Mg-Zn-Y alloys with long-period stacking ordered structure: In vitro assessments of biodegradation behavior

In in vitro conditions, degradation processes of the Mg alloys are time-dependent, which can be described using an exponential decay function of WR = exp(a + bt + ct2), where WR is normalized residual mass/volume of the alloy or implant. We define the time point at 50% of mass loss as degradation half-life period (t0.5). As a representative, the figure shows the in vitro degradation process of as-cast Mg100 − 3x(Zn1Y2)x (1 ≤ x ≤ 3) alloys.