中国物理B ›› 2000, Vol. 9 ›› Issue (7): 528-531.doi: 10.1088/1009-1963/9/7/011

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MICROSTRUCTURE AT THE INTERFACE OF TITANIUM CARBIDE AND NICKEL ALUMINIDES

N. Froumin1, M. Polak1, 吴杏芳2, 沈电洪3, 陆华3   

  1. (1)Department fo Material and Engineering, Ben-Gurion University of the Negev, P. O. Box 653, Beer-Sheva 84105, Israel; (2)Department of Materials Physics, University of Sciences and Technology of Beijing, Beijing 100083, China; (3)State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2000-03-15 出版日期:2000-07-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the China and Israel join-program, the Ministry of Sciences and Technology of China (ZYJ01-01).

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   

  1. 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
  • Received:2000-03-15 Online:2000-07-15 Published:2005-06-12
  • Supported by:
    Project supported by the China and Israel join-program, the Ministry of Sciences and Technology of China (ZYJ01-01).

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摘要： 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.

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.

Key words: titanium carbide, nickel aluminides, interface, microstructure

中图分类号:  (Solid-liquid transitions)

  • 64.70.D-
68.35.Ct (Interface structure and roughness) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 68.37.Lp (Transmission electron microscopy (TEM)) 81.30.Fb (Solidification) 82.80.Ej (X-ray, M?ssbauer, and other γ-ray spectroscopic analysis methods)