Article ID Journal Published Year Pages File Type
1470867 Corrosion Science 2009 8 Pages PDF
Abstract

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 °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.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
Authors
, , , ,