논문 해외 국제전문학술지(SCI급) Interface Reactions and Reaction Synthesis of a High Temperature Composite System
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2007-02
- 저자명 J. S. Park1,* , J. Cho1 , B. Y. Hur2 , and J. H. Perepezko3
- 학술지명 METALS AND MATERIALS International
- 발행처명 SPRINGER LINK
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
홈페이지
논문 초록 (Abstract)
Reactive diffusion during isothermal annealing was examined in a Ti−Al−Si temary system. When a TiAl/TiSi2 reaction couple was annealed at 1373 K for 200 h, the product phase sequence was observed as TiAl/TiAl2/Ti2Al5/TiAl3/Ti5Si4/TiSi/TiSi2, in which the integrated diffusion coefficient of Ti2Al5 showed the lowest value. A Ti-rich Ti5Si3 phase appeared when an additional Ti flux was provided between the TiAl/TiSi2 reaction. The growth kinetics for both the TiAl/TiSi2 (direction reaction) and TiAl/Ti/TiSi2 reactions (Ti biased reaction) were identified, and a comparison of the morphology of the product phases was provided. The chemical potential variation and mass balance exhibited guidance in predicting the diffusion pathway during isothermal annealing. It appears that a biasing reaction (i.e., controlling component flux) is an effective tool for the phase selection and morphology changes during isothermal annealing.