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The shock compression properties for permanent magnet Nd2Fe14B were studied in the shock pressure range of 19~78 GPa, using a two-stage light-gas gun. The Hugoniot data of Nd2Fe14B with initial average density 7.346 g/cm3 were measured by the impedance matching method. The experiment results indicate a good linearity between the shock wave velocity and the particle velocity i.e. C0, λ are obtained as 3.686 km/s, 1.059. Shock compression curve in the Nd2Fe14B shows a stable compression course and there is no evidence phase transition in present pressure range. The small λ displays that the Nd2Fe14B material leans to loosen state and is prone to compression. At the same time, it also provides corresponding experiment parameters for calculation of EOS and application of pulse power resource.
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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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