NUCLEATION BEHAVIOR OF Al8Fe4Nd PHASE IN RAPIDLY SOLIDIFIED AI-Fe-V-Si-Nd ALLOY
来源期刊：Acta Metallurgica Sinica2002年第5期
论文作者：H.Pang M.G.Zeng J.N.Deng Z.H.Jin
Key words：Al-Fe based alloy; rapid solidification; phase selection; nucleation behavior;
Abstract: The microstructure of Al-Fe- V-Si-Nd alloy prepared by rapid solidification (RS) pro-cessing was studied by X-ray diffraction (XRD), transmission electron microscopy(TEM) and high resolution electron microscopy (HREM). The phase selection of thealloy during solidification and the nucleation behavior of Al8Fe4Nd phase were ana-lyzed witinin the framework of time-dependent nucleation theory. The incubation timefor Al8Fe4Nd phase was found shorter and the nucleation rate higher than those ofα-Al. The results indicate the nucleation of Al8Fe4Nd phase is heterogeneous and thedispersoids of Al8Fe4Nd form as primary particles from the liquid, which is consistentwith experimental observation.
H.Pang1，M.G.Zeng3，J.N.Deng3，Z.H.Jin1
(1.S henyang National Laboratory for Material Science, Institute of Metal Research, CAS, Shenyang 110016,China;
2. College of Science, Northeastern University, Shenyang 110004, China;
3.College of Science, Northeastern University, Shenyang 110004, China)
Abstract:The microstructure of Al-Fe- V-Si-Nd alloy prepared by rapid solidification (RS) pro-cessing was studied by X-ray diffraction (XRD), transmission electron microscopy(TEM) and high resolution electron microscopy (HREM). The phase selection of thealloy during solidification and the nucleation behavior of Al8Fe4Nd phase were ana-lyzed witinin the framework of time-dependent nucleation theory. The incubation timefor Al8Fe4Nd phase was found shorter and the nucleation rate higher than those ofα-Al. The results indicate the nucleation of Al8Fe4Nd phase is heterogeneous and thedispersoids of Al8Fe4Nd form as primary particles from the liquid, which is consistentwith experimental observation.
Key words:Al-Fe based alloy; rapid solidification; phase selection; nucleation behavior;
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