Non-isothermal crystallization kinetics of Zr52Cu18Ni14Al10Ti6 metallic glass

Prajapati, Sanjay K.; Kasyap, Supriya; Patel, Ashmi T.; Pratap, Arun

doi:10.1007/s10973-015-4979-0

Cited by 22 publications

(4 citation statements)

References 51 publications

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“…The E a is usually determined with Kissinger method ( Ref 7,8,20,23). It was revealed that the straight line obtained for the E a evaluation refers not only to the high heating rates but also to heating rates from 10 to 140 K/min.…”

Section: Discussionmentioning

confidence: 99%

Modification of the Ti40Cu36Zr10Pd14 BMG Crystallization Mechanism with Heating Rates 10-140 K/min

Czeppe

Sypień

Wierzbicka-Miernik

2016

J. of Materi Eng and Perform

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The article presents investigations of Ti 40 Cu 36 Zr 10 Pd 14 bulk metallic glass crystallization process heated with the rates of 10, 60, 100 and 140 K/min. High heating rates experiments were performed in a new type of differential scanning calorimeter equipped with a fast responding thermal sensor. Phase composition and microstructure were studied with x-ray diffraction and transmission electron microscopy. The observed crystallization proceeded in two separate steps. Applied high rates of heating/cooling resulted in the crystallization of only one CuTi phase, replacing typical multi-phase crystallization. The microstructure after crystallization was polycrystalline with some amount of amorphous phase retained. Kinetic parameters were determined with the use of the Kissinger and Friedman iso-conversional analysis and MatusitaSakka iso-kinetic model. The kinetic analysis supplies results concerning autocatalytically activated mechanism of primary crystallization with decreasing activation energy and small density of quenched-in nuclei, in good agreement with previous structural investigations. The mechanism of secondary crystallization required dense nuclei site, increasing activation energy and large nucleation frequency. The amorphous phase of Ti 40 Cu 36 Zr 10 Pd 14 BMG revealed high thermal stability against crystallization. Application of high heating rates in DSC experiments might be useful for the determination of mechanism and kinetic parameters in investigations of metallic glasses crystallization, giving reasonable results.

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Section: Discussionmentioning

confidence: 99%

Modification of the Ti40Cu36Zr10Pd14 BMG Crystallization Mechanism with Heating Rates 10-140 K/min

Czeppe

Sypień

Wierzbicka-Miernik

2016

J. of Materi Eng and Perform

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“…nucleation rate for the crystalline volume fraction between 0.2 and 0.9. Although studies on the crystallization kinetics have been carried out for a series of metallic glasses [7][8][9][10][11][12][13][14][15], data are still in deficiency on the crystallization kinetics of Fe-based metallic glasses.…”

Section: Glassy Alloysmentioning

confidence: 99%

“…Traditionally, studies of the crystallization kinetics were performed on DSC equipment under non-isothermal crystallization and isothermal crystallization conditions. In previous studies, the effective activation energy, crystallized volume fraction, and transition kinetics have been analysed in detail [7][8][9][10][11][12][13][14][15]. Wang et al [7] investigated the crystallization kinetics in the Fe 80 P 13 C 7 alloys and proposed that the crystalline mechanism belongs to the diffusion-controlled growth of the glassy ribbons.…”

Section: Introductionmentioning

confidence: 99%

“…Lu et al [10] studied the complex primary crystallization kinetics of the amorphous Finemet alloys and pointed out that the crystalline mechanism has one-dimensional growth at a near-zero nucleation rate for the crystalline volume fraction between 0.2 and 0.9. Although studies on the crystallization kinetics have been carried out for a series of metallic glasses [7][8][9][10][11][12][13][14][15], data are still in deficiency on the crystallization kinetics of Fe-based metallic glasses.…”

Section: Introductionmentioning

confidence: 99%

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Crystallization Kinetics of the Fe68Nb6B23Mo3 Glassy Ribbons Studied by Differential Scanning Calorimetry

Liu

Zhu

et al. 2022

Crystals

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Fe-based metallic glass has wide industrial application due to its unique mechanical behavior and magnetic properties. In the present work, the non-isothermal crystallization kinetics in Fe68Nb6B23Mo3 glassy alloys were investigated by differential scanning calorimeter (DSC). The results indicate that both the glass transformation and crystallization process display an obvious kinetic effect. The activation energy is calculated using Kissinger’s method and Ozawar’s method. The activation energy for Tg (glass transition temperatures), Tx (crystallization initiation temperatures) and Tp (crystallization peak temperatures) calculated from Kissinger equation, is 308 ± 4, 342 ± 5 and 310 ± 7 kJ mol−1, respectively. The activation energy for Tg, Tx and Tp calculated from Ozawa equation is 322 ± 3, 356 ± 5 and 325 ± 7 kJ mol−1, respectively. With the increase of the crystallization volume fraction x, the Avrami exponent n(x) first decreases and then increases. At the preliminary step, 0 < x < 0.25, 2.5 < n(x) < 4.0 stands for the growth from a small size with an increasing nucleation rate. When 0.25 < x < 0.71, n(x) decreases from 2.5 to 1.5, indicating that this stage is controlled by the growth of small particles with a decreasing nucleation rate.

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Relaxation dynamics of Fe55Cr10Mo14C15B6 metallic glass explored by mechanical spectroscopy and calorimetry measurements

Liu

Madinehei

Pineda

et al. 2016

J Therm Anal Calorim

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6In this work, the mechanical relaxation dynamics of Fe55Cr10Mo14C15B6 metallic glass is explored by 7 mechanical spectroscopy. The temperature dependent loss modulus E''(T) shows the features of β 8 relaxation well below glass transition temperature Tg. This β relaxation can be well described in the 9 framework of anelastic theory by a thermal activated process with activation energy of 165 kJ mol -1 . 10Structural relaxation, also known as physical aging, has a large effect on the glass properties. The 11 activation energy spectrum of structural relaxation is characterized by differential scanning calorimetry 12 measuring the heat flow difference between as quenched and relaxed states. The obtained energy 13 spectrum is well described by a log-normal distribution with maximum probability activation energy of 14 176 kJ mol -1 . The obtained activation energy of structural relaxation is similar to that of β relaxation 15 observed from mechanical spectroscopy. Both values are also close to the Johari-Goldstein β relaxation 16 estimated by the empirical rule Eβ=26RTg. 17

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Non-isothermal crystallization kinetics of Zr52Cu18Ni14Al10Ti6 metallic glass

Cited by 22 publications

References 51 publications

Modification of the Ti40Cu36Zr10Pd14 BMG Crystallization Mechanism with Heating Rates 10-140 K/min

Modification of the Ti40Cu36Zr10Pd14 BMG Crystallization Mechanism with Heating Rates 10-140 K/min

Crystallization Kinetics of the Fe68Nb6B23Mo3 Glassy Ribbons Studied by Differential Scanning Calorimetry

Relaxation dynamics of Fe55Cr10Mo14C15B6 metallic glass explored by mechanical spectroscopy and calorimetry measurements

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