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A new Al-5C intermediate alloy is prepared by in-situ reaction sintering method. Optical Microscope (OM), X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) are used to study the effect of the preparation process on the microstructure of Al-5C intermediate alloy and the grain refinement of Mg-Al alloy. The results show that the in-situ reaction sintering method improves the wettability of Al and C, and the reaction degree of Al-C is related to milling time, sintering temperature, sintering time and pressing method. Prolongation of milling time, increase of sintering temperature or appropriate extension of sintering time can promote the Al-C reaction, resulting in the formation of fine Al4C3 particles. Al-5C intermediate alloy can effectively refine the microstructure of Mg-3Al alloy, and the best grain refinement effect is obtained when the addition amount (mass fraction) is 2%.
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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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