Spectral and total emissivity of high-temperature materials

被引：118

作者：

Neuer, G ^{[1
]}

Jaroma-Weiland, G ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Nucl Technol & Energy Syst, D-70550 Stuttgart, Germany

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 1998年 / 19卷 / 03期

关键词：

coatings; C/C-SiC composites; emissivity; oxidation protection; polysilazane; reference materials; SiC coatings;

D O I：

10.1023/A:1022607426413

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A number of various high emissivity coatings has been investigated in detail. Oxide ceramic coatings for rotating x-ray anodes must have a total emissivity greater than 0.8 in order to ensure efficient cooling in vacuum, Only one of the investigated coatings showed sufficient long-term stability. For thermal protection of reusable space transportation systems during atmospheric reentry, in addition to high emissivity, oxidation resistance is required. SiC coatings and special polysilazane-based coatings have been tested. Results of emissivity measurements before and after flight experiments on the Russian FOTON capsule are also available. In order to improve the reliability of (high-temperature) emissivity measurements Pt-Rh alloys, SIG, Al2O3 doped with Cr2O3, and graphite have been tested to assess applicability as reference materials for comparative emissivity measurements by various facilities.

引用

页码：917 / 929

页数：13

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