| タイトル | Development and evaluation of die and container materials |
| 本文（外部サイト） | http://hdl.handle.net/2060/19790008200 |
| 著者（英） | Wills, R. R.; Niesz, D. E. |
| 著者所属（英） | Battelle Columbus Labs. |
| 発行日 | 1979-01-15 |
| 言語 | eng |
| 内容記述 | X = 0.75 Beta prime Sialon (a silicon aluminum oxynitride) and Sibeon (silicon beryllium oxynitride) are promising die materials. In sessile drop tests in contact with molten silicon, beryllium contamination was less than ppm and aluminum contamination 50 ppm. A shaping die of the Sialon material was successfully fabricated. Dry milling studies for the preparation of Si3N4-Al2O3-ALN mixtures were performed with butanol, acetic anhydride, oleic acid, and triethanolamine milling aids. Optimum mixing was achieved with 0.15 percent triethanolamine using a milling time of 8 hours. Preliminary evaluation of Sibeon materials indicates that they are more resistent to molten silicon attack than Sialon. Silicon contamination from the beryllium was less than aluminum contamination even though the aluminum impurity level in the Sibeon was only 450 to 1300 ppm. Work designed to produce an aluminum-free Sibeon is described. |
| NASA分類 | ENERGY PRODUCTION AND CONVERSION |
| レポートNO | 79N16371
QPR-5
DOE/JPL-954876-79/1
NASA-CR-158087 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/176631 |
