中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 22 No. 4 April 2012 |
Ti−Al alloys and oxide ceramics
(Key Laboratory of Aerospace Materials and Performance (Ministry of Education),
School of Materials Science and Engineering, Beihang University, Beijing 100191, China)
Abstract:The thermodynamics of interactions between various oxides (CaO, MgO, Al2O3 and Y2O3) and molten Ti and Ti alloys was investigated. The dissolution mechanism of oxides in molten Ti alloys was provided and the stability of oxides in molten Ti alloys was investigated and predicted by thermodynamic analysis. Interactions between oxides and Ti−Al melts were studied by oxide crucible melting experiments. By quantitative analysis, it is indicated that impurity contents in alloys are proportionally decreased with increasing the Al content in alloys and decreasing the melt temperature, which is in agreement with the results of the predicting thermodynamic stability.
Key words: Ti alloys; thermodynamics; oxide ceramics; interaction