Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1583490 | Materials Science and Engineering: A | 2007 | 7 Pages |
Abstract
In order to improve the oxidation resistance of carbon fibers reinforced carbon matrix composites (C/C) and the thermal shock resistance of ultra-high temperature ceramics (UHTCs), large numbers of ZrB2 based particles were introduced into C/C composites to fabricate the C/C-UHTC composites by powder infiltration (PI) and isothermal chemical vapor infiltration (ICVI). The effects of UHTC additive, heat flux and ablation time on the ablation behaviors of the C/C-UHTC composites were investigated through exposure to an oxyacetylene torch flame with ultra-high temperature. The ZrB2 addition to the C/C pronouncedly improved the ablation resistance of the material under a 3920Â kW/m2 heat flux and the C/C-ZrB2 showed a better ablation-resistive property compared to the C/C-4ZrB2-1SiC, C/C-2ZrB2-1SiC, C/C-2ZrB2-1SiC-1HfC and C/C-2ZrB2-1SiC-1TaC. With decrease of the heat flux from 3200 to 2380Â kW/m2, the presence of a small amount of SiC in the C/C-ZrB2 was found to have a positive role of improving the ablation resistance; the C/C-4ZrB2-1SiC exhibited a good ablation-resistive endurance under 2380Â kW/m2. The HfC addition was proved to effectively enhance the ablation property of the C/C-1ZrB2-2SiC while the TaC addition severely deteriorated the property.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Sufang Tang, Jingyi Deng, Shijun Wang, Wenchuan Liu, Ke Yang,