| 摘要 |
<p>This invention relates to an apparatus comprising: a) an article having a composition selected from the group consisting of graphite, carbon/carbon, carbon/graphite, and mixtures thereof, and b) a ceramic coating thereon, wherein the ceramic coating comprises a material selected from the group consisting of: i) a ceramic having an average thermal expansion coefficient of between 2 and 8 x 10-6/°C between 22 °C and 1200 °C which is also phase stable in the temperature range of 22 °C and 1450 °C, and ii) alumina having at least 99 % purity.</p> |
