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Oxidation behaviour of particle reinforced MoSi2 composites at temperatures up to 1700°C. Part II: Initial screening of the oxidation behaviour of MoSi2 composites

✍ Scribed by S. Lohfeld; M. Schütze; A. Böhm; V. Güther; R. Rix; R. Scholl

Publisher
John Wiley and Sons
Year
2005
Tongue
German
Weight
844 KB
Volume
56
Category
Article
ISSN
0947-5117

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✦ Synopsis

In the first part of this paper a literature survey on the oxidation behaviour of MoSi 2 and MoSi 2 composites has been given. The present second part reports about the experimental results from oxidation tests with several MoSi 2 composites containing 15 vol.-% Al 2 O 3 , Y 2 O 3 , ZrO 2 , HfO 2 , SiC, TiB 2 , ZrB 2 , or HfB 2 , respectively, from different development stages. The tests were conducted at 1600 8C in air for 100 hours. It was shown that the production route of the powders has a significant influence on the performance of the materials at high temperatures. This was attributed to contaminations. Additionally, the results indicated that only the composites with SiC, ZrO 2 or HfO 2 , respectively, are suitable for application above 1500 8C. A more detailed report about the optimised material will follow in the third part of this paper.

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