Mg-0.5Sn-0.5 Mn-0.5Ca (wt.%) alloys with different microstructures are designed through casting and extrusion with and without homogenization treatment prior to extrusion (HPE). The influence of HPE treatment on the microstructural characteristics and resultant discharge properties of Mg-Sn-Mn-Ca alloy in extruded condition as anode for Mg-air battery was investigated. HPE treatment exerts a prominent effect on the grain structure and orientation, distribution of the second phase particles as well as the dislocation density of the extruded alloy. The HPE alloy exhibits a distinctly high cell voltage together with specific energy compared with that of Non-HPE one. Intermittent discharge tests confirm that the HPE alloy possesses a more excellent discharge activity and more stable discharge process than the Non-HPE one. All results demonstrate that the HPE alloy is an attractive anode material for Mg-air battery with long-term storage and under intermittent discharge.

具有不同微观结构的Mg-0.5Sn-0.5 Mn-0.5Ca（wt。％）合金是通过铸造和挤压进行设计的，在挤压前（HPE）进行或不进行均质处理。研究了高压处理对挤压状态下作为镁空气电池阳极的Mg-Sn-Mn-Ca合金的显微组织特性和所得放电性能的影响。HPE处理对晶粒结构和取向，第二相颗粒的分布以及挤压合金的位错密度产生显着影响。与非HPE合金相比，HPE合金具有明显高的电池电压和比能。间歇放电测试证实，HPE合金比非HPE合金具有更优异的放电活性和更稳定的放电过程。