کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1583297 1514885 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural changes in bulk metallic glass after annealing below the glass-transition temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Structural changes in bulk metallic glass after annealing below the glass-transition temperature
چکیده انگلیسی

Small structural changes in bulk metallic glasses (BMGs) following thermal treatment below the glass-transition temperature were observed. Zr-based BMG ingots with nominal compositions of Zr52.5Cu17.9Ni14.6Al10.0Ti5.0 (at.%) were isothermally annealed at 630 K for 10–60 min in vacuum and then cooled down. Structural relaxation was indicated by enthalpy evolution during differential scanning calorimetry and by changes in micro-hardness. Atomic structure was studied using time-of-flight neutron diffraction followed by a pair-distribution function (PDF) analysis. Observed changes in the PDF could not be explained by a “free volume” annealing, but were consistent with the elimination of short and long inter-atomic distances.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 471, Issues 1–2, 15 December 2007, Pages 125–129
نویسندگان
, , , , ,