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A novel ultra-high temperature oxidation technique
in flowing gas with controlled oxygen partial pressure |
| Jing-Jun XU1,Mei-Shuan LI2,Xue-Liang FANG3,Zhong-Wei ZHANG3,Zheng-Hui XU3,Jun-Shan WANG3, |
| 1.Shenyang National Laboratory
for Materials Science, Institute of Metal Research, Chinese Academy
of Sciences, Shenyang 110016, China；Graduate School of Chinese
Academy of Sciences, Beijing 100039, China; 2.Shenyang National Laboratory
for Materials Science, Institute of Metal Research, Chinese Academy
of Sciences, Shenyang 110016, China; 3.Aerospace Research Institute
of Materials and Processing Technology, Beijing 100076, China; |
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Abstract For the purpose of investigating ultra-high temperature oxidation, a novel induction heating facility has been established. The oxidation kinetics of several typical ultra-high temperature materials (UHTMs), including two graphite-based composites (C/C and ZrB2/C) and two ternary Zr-Al-C ceramics (Zr2Al3C4 and Zr2[Al(Si)]4C5), were tested by utilizing this facility. It has been identified that the tested cylindrical samples with dimensions of Φ 20mm × 20 mm can be oxidized uniformly. The maximum temperature of 2450°C can be achieved on graphite-based composites, and the oxygen partial pressure can be controlled in the range of 102–105Pa. This novel technique exhibits many advantages, such as an extremely high heating rate of about 20°C/s, easy controlling of temperature and gas pressure, low energy consumption, low cost, and high efficiency. Therefore, it provides a potential way for profoundly investigating the ultra-high temperature oxidation behaviors of UHTMs.
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| Keywords
induction heating
ultra-high temperature oxidation
oxidation kinetics
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Issue Date: 05 September 2010
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