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Outline
The wear ratio, resistance, integrality and hardness of polycrystalline diamond compacts (PDC) are investigated. The high pressure sintering processes are optimized using orthogonal experiments. According to our experimental results, the optimized parameters for the high pressure sintering of PDC are determined as below: pressure 5.5 GPa, temperature 1 350 ℃, temperature rising rate 200 ℃/min, cooling time 14 min, and sintering time 16 min. It is found that the wear ratio and micro-hardness can be improved by increasing sintering temperature. The temperature distribution in the sample cell is reduced and PDC microstructure becomes more uniform by prolonging the heating time. The residual stress is also found to be decreased by prolonging the cooling time.
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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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