Effect of SiC Content on the Ablation and Oxidation Behavior of ZrB2-Based Ultra High Temperature Ceramic Composites

被引：45

作者：

Hu, Ping ^{[1
]}

Gui, Kaixuan ^{[1
]}

Yang, Yang ^{[1
]}

Dong, Shun ^{[1
]}

Zhang, Xinghong ^{[1
]}

机构：

[1] Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Harbin 150001, Peoples R China

来源：

MATERIALS | 2013年 / 6卷 / 05期

基金：

美国国家科学基金会;

关键词：

ZrB2; SiC; ultra high temperature ceramics (UHTCs); ablation; oxidation; ZRB2-SIC COMPOSITES; SILICON-CARBIDE; ATOMIC OXYGEN; RECOMBINATION; HAFNIUM;

D O I：

10.3390/ma6051730

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：

The ablation and oxidation of ZrB2-based ultra high temperature ceramic (UHTC) composites containing 10%, 15% and 30% v/v SiC were tested under different heat fluxes in a high frequency plasma wind tunnel. Performance was significantly affected by the surface temperature, which was strongly dependent on the composition. Composites containing 10% SiC showed the highest surface temperature (>2300 degrees C) and underwent a marked degradation under both conditions. In contrast, composites with 30% SiC exhibited the lowest surface temperature (<2000 degrees C) and demonstrated excellent ablation resistance. The surface temperature of UHTCs in aerothermal testing was closely associated with the dynamic evolution of the surface and bulk oxide properties, especially for the change in chemical composition on the exposed surface, which was strongly dependent on the material composition and testing parameters (i.e., heat flux, enthalpy, pressure and test time), and in turn affected its oxidation performance.

引用

页码：1730 / 1744

页数：15

共 31 条

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