In situ study of the oxidation of ZrB2 and ZrB2-SiC materials by monitoring the LIF signal of BO2 radicals

被引：6

作者：

Guerineau, V. ^{[1
]}

Julian-Jankowiak, A. ^{[1
]}

Vilmart, G. ^{[2
]}

Dorval, N. ^{[2
]}

机构：

[1] Univ Paris Saclay, ONERA, DMAS, F-92322 Chatillon, France

[2] Univ Paris Saclay, ONERA, DPHY, F-91123 Palaiseau, France

来源：

CORROSION SCIENCE | 2019年 / 148卷

关键词：

Ceramic; High temperature corrosion; Oxidation; Spectroscopy; Laser induced fluorescence; DIBORIDE-SILICON-CARBIDE; HIGH TEMPERATURE CERAMICS; ABLATION BEHAVIOR; COMPOSITES; ZIRCONIUM; EVOLUTION; AIR; RESISTANCE; CONVECTION; SPECTRUM;

D O I：

10.1016/j.corsci.2018.11.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the Laser Induced Fluorescence (LIF) technique is used to detect BO2 radicals in the gas phase above heated ZrB2 and ZrB2-20 vol. % SiC samples in air, in order to provide an in situ and real-time monitoring of their thermal oxidation. Samples are heated up to 1923 K in air flow with a 2 kW CO2 laser. The BO2 fluorescence and the laser transmission signals are monitored throughout the temperature ramp. This technique allows to detect the key steps of the oxidation (silica formation, ... ) and to propose more precise oxidation mechanisms as a function of temperature.

引用

页码：31 / 38

页数：8

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