Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 22    No. 4    April 2012

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Thermodynamic analysis of interactions between
Ti−Al alloys and oxide ceramics
CUI Ren-jie, TANG Xiao-xia, GAO Ming, ZHANG Hu, GONG Sheng-kai

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

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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