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Citation: Zhang Lin, Wu You-Shi, Bian Xiu-Fang, Li Hui. Correlation between Liquid Structure and the Chemical Short-range Order of Al-Fe-Ce Amorphous Alloy[J]. Acta Physico-Chimica Sinica, ;2000, 16(01): 9-14. doi: 10.3866/PKU.WHXB20000103 shu

Correlation between Liquid Structure and the Chemical Short-range Order of Al-Fe-Ce Amorphous Alloy

1.
College of Materials Science and Engineering,Shandong University of Technology,Jinnan 250061

Received Date: 5 April 1999
Available Online: 15 January 2000

The liquid structures of Al_0.9Fe_0.1 and Al_0.9Fe_0.05Ce_0.05 alloys and the microstructure of the Al_0.9Fe_0.05Ce_0.05 amorphous alloy have been studied by X-ray diffraction (XRD), and the crystallization behavior of the amorphous alloy has been investigated by differential scanning calorimetry (DSC). The distinct prepeaks have been found from the structure factors of the liquid and amorphous alloys. The structural size of chemical short-range order (CSRO) corresponding to the prepeak increases with decreasing temperature, but its structural unit size remains constant. The addition of Ce can increase the structural size of CSRO and its unit size, and improve the interaction between atoms, so it is helpful to the Al-based glass formability. The structural unit corresponding to the prepeak is an icosahedral quasicrystalline structure with a Fe atom as the interstitial atom, and this structure has already formed in the liquid alloy and can be reserved in the amorphous alloy.
- Al-Fe-Ce amorphous alloy,
- Prepeak,
- Chemical short-range order,
- Structure factor
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