| タイトル | Vacuum melting and mechanical testing of simulated lunar glasses |
| 著者（英） | Pletka, B. J.; Carsley, J. E.; Blacic, J. D. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1992-01-01
1992 |
| 言語 | eng |
| 内容記述 | Lunar silicate glasses may possess superior mechanical properties compared to terrestrial glasses because the anhydrous lunar environment should prevent hydrolytic weakening of the strong Si-O bonds. This hypothesis was tested by melting, solidifying, and determining the fracture toughness of simulated mare and highlands composition glasses in a high vacuum chamber. The fracture toughness, K(IC), of the resulting glasses was obtained via microindentation techniques. K(IC) increased as the testing environment was changed from air to a vacuum of 10 exp -7 torr. However, this increase in toughness may not result solely from a reduction in the hydrolytic weakening effect; the vacuum-melting process produced both the formation of spinel crystallites on the surfaces of the glass samples and significant changes in the compositions which may have contributed to the improved K(IC). |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 93A42081 |
| 権利 | Copyright |
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