MICROSTRUCTURE AT THE INTERFACE OF TITANIUM CARBIDE AND NICKEL ALUMINIDES
Shen Dian-hong (沈电洪), Wu Xing-fang (吴杏芳)a, Lu Hua (陆华), N. Frouminb, M. Polakb
State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;a Department of Materials Physics, University of Sciences and Technology of Beijing, Beijing 100083, China; b Department fo Material and Engineering, Ben-Gurion University of the Negev, P. O. Box 653, Beer-Sheva 84105, Israel
Abstract Microstructure at the interface of titanium carbide and nickel aluminides in the samples obtained by infiltration of molten Ni3Al alloy has studied by a scanning electron microscopy (SEM) and an analytical transmission electron microscopy (ATEM) with an energy dispersive spectrometer (EDS). It is found that the morphology at the interfaces between hard phase skeleton of TiC0.7 and metallic phases depends on the ratio of Ti/C in carbide. Some periodic zigzag fringes are observed at a smooth interface between metallic phase and carbides in the sample of Ni3Al/TiC0.7. The results of analysis using EDS show that Ti in TiC0.7 carbide is easier than that in TiC0.7 to dissolve into the molten alloy during solid-liquid reaction. The formation of this periodic zigzag fringe,which may be a growth zone of a new Ti-Ni-Al phase,in the interface of TiC0.7/Ni3Al would occur during the initial stage of solidification.
Received: 15 March 2000
Accepted manuscript online:
(X-ray, M?ssbauer, and other γ-ray spectroscopic analysis methods)
Fund: Project supported by the China and Israel join-program, the Ministry of Sciences and Technology of China (ZYJ01-01).
Cite this article:
Shen Dian-hong (沈电洪), Wu Xing-fang (吴杏芳), Lu Hua (陆华), N. Froumin, M. Polak MICROSTRUCTURE AT THE INTERFACE OF TITANIUM CARBIDE AND NICKEL ALUMINIDES 2000 Chinese Physics 9 528
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