期刊
INTERMETALLICS
卷 110, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2019.106483
关键词
Titanium aluminides; Annealing; Diffusion; Kinetics; Modeling; Concentration gradient
资金
- Shandong Provincial Natural Science Foundation, China [ZR2017BEM001, ZR2018PEM008]
- National Natural Science Foundation of China [51701081, 51872118]
- young-aged talents lifting project from Shandong Association for Science Technology [301-1505001]
- University of Jinan [XKY1712, XKY1713, XKY1728, 511-1009406]
The aim of the present work is to investigate the dependence of concentration gradient on diffusion kinetics of Ti-Al binary system at high temperatures, which is a long-standing physical problem that cannot easily addressed by tradition diffusion couple experiments due to the ultralow melting point of Al and complicated compositions of various titanium aluminides. We conceived and established a simplified Fick-based diffusion model, making use of successive concentration gradient, in combination with experiments, to reveal the concentration-governed diffusion behavior. Our results showed an excellent agreement with currently available diffusion models. Therefore this approach was expected to be extensively applied to other binary system with large deviations in the melting points.
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