| タイトル | Supercooling effects in faceted eutectic Nb-Si alloys |
| 著者（英） | Gokhale, A. B.; Haygarth, J. C.; Sarkar, G.; Wojcik, C.; Abbaschian, G. J. |
| 著者所属（英） | Teledyne Wah Chang|Florida Univ. |
| 発行日 | 1988-01-01 |
| 言語 | eng |
| 内容記述 | The effect of melt supercooling on the microstructure of an Nb-58 at. pct Si alloy is investigated experimentally using an electromagnetic levitation apparatus. It is found that, starting with an alloy nominally of eutectic composition, nucleation of Nb5Si3 occurs in the supercooled liquid first. Upon further cooling, the remaining liquid continues to supercool until the second phase, NbSi2 is nucleated, which is commonly accompanied by rapid recalescence. The primary phase exibits a eutectoid-type decomposition. The observations are discussed with reference to the results of quantitative microstructural measurements, compositional and thermal analysis, and preliminary thermodynamic modeling of the phase diagram. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 89A19619 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/366399 |
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