Effects of LaB6 addition on arc-jet convectively heated SiC-containing ZrB2-based ultra-high temperature ceramics in high enthalpy supersonic airflows

被引：55

作者：

Monteverde, Frederic ^{[1
]}

Alfano, Davide ^{[2
]}

Savino, Raffaele ^{[3
]}

机构：

[1] Inst Sci & Technol Ceram, Natl Res Council Italy, I-48018 Faenza, Italy

[2] Italian Aerosp Res Ctr, I-81043 Capua, CE, Italy

[3] Univ Naples Federico II, Dept Aerosp Engn, I-80125 Naples, Italy

来源：

CORROSION SCIENCE | 2013年 / 75卷

关键词：

Ceramic matrix composites; SEM; XRD; Modelling studies; Oxidation; Oxide coatings; ZRB2-SIC COMPOSITES; ZIRCONIUM DIBORIDE; OXIDATION BEHAVIOR; IN-SITU; OXYGEN; EMITTANCE; KINETICS; TESTS;

D O I：

10.1016/j.corsci.2013.06.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The performances of a ZrB2-SiC-LaB6 ultra-high temperature ceramic (UHTC) was investigated in high enthalpy supersonic air flow. The UHTC material reached and maintained steady-state radiative surface temperature of 1973 K (monitored by pyrometer) for 5 min, and survived the arc-jet plasma exposure without any optical evidence of mechanical damage. The oxide scale covering externally the sample evolved into different textures. Transient thermal analysis processed via CFD provided a good agreement between the numerical steady-state temperature and the temperature distribution obtained experimentally. The contemporary addition of LaB6 and SiC to ZrB2 had a detrimental effect on the overall oxidation resistance. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：443 / 453

页数：11

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