The 18R and 14H long-period stacking ordered (LPSO) phases were generally considered that only the basal and non-basal <a> slips and kink banding could be activated during quasi-state deformation at room temperature. Here, we confirm that the pyramidal II <c+a> slips can also be activated in the 18R LPSO phase by quasi-state nanoindentation and in the 14H LPSO phase by cold roll with a rolling direction parallel to the (0001) plane. Due to the interaction between the Zn₆Y₈ atomic clusters in the LPSO phases and the pyramidal II <c+a> dislocations, the pyramidal II <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.

的18R和14H长周期叠层（LPSO）相一般认为只有基底和非基底<一>单和扭结绑扎可以在室温下准状态变形期间被激活。在这里，我们确认，金字塔形II < c + a >滑移也可以通过准态纳米压痕在18R LPSO相中激活，而在14H LPSO相中通过与平行于（0001）面的滚动方向的冷轧激活。由于LPSO相中的Zn ₆ Y ₈原子簇与金字塔II < c + a >位错之间的相互作用，金字塔II < c + a>滑移位于定义明确的滑移带中，而Zn ₆ Y ₈原子簇的化学有序结构被打乱。另外，相互作用还引起滑移带的两个边缘处的Zn / Y原子偏析。我们的结果揭示了LPSO相中出色的室温可塑性的起源。