Crystallization of amorphous Zr60Al15Ni25 alloy

Investigation of precipitation phases in as-cast wedge ingot of bulk amorphous Zr56.6Cu17.3Ni12.5Al9.6Ti4 alloy

“…It is generally known that under a near-equilibrium condition, many intermetallic phases may be formed between the atom pairs of Zr-Ni, Zr-Cu, Zr-Al, Ni-Al, Ni-Ti, Al-Ti, etc., in this quinary Zr-Cu-Ni-Al-Ti alloy system [24]. However, it is known through our investigations that only several phases are formed in the partially crystallized structures, which means that the precipitation of most intermetallic phases is stopped for less driving forces of crystallization, or the restriction of kinetic conditions.…”

In situ synchrotron SAXS study of nanocrystallization in Zr65Ni25Ti10 metallic glass

“…On the other hand, some different intermetallic compounds are also frequently reported in the crystallization of Zr-based metallic glasses [27e29]. Li et al [27] found that the primary phase was not an fcc Zr 2 Ni but a hexagonal Zr 6 Al 2 Ni compound when the Zr 60 Al 15 Ni 25 amorphous ribbons were annealed in the temperature range from 705.5 to 733 K. The different behaviors of primary crystallization are closely related to the chemistry-phase stability and kinetic aspects in the crystallization of amorphous alloys. In our case of Zr 65 Ni 25 Ti 10 alloy, the stable crystallized phase is a bctZr 2 Ni phase.…”

“…The related work will be published elsewhere [30]. For the case of Zr 60 Al 15 Ni 25 alloy studied by Li et al [27] and Köster and Meinhardt [25], one of the stable phases can be hexagonal Zr 6 Al 2 Ni compound due to strong chemical interaction of Zr with both Ni and Al. However, the kinetic condition of primary crystallization may be favorable to the formation of metastable fcc Zr 2 Ni phase.…”

Crystallization of Fe78Si9B13 bulk crystaline/amorphous (c/a) composite

“…During the quenching, the crystalline is bathed in the super-cooled liquid (see Fig.7 grey colored zone). Although the liquid is undercooled, its temperature is high and elements diffuse much easier than that in a solid state [15,16] . That means element Si is able to diffuse to the liquid matrix from the precipitated α-Fe.…”