کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1530888 | 1512004 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat capacity of glassy and crystalline Zr0.55Al0.10Ni0.05Cu0.30
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The heat capacity (Cp) of Zr0.55Al0.10Ni0.05Cu0.30 (ZANC) alloy was measured for glassy rod, glassy ribbon, and the crystallized samples by a thermal relaxation technique between 1.8 and 310Â K and by the step scanning method of differential scanning calorimetry (DSC) between 300 and 873Â K. The low-temperature Cp becomes larger as the sample turns from the crystal into the glassy rod and further into the glassy ribbon. The crystallized sample showed no anomaly in Cp up to 873Â K, while the glassy rod and glassy ribbon samples showed a glass transition around 680Â K, and then crystallization at about 726Â K. An exothermic phenomenon was observed in the glassy ribbon sample below the glass transition temperature, which was probably caused by another structural relaxation. These results suggest that the degree of vitrification becomes higher with increasing cooling rate in the vitrification process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 148, Issues 1â3, 25 February 2008, Pages 207-210
Journal: Materials Science and Engineering: B - Volume 148, Issues 1â3, 25 February 2008, Pages 207-210
نویسندگان
Yosuke Moriya, Takahiro Yoshida, Hitoshi Kawaji, Tooru Atake, Mikio Fukuhara, Hisamichi Kimura, Akihisa Inoue,