| 摘要 |
<p>Si3N4 CERAMIC ARTICLES HAVING LOWER DENSITY OUTER LAYER, AND METHOD Monolithic Si3N4 ceramic bodies having a lower density outer layer are produced by a one-step sintering in an ambient atmosphere of water vapor and a nonreactive diluent gas, and are useful, for exalmple, as abradable seal and impact resistant structural elements. D-22,191</p> |
