Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 479, Issue 1-2, Pages 299-302Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2008.12.036
Keywords
ZrB2-SiC-AlN ceramic composite; Ablation resistance; High frequency plasma wind tunnel
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Funding
- National Natural Science Foundation of China [50602010]
- National Defense Foundation [24402052]
- Doctoral Program of Higher Education [24403037]
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ZrB2-20 vol.%SiC-5 vol.%AlN ceramic composites (ZSA) were fabricated by hot pressing sintering under inert gas protected, which mechanical properties were improved obviously by introducing AlN as sintering aid. Ablation tests of ZSA were conducted with different heat flux parameters in high frequency plasma wind tunnel. The results showed that ZSA exhibited excellent ablation resistance at 2000 degrees C for 300 s in oxidation environment and a dense coherent scale was formed after ablation, whereas a strong degradation and mass loss were observed at 2600 degrees C for 300 s. The ablation behavior, microstructures evolvement and the effect of AlN were analyzed. (C) 2008 Elsevier B.V. All rights reserved.
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