| タイトル | Study of ceramic products and processing techniques in space |
| 本文（外部サイト） | http://hdl.handle.net/2060/19750012490 |
| 著者（英） | Oldfield, W.; Markworth, A. J. |
| 著者所属（英） | Battelle Columbus Labs.|Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1974-12-01 |
| 言語 | eng |
| 内容記述 | An analysis of the solidification kinetics of beta alumina in a zero-gravity environment was carried out, using computer-simulation techniques, in order to assess the feasibility of producing high-quality single crystals of this material in space. The two coupled transport processes included were movement of the solid-liquid interface and diffusion of sodium atoms in the melt. Results of the simulation indicate that appreciable crystal-growth rates can be attained in space. Considerations were also made of the advantages offered by high-quality single crystals of beta alumina for use as a solid electrolyte; these clearly indicate that space-grown materials are superior in many respects to analogous terrestrially-grown crystals. Likewise, economic considerations, based on the rapidly expanding technological applications for beta alumina and related fast ionic conductors, reveal that the many superior qualities of space-grown material justify the added expense and experimental detail associated with space processing. |
| NASA分類 | NONMETALLIC MATERIALS |
| レポートNO | 75N20562
NASA-CR-142575 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/190520 |
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