کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9778067 | 1510569 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Glass formation and sluggish nucleation: Growth in ternary eutectic Co-Hf-B system
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Four rapidly quenched (RQ) ribbons of Co-Hf-B alloys with the ternary eutectic compositions were obtained by melt-spinning. The thermal stability and glass forming ability (GFA) were studied using high-temperature differential scanning calorimetry (DSC) measurements. Very high GFA was found for all the alloys studied, which are characterized by high values (above 0.64) of the reduced crystallization temperature (Trx = Tx/Tm). The supercooled liquid region (ÎTx = Tx â Tg = 45 K) was found for Co66Hf6.5B27.5 amorphous alloy with equilibrium microstructure composed of three intermetallic compounds (Co2B, Co21Hf2B6 and Co3HfB2). The high GFA was explained by the sluggish nucleation and slow growth of the complex structure intermetallic compounds in the ternary Co-Hf-B system. The Hf presence in the alloys studied plays an important role due to the slow diffusivity of relatively large atoms of this element.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 19â20, 1 July 2005, Pages 1696-1700
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 19â20, 1 July 2005, Pages 1696-1700
نویسندگان
W.S. Sun, H.F. Zhang, Z.Q. Hu, T. Kulik,