کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450916 988750 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Early crystallization stages in a Zr–Cu–Ni–Al–Ti metallic glass
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Early crystallization stages in a Zr–Cu–Ni–Al–Ti metallic glass
چکیده انگلیسی

The early crystallization stages of Zr52.5Cu17.9Ni14.6Al10Ti5 metallic glass with different impurity oxygen levels were investigated with differential scanning calorimetry (DSC), high resolution electron microscopy (HREM), three-dimensional atom probe (3DAP) and small angle X-ray scattering (SAXS). While the low oxygen sample showed two peaks, the high oxygen sample showed one peak in isothermal DSC slightly above the glass transition temperatures. No evidence for the previously reported phase separation was detected in the supercooled liquid by 3DAP; compositional contrasts in SAXS and 3DAP were detected only when nanocrystals were confirmed by HREM. The low oxygen sample forms fine Ti-enriched nanocrystals and then crystallizes into Ti-poor NiZr2-phase, the high oxygen sample crystallizes into very fine NiTi2-type big cube phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 53, Issue 7, April 2005, Pages 2091–2099
نویسندگان
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