Compressive property and energy absorption characteristic of interconnected porous Mg-Zn-Y alloys with adjusting Y addition

The pore size of porous Mg-Zn-Y was calculated by the Nano Measure digital photography and image analysis soft-ware. The microstructures of the porous Mg-Zn-Y were ob-served using an optical microscope (OM, MDJ-DM320). The second dendrite arm spacing (SDAS) and the volume fractionof the second phase were counted by the OM image software (Nano Measure and Image J). The phase compositions of the porous Mg-Zn-Y were de-tected with X-ray diffraction (XRD, Cu-K α, D/MAX-2500). The microstructure and phase morphology of the porous Mg-Zn-Y were observed by a scanning electron microscope (SEM, ZEISS EVO-18, TESCAN VEGA3) equipped with an X-ray energy-dispersive spectrum analyzer (EDS, OXFORDModel Link-Isis). The SEM samples were selected from foam struts. These foam struts were ground using many abrasive pa-pers. Afterwards, they were mechanically polished and then etched in a mixed acid solution for approximately 12 s. The details of the microstructure and phase structure were further observed by a transmission electron microscope (TEM, JEOL JEM-2100F). The TEM sample was selected from the foam struts. The foam struts were grinded to make thin foils. These foils were pretreated using the argon ion thinning tech-nique for further TEM observation.