Mechanical and Corrosion Behaviour of Al-Fe-Nb Amorphous Alloys

Influence of the heat treatment on the crystallization mechanisms of Al85Y5Ni8Co2 metallic glass

“…In such cases, where an amorphous material is desired, alloy designers will clearly choose such chemical compositions that stabilize the glass by raising T g or T x , the glass forming or crystallization initiation temperatures. On the other hand, for those cases where a crystal-glass nanocomposite is required, it may be more relevant to look for material compositions with wide temperature gaps between the (low temperature) first crystallization temperature, where generally pure Al crystals form in the glass, and a (higher temperature) second crystallization temperature, where generally other complex intermetallic phases form [8,10].…”

“…It was found that these alloys can be formed in compositions with more than 80 at.% Al and a metal-late transition (LTM) and a rare earth (RE) [1][2][3]. The as-quenched amorphous structures exhibit high values of tensile strength [4,5], hardness [6], and more recently wear [7] and corrosion resistance [8]. These properties can be further improved after the precipitation of a thermally induced homogeneous dispersion of a-Al nanoparticles [9].…”

Primary crystallization process of amorphous Al88Ni6Sm6 alloy investigated by differential scanning calorimetry and by electrical resistivity

“…The remarkable mechanical properties of these alloys make them useful for many industrial applications due to their high tensile strength, hardness, wear and corrosion resistance [1,2]. In addition, these properties can be further enhanced by a thermal treatment inducing the formation of quasi-spherical ␣-Al nanoparticles homogeneously dispersed in the remaining amorphous matrix [3][4][5]. Many previous studies concerning Al-based amorphous alloys showed that the primary crystallization process is complex [6][7][8][9][10][11][12][13] and the classic Johnson-Mehl-Avrami (JMA) kinetic model still remains difficult to fit with the experimental data [14,15].…”

Real time synchrotron studies on amorphous Al85Ce5Ni8Co2 and Al85Y5Ni8Co2 alloys

“…It was found that these types of alloys are formed in compositional ranges above 80 at.% Al in a number of alloy systems belonging to metal-late transition metal (LTM) and rare earth (RE) [1][2][3]. The as-quenched amorphous structures exhibit high values of tensile strength [4,5], hardness [6], wear [7], and corrosion resistance [8]. Nevertheless, the low thermal stability of these materials still limits their technological applications and, what is needed are alloys with improved thermal stability in order to withstand the compacting processes required for obtaining massive products.…”