Pore structure of porous Mg-1Mn-xZn alloy fabricated by metal–gas eutectic unidirectional solidification

摘要: Abstract Lotus-type porous Mg–1 wt.% Mn–xZn (x = 0 wt.%, 1 wt.% and 2 wt.%) alloys were fabricated by metal–gas eutectic unidirectional solidification (the Gasar method). Effects of Zn addition the fabrication process on porosity, pore diameter microstructure Mg investigated. from 0 wt.% to 1 2 Mg–1 Mn alloy decreased porosity 41.2% 36.9% 35.8%, respectively, with same preparation processing. In lotus-type Mg–1 wt.%Mn–1 wt.%Zn alloy, porosities average diameters changed hydrogen pressures 0.1 0.6 MPa. Conical areas that rich in elemental existed below directional pores, precipitates also found conical areas. Homogeneous pores lower portion ingot, coarser finer non-directional formed upper part. A theoretical model change pressure agreed well calculated steady bubble growing area. The compressive strength Mg-1 wt.Mn-Zn can be increased around 20 MPa through rising Zinc content wt.%, which basically linearly decline increasing porosity. This work provides basis for Mg–Zn–Mn synthesis biological applications shows is a promising method fabricate controllable structure.