Role of minor additions on metallic glasses and composites

Abstract

Microalloying refers to the addition of a small concentration of an alloying element to tune the properties of the parent alloy. Microalloying technology enables to control the glass formation and the mechanical properties of bulk metallic glasses (BMGs). This manuscript presents a comprehensive review on recent developments and breakthroughs in the field of microalloying for tuning the properties of BMGs and composites with focus on the results. The ability of multiple element coaddition to optimize the glass formation and the importance of future alloy developments have been highlighted. Proper microalloying can be used to tailor not only the mechanical properties of the amorphous phase but also those of the crystalline phase, which opens up the possibility for tuning the mechanical performance at different length scales. The effectiveness in controlling the mechanical performance through microalloying was shown to greatly depend on the alloy composition and closeness to the critical amorphous diameter. A tentative outlook commenting the potential and challenges of this exciting field of research is also presented.

Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites

“…The detection of these phases is consistent with previous works on other ZrCu-based BMG composites [22][23][24]. The formation of the stable intermetallic phases Cu 10 Zr 7 [25], Cu 8 Zr 3 and CuZr…”

Mechanical Behaviour of Glasses and Amorphous Materials

“…Are there ideas for how such failure can be avoided? Based on the understanding of the nature of the yielding instability, various investigators have proposed the inclusion of pinning centers and micro-alloying as a way of curtailing run away instabilities [96][97][98][99][100][101][102] and thereby make annealed glasses more resistant to brittle failure, and more ductile. More such insights may arise from the development of a unified view of yielding and flow of amorphous solids in the coming years.…”

Modelling and Simulation of Solidification Phenomena during Additive Manufacturing of Bulk Metallic Glass Matrix Composites (BMGMC)—A Brief Review and Introduction of Technique

“…Conventional Casting) Physical background: Consider a BMGMC wedge shape casting as shown in solidified in water cooled wedge shape Cu-mould [78] [251]. Their dendritic grains which have various crystallographic orientations appear as zones of different colours (Figure 3(b)).…”