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首页> 外文期刊>Physica, B. Condensed Matter >Nanocrystallization kinetics of amorphous Fe_(73.5)Cu _1Nb_(3-x)Mo_xSi_(13.5)B_9 (x=1, 2, 3) alloys
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Nanocrystallization kinetics of amorphous Fe_(73.5)Cu _1Nb_(3-x)Mo_xSi_(13.5)B_9 (x=1, 2, 3) alloys

机译：非晶Fe_（73.5）Cu _1Nb_（3-x）Mo_xSi_（13.5）B_9（x = 1，2，3）合金的纳米晶动力学

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摘要

Amorphous ribbons of the alloy Fe_(73.5)Cu_1Nb _(3-x)Mo_xSi_(13.5)B_9 (x=1, 2, 3) were prepared by the standard single copper wheel melt spinning technique in air atmosphere. The isothermal annealing was carried out at 550, 570 and 590 °C for 1 h in a vacuum furnace to study the effect of annealing temperature on the formation of nanocrystallite in as-spun ribbons. The X-ray diffraction (XRD) technique was used to analyse the grain size of the crystalline phase in the annealed samples. It was found that for samples annealed at 590 °C for 1 h, the average grain size increased from 13 nm for the sample with x=1 to 16 nm for the sample with x=3. The primary crystallization kinetics of amorphous ribbons was analyzed by non-isothermal differential scanning calorimetry (DSC) measurements. The crystallization activation energies of amorphous ribbons calculated by using Kissinger model were 347, 297 and 326 kJ/mol for x=1, 2 and 3, respectively. The calculated Avrami exponents n were 1.95, 2.14 and 2.00 for x=1, 2 and 3, respectively. The crystallization mechanism for the non-isothermal primary crystallization of the amorphous ribbons was discussed.
机译：Fe_（73.5）Cu_1Nb_（3-x）Mo_xSi_（13.5）B_9（x = 1，2，3）的非晶态带材是通过标准的单铜轮熔融纺丝技术在大气中制备的。在真空炉中于550、570和590°C下进行等温退火1 h，以研究退火温度对初生带中纳米微晶形成的影响。 X射线衍射（XRD）技术用于分析退火样品中晶相的晶粒尺寸。发现对于在590℃下退火1h的样品，平均晶粒尺寸从x ＝ 1的样品的13nm增加到x ＝ 3的样品的16nm。通过非等温差示扫描量热法（DSC）测量分析了非晶带的主要结晶动力学。对于x ＝ 1、2和3，使用基辛格模型计算的非晶带的结晶活化能分别为347、297和326kJ / mol。对于x = 1、2和3，计算得出的Avrami指数n分别为1.95、2.14和2.00。讨论了非晶带的非等温初结晶的结晶机理。

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