کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5459700 1516187 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On conditions of bulk and surface glass formation of metallic alloys
ترجمه فارسی عنوان
در شرایط تشکیل جامد و شیشه ای آلیاژهای فلزی
کلمات کلیدی
عینک های فلزی، مواد کامپوزیتی، واکنشهای مایع جامد، انجماد سریع خنک کردن، ساختار کریستالی، تجزیه و تحلیل حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
This work is done to analyze the effect of glass forming compounds and melt processing on bulk and surface glass formation. Key factors of glass formation of metallic alloys including structure-phase state of solid precursor (i.e. master-ingot, spun ribbon, powder, etc.) and its melt, conditions of cooling melt and its ability for deep undercooling are considered. A ratio of crystalline glass forming compounds in annealed best BMG compositions is considered to develop a strategy of searching new alloys. Surface glass formation at electro-spark deposition of precursors with high and low GFA used as consumable electrodes is studied. It found that surface glass formation is possible due to both weak and strong chemical interaction of an electrode and a substrate. The former is due to mass transfer of high glass forming ability (GFA) precursor onto metallic substrate with local “drop-by-drop” anode melting stimulated by electric discharge and needs no chemical interaction. The latter goes with diffusion interaction between low GFA precursor and a metallic substrate by a local melting and it is other way to form amorphous surface layer. In both cases the solidification rate of molten drops by electro-spark deposition is enough to suppress crystallization and is compared to melt spinning.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 707, 15 June 2017, Pages 68-72
نویسندگان
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