر روی آلومینیوم اکسید شده پلاسما
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
In situ laser depassivation of plasma electrolytically oxididized (PEO) coatings on aluminium was investigated with nanosecond pulses. Ultraviolet radiation of 266Â nm was chosen in order to achieve a high absorption in the dielectric coating. The additive accumulation of laser-induced material defects (incubation) affected the depassivation processes. Incubation occurred only at the edges of the ablation craters irradiated by the outer region of the Gaussian beam profile, where the local fluence is below the ablation threshold. The ablation rate in the spot center did not exhibit an incubation effect. Repassivation was interpreted by a linear combination of a high-field and a point defect growth model. At low overpotentials, field gradients affect the process driving the oxide growth at the buried interface. At high fields, corrosion reactions dominate at the oxide/solution interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 302, 30 May 2014, Pages 184-188
Journal: Applied Surface Science - Volume 302, 30 May 2014, Pages 184-188
نویسندگان
Tristan O. Nagy, Ulrich Pacher, Ariane Giesriegl, Lukas Soyka, Günter Trettenhahn, Wolfgang Kautek,