Nanocrystal development in Cu47Ti33Zr11Ni8Si1 metallic glass powders

Venkataraman, S.; Löser, W.; Eckert, J.; Gemming, Thomas; Mickel, C.; Schubert‐Bischoff, P.; Wanderka, N.; Schultz, L.; Sordelet, D.J.

doi:10.1016/j.jallcom.2005.08.009

Cited by 11 publications

(7 citation statements)

References 41 publications

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“…The JMA values are overall higher but this might be due to the difficulty in analyzing the DSC traces of the alloys with a higher Ti content (see Section 3.2). Such a discrepancy between isothermal and isochronal activation energies has been observed before [65,66]. Nevertheless the same trend becomes obvious: the activation energy of crystallization slightly decreases when the Ti content is increased from 0 to 5 at.%.…”

Section: Activation Energysupporting

confidence: 71%

Phase formation and thermal stability in Cu–Zr–Ti(Al) metallic glasses

et al. 2009

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Section: Activation Energysupporting

confidence: 71%

Phase formation and thermal stability in Cu–Zr–Ti(Al) metallic glasses

et al. 2009

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“…However, this option may be refuted by the TEM microstructural investigations. As observed in the presented TEM pictures (Figure 4), no previous nuclei are found in the as-quenched samples proving that nucleation takes place during the transformation [32,33]. A more reasonable interpretation suggests a transformation controlled by a nucleation and diffusion-controlled growth mechanism.…”

Section: Case Studiesmentioning

confidence: 50%

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

et al. 2011

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The non-isothermal transformation rate curves of metallic glasses are analyzed with the Master Curve method grounded in the Kolmogorov-Johnson-Mehl-Avrami theory. The method is applied to the study of two different metallic glasses determining the activation energy of the transformation and the experimental kinetic function that is analyzed using Avrami kinetics. The analysis of the crystallization of Cu47Ti33Zr11Ni8Si1 metallic glassy powders gives Ea = 3.8 eV, in good agreement with the calculation by other methods, and a transformation initiated by an accelerating nucleation and diffusion-controlled growth. The other studied alloy is a Nanoperm-type Fe77Nb7B15Cu1 metallic glass with a primary crystallization of bcc-Fe. An activation energy of Ea = 5.7 eV is obtained from the Master Curve analysis. It is shown that the use of Avrami kinetics is not able to explain the crystallization mechanisms in this alloy giving an Avrami exponent of n = 1.

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“…Many studies have been carried out on mechanical properties and microstructural characterization of Cu-Ti and Cu-Zr [10,11] binary alloys, Cu-Mg-Ni, Cu-Zr-Al [12,13], Cu-Zr-Ti [14], Cu-Zr-Ni, Cu-Zr-Ag [15,16] ternary alloys, Cu-Ti-Zr-Ni [17], quaternary alloys and also Cu-Ti-Zr-Ni-Be [18,19], Cu-Ti-Zr-Ni-Si [20,21] quinary alloys which manufactured by different techniques. Hence, the properties of Cu-based alloys have been improved continuously.…”

Section: Introductionmentioning

confidence: 99%