期刊
CORROSION SCIENCE
卷 51, 期 1, 页码 54-61出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2008.09.037
关键词
Ceramic matrix composites; SEM; Oxidation
A comparison was presented of the thermal and ablation behaviors of two carbon fiber reinforced ceramic-matrix composites (one with a SiC matrix and the other with a ZrB2-SiC matrix). The C/SiC composite possessed a lower thermal conductivity (TC) and a higher emissivity in comparison to the C/ZrB2-SiC composite. The two composites exhibited the good ablation-resistive properties with no obvious erosion rate after the arc-heated wind tunnel ablation tests. The surface of the C/SiC composite appeared to be coarse and had many rounded protrusions while a denser and more homogeneous glass oxide scale was formed for the C/ZrB2-SiC composite. The maximum surface and back side temperatures of the C/ZrB2-SiC composite were about 50 degrees C lower than those of the C/SiC composite, respectively, which was mainly attributed to the evaporation of the B2O3 as well as its higher TC. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.
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