کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1451406 988772 2005 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vacancy clustering and relaxation behavior in rapidly solidified B2 FeAl ribbons
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Vacancy clustering and relaxation behavior in rapidly solidified B2 FeAl ribbons
چکیده انگلیسی

The clustering and relaxation behavior of supersaturated thermal vacancies under annealing at 723 K and subsequent secondary defect formation were investigated in rapidly solidified Fe-40.4, 49.9 and 50.0 at.%Al ribbons by X-ray diffractometry, density measurement, differential scanning calorimetry, scanning electron microscopy, atomic force microscopy and transmission electron microscopy. Supersaturated thermal vacancies of ≈0.3–2.5% were frozen into the as-spun ribbon. Most of the supersaturated vacancies were annihilated during a heat treatment, and the amount of annihilated vacancies was larger for a higher Al content. A large number of mesopores as well as dislocations were observed after the heat treatment, and the size of mesopores increased with increasing Al content. The results obtained suggest that mesopore formation is induced by clustering of supersaturated thermal vacancies. The activation enthalpy and kinetics of the vacancy clustering are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 53, Issue 13, August 2005, Pages 3751–3764
نویسندگان
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