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Outline
This study focuses on Mg-1.5In-0.2Ca-xZn alloys. As-cast alloys with different mass fractions of Zn （0.25%，0.5%，1.0%，1.5%，and 2.0%） are prepared by gravity casting. The influence of Zn mass fractions on the microstructure，corrosion resistance，and discharge performance of the alloys is investigated. Based on the alloy with the optimal Zn mass fraction screened out，the regulation mechanism of extrusion temperatures （375，400，425 ℃） on its performance is studied. The results show that when the Zn mass fraction is 0.5%，the as-cast alloy has the lowest area fraction of secondary phases and the strongest discharge activity. Its energy density reaches 1948.14 Wh·kg-1 at current density of 10 mA·cm⁻2. After extrusion at 400 ℃，the alloy undergoes complete dynamic recrystallization. The grain size is refined to 8.5 μm，forming a uniform microstructure. At current density of 10 mA·cm⁻2，its energy density increases to 2193.37 Wh·kg-1 and the anodic efficiency reaches 69.46%.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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