In situ formation of two glassy phases in the Nd–Zr–Al–Co alloy system

Spinodal decomposition of Ni–Nb–Y metallic glasses

“…In 2004, Kündig et al reported two-phase glassy alloys in the Zr-La-Al-Ni-Cu system [6]. In the following years, phase separated metallic glasses were successfully prepared in several alloy systems: Zr-Y-Co-Al [7], Ni-Nb-Y [8], ZrNd-Al-Co [9], Cu-(Zr,Hf)-(Gd,Y)-Al [10], and Zr-(Ce,Pr,Nd)-Al-Ni [11]. In all these cases, phase separation leads to a special microstructure with a length-scale up to several micron and some self similar features are observed by transmission electron microscopy (TEM) [6,12,13].…”

The Microstructure and Thermal Stability of the Two-Component Melt-Spun Ni55Fe20Cu5P10B10 TCMS Amorphous/Amorphous Composite

“…Amorphous/crystalline metallic alloys are based on liquid immiscible alloys [1,[3][4][5][6]. An interesting group of two-phase metallic glasses is prepared on the basis of liquid immiscible alloys in such systems as LaZr-Al-Cu-Ni [7], Nd-Zr-Al-Co [8], and Ni-Nb-Y [7]. * corresponding author; e-mail: kziewiec@up.krakow.pl…”

Nano-scale Shell in Phase Separating Gd-Ti-Al-Co Metallic Glass

“…In order to design such metallic glasses, two perquisites should be considered: (1) Two different liquid phases should exist in the melt by proper addition of alloying element which has positive enthalpy of mixing with at least one of the constituent elements; and (2) Glass forming ability of the two liquid phases should be enough to ensure the formation of two different amorphous phases in the solid state. So far, the phase separation phenomena have been reported in several glass forming systems (Park et al, 2004;Mattern et al, 2005;Park et al, 2007, Chang et al, 2010. It has been also shown that droplet or interconnected type microstructure can be formed with two different microstructure formation mechanisms, i.e., spinodal decomposition or nucleation and growth which are determined by the alloy composition (Chang et al, 2010;Park et al, 2004;Park et al, 2006).…”