Microstructure evolution and grain size distribution in nanocrystalline FeNbBCu from synchrotron XRD and TEM analysis

Preparation and properties of sintered glass–ceramics containing Au–Cu tailing waste

“…It is routinely used for phase identification and for rough estimations of the grain size [27,28]. TEM bright-field images (a) and dark-field images (b) of T 4 sample are shown in Fig.…”

Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method

“…In order to explain the transformation mechanisms microstructural information is required. The TEM micrographs obtained after heating up to different crystallization stages (Figure 8) indicate that nucleation is present over the entire process showing a slight decrease with temperature [35] and nanocrystals with a final size of about 4–6 nm. In this case, the determination of the Avrami exponent with the fitting of constant n Avrami kinetic function is not able to explain the observed microstructure.…”

“…In this case, the determination of the Avrami exponent with the fitting of constant n Avrami kinetic function is not able to explain the observed microstructure. A simple mathematical model has been proposed to explain the observed microstructure [35]. Other authors have used other approximations as an instantaneous growth, together with a decreasing nucleation to explain the low n values encountered in these alloys [36].…”

Ordering kinetics evaluation of FeAl powders

“…On the other hand, the high intensity offered by synchrotron X-ray radiation sources coupled with modern fast timing detectors, allows getting insight on the kinetics of time-temperature atomic ordering processes. Such techniques are being applied for investigating the ordering transitions [16,17,18,19] as well as the evaluation of several material crystallization kinetics [20,21,22,23] and other reactions [24,25,26,27]. In their work on Cu 3 Au, Shannon et al, studied the order-disorder transition starting from a disordered state at an initial temperature T i above the critical one (T i > T c ) and then quenching into a region of the phase diagram where the equilibrium state is ordered (T c > T f ), T f standing for final temperature [19].…”