Activation of pyramidal II c plus a slips at room temperature in Mg-Zn-Y 18R and 14H long-period stacking ordered phases

The 18R and 14H long-period stacking ordered (LPSO) phases were generally considered that only the basal and non-basal a c+a c+a c+a slips are localized in the well-defined slip bands while the chemically ordered structure of Zn6Y8 atomic clusters is disrupted to be disordered. Additionally, the interaction also induces Zn/Y atoms segregation at the two edges of the slip band. Our results unravel the origin for the excellent room temperature plasticity in the LPSO phases.

Automated summary

The study findings revealed that the excellent room temperature plasticity in LPSO phases is achieved through localized slip and atom segregation at the edges of the slip bands, disrupting the structure of Zn6Y8 atomic clusters.