| タイトル | Effect of Processing Pressure on Isolated Pore Formation during Controlled Directional Solidification in Small Channels |
| 著者（英） | Lee, Chun P.; Anilkumar, Amrutur V.; Grugel, RIchard N.; Cox, Matthew C. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 2008-01-01 |
| 言語 | eng |
| 内容記述 | Directional solidification experiments were performed, using succinonitrile saturated with nitrogen gas, to examine the effects of in-situ processing pressure changes on the formation growth, and evolution of an isolated, cylindrical gaseous pore. A novel solidification facility, capable of processing thin cylindrical samples (I.D. < 1.0 mm), under controlled pressure conditions, was used for the experiments. A new experimental method for growing the isolated pore from a seed bubble is introduced. The experimental results indicate that an in-situ processing pressure change will result in either a transient change in pore diameter or a complete termination of pore growth, indicating that pressure changes can be used as a control parameter to terminate bubble growth. A simple analytical model has been introduced to explain the experimental observations. |
| NASA分類 | Chemistry and Materials (General) |
| レポートNO | MSFC-2018 |
| 権利 | No Copyright |
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