| タイトル | The electrical properties of low-g processed immiscible alloys |
| 著者（英） | Lacy, L. L.; Otto, G. H. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1974-06-01 |
| 言語 | eng |
| 内容記述 | When dispersed or mixed immiscibles are solidified on earth, a large amount of separation of the constituents takes place due to differences in densities. However, when the immiscibles are dispersed and solidified in zero-gravity, density separation does not occur, and unique composite solids can be formed with many new and promising electrical properties. By measuring the electrical resistivity and superconducting critical temperature of zero-g processed Ga-Bi samples, it has been found that the electrical properties of such materials are entirely different from the basic constituents and the ground control samples. The finest dispersions are obtained only in a low-gravity environment. Our results indicate that space-processed immiscible materials may form an entirely new class of electronic materials. The interesting electrical properties of directionally solidified Al-Cu eutectic, a two-component alloy consisting of Al and Al2Cu which was processed on Skylab (M566) are briefly reviewed. The electrical resistivity of directionally solidified eutectics with a lamellar structure are highly anisotropic and have been studied both experimentally and theoretically. The local resistivity of the space-processed samples are compared to a ground control sample and to the expected theoretical results. |
| NASA分類 | MATERIALS, METALLIC |
| レポートNO | 74N29925 |
| 権利 | No Copyright |
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