PARTICULATE-CONTAINING GLASS SEALANTS FOR CARBON-CARBON COMPOSITES

被引：24

作者：

BUCHANAN, FJ

LITTLE, JA

机构：

[1] Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB2 3QZ, Pembroke Street

来源：

CARBON | 1995年 / 33卷 / 04期

关键词：

CARBON-CARBON COMPOSITES; GLASS SEALANTS; PARTICULATES; OXIDATION RESISTANCE;

D O I：

10.1016/0008-6223(94)00174-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new coating system to minimise high-temperature oxidation and degradation for C-C composites has been examined in both isothermal tests and in cyclic tests after water vapour has been introduced. The coatings used consisted of various multilayers containing CVD boron, CVD-SiC, and glasses containing both boron powder and SiC particles. For all coatings investigated, significant improvements in oxidation resistance were observed, with some coatings giving a very high degree of protection after as many as three cycles. Microscopic and analytical studies revealed that there was very little degradation of the underlying C-C sample, and that a change in the elemental ratios present in the coating revealed that the oxidation of the SiC particles in SiO2 significantly enhanced the barrier to oxygen penetration to the coating.

引用

页码：491 / 497

页数：7

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