Crystallization kinetics of Fe40Ni38Mo4B18 and Fe80B20 metallic glasses

Crystallization behaviour of Metglas 2826 MB (Fe40Ni38Mo4B18)

“…The glass subjected to constant heating rates in DSC for 10, 20, 40 and 80 K min-1 between 320 and 1000 K exhibited two exothermic peaks (the typical DSC trace for the heating rate 10K rain -~ is shown in figure 1). This agrees with the results of Antonione et al (1978) but shows disagreement with other results which reported three (Majumdar and Nigam 1980;Cumbrera et al 1982b) and four (Nicolai et al 1981) exothermic peaks, However, it can be noted that the peak temperatures for the first and second peaks reported by these investigators agree well with the present values. Additional support for the two-stage crystallization is found in the fact that for a variety of (FeNiMo)B glasses, Antonione et al (1980) have found only two stages.…”

“…Employing non-isothermal DSC measurements, Antonione et al (1978) reported two-stage crystallization processes at 703 K and 777 K having activation energies of 296 and 334 kJ tool -~ respectively for the first and second crystallization reactions. However, Majumdar and Nigam (1980) and Cumbrera et al (1982b) observed a three-stage crystallization of the glass. DTA measurement by Majumdar and Nigam (1980) showed crystallization peaks at 728, 810 and 863 K. Cumbrera et al (1982b) determined activation energies both from Kissinger (288 and 355 kJ mo1-1) and isothermal (288 and 451kJmo1-1) methods using DTA, DSC and resistivity measurements for the first two crystallization processes.…”

A study on microstructure, magnetic properties and kinetics of the nanocrystallization of Fe40Ni38B18Mo4 metglass

“…The E value for MS1 obtained by Kissinger approach was in close agreement with those obtained by Kurajica et al [21] and Antonione et al [17]. The activation energy for MS1 and MS2 reported in literature [17][18][19][20][21][22] has been presented in Table 4. It can be seen from this table that there was a large scatter in the E values determined by different approaches for both MS1 and MS2 and these were ranging from 280 to 451 kJ/mol for MS1 and from 270 to 403 kJ/mol for MS2.…”

“…The sequence of nucleation of these two phases was in agreement with those reported by Mizgalski et al [13]. However, Nicolai et al [20] and Cumbrera et al [22] have reported appearance of these two phases in reverse sequence. From the size and size distribution analysis shown in Fig.…”

On the crystallization kinetics and micro-structural transformations of Fe40Ni38B18Mo4 alloys

“…However, Majumdar and Nigam observed three stage crystallization in the material [12]. Cubrera et al carried out a quantitative investigation on the crystallization kinetics and estimated the activation energies of the two phases using both non-isothermal and isothermal methods employing DSC, DTA and resistivity measurements [13]. The respective values obtained were &2.984 eV/atom and &3.678 eV/atom from non-isothermal and &2.984 eV/atom and &4.673 eV/atom from isothermal methods for the first and second phases respectively.…”