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Outline
The synthesizing diamond experiment was carried out with iron-based catalysts made by powder metallurgy using industrial iron and nickel powder as stuff at cubic high pressure apparatus. By employing Raman spectroscopy and X-ray diffraction, it can be proved that the crystal gotten from the experiment whose grain size is 200~500 μm is cubic diamond single crystal. The results of the mechanical property test indicate that the quality of diamond exceeds the standard of SMD25. By analysis, it can be judged that the process of diamond nucleation is the one that the molten alloy dissolves and catalyses the carbon atoms. Based on a lot of results, it can be illustrated that the carbon, which is needed for diamond growth, comes from the (Fe, Ni)3C under the absorption of γ-(Fe, Ni) and the film is not only the diffuse path of carbon, but also the catalysts of structure deformation.
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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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