| タイトル | Ultrasonic velocity for estimating density of structural ceramics |
| 本文（外部サイト） | http://hdl.handle.net/2060/19820006486 |
| 著者（英） | Herbell, T. P.; Watson, G. K.; Moore, T. J.; Klima, S. J. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1981-01-01 |
| 言語 | eng |
| 内容記述 | The feasibility of using ultrasonic velocity as a measure of bulk density of sintered alpha silicon carbide was investigated. The material studied was either in the as-sintered condition or hot isostatically pressed in the temperature range from 1850 to 2050 C. Densities varied from approximately 2.8 to 3.2 g cu cm. Results show that the bulk, nominal density of structural grade silicon carbide articles can be estimated from ultrasonic velocity measurements to within 1 percent using 20 MHz longitudinal waves and a commercially available ultrasonic time intervalometer. The ultrasonic velocity measurement technique shows promise for screening out material with unacceptably low density levels. |
| NASA分類 | NONMETALLIC MATERIALS |
| レポートNO | 82N14359
E-1026-5
DOE/NASA/51040-35
NASA-TM-82765 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/167355 |
