کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1623992 1516414 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of centimeter Fe-based bulk metallic glasses in low vacuum environment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Formation of centimeter Fe-based bulk metallic glasses in low vacuum environment
چکیده انگلیسی

The formation of a Fe43.7Co7.3Cr14.7Mo12.6C15.5B4.3Y1.9 bulk metallic glass (BMG) was attempted in low vacuum environment and in air using commercial raw materials. The glass forming ability of the Fe-based alloys was studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and differential thermal analyzer (DTA). It was found that cylindric rods with diameters ranging from 10 mm to 5 mm could be successfully fabricated by copper-mold casting in the pressures from 1.5 Pa to 105 Pa (105 Pa = 1 atm). All BMGs exhibit a distinct glass transition and wide supercooled liquid region. The preparation condition seems not significantly affected by the thermodynamic parameters of BMG, such as supercooled liquid region, glass transition temperature and melting process. The oxygen content of the alloys prepared in different vacuum conditions was measured by a LECO oxygen analyzer, which revealed that the oxygen content was less than 100 ppm for all BMGs prepared, even in air. The good glass forming ability and excellent oxidation resistance for the present Fe-based alloy are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 463, Issues 1–2, 8 September 2008, Pages 246–249
نویسندگان
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