1. High-temperature oxidation behaviour of SPS-prepared Mo and Mo–5Ta alloys.
- Author
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Liu, Dawei, Zhang, Jiuxing, Huang, Lei, Li, Song, Nong, Binrong, Jin, Ying, and Pan, Yafei
- Subjects
OXIDATION ,WEIGHT gain ,AIR conditioning ,LOW temperatures - Abstract
The high-temperature oxidation behaviour of SPS-prepared Mo and Mo–5Ta alloys are investigated under the temperature range 300–700°C for 0–120 min in static air condition. The oxidation weight gains of Mo and Mo–5Ta conform to parabolic law at different oxidation times of 500°C and all remain at low levels. At low temperature (≤ 500°C), the oxidation resistance improves with Ta addition. However, at 600°C and 700°C, the oxidation of Mo–5Ta increases and the weight gain is obvious. Compared with pure Mo, a continuous and dense oxide scale can be formed quickly on the surface of Mo–5Ta alloys during the oxidation process at 500°C, which improves the oxidation resistance of the alloys. The volatile MoO
3 and generated Ta2 O5 above 500°C cause more voids to form in the matrix, resulting in the deterioration of the oxidation resistance of the alloys. [ABSTRACT FROM AUTHOR]- Published
- 2022
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