Small droplets 10-800 mu m in diameter and fine fibers with diameter 10-350 mu m and length 2-30 mm and Al-Cu-Fe alloy were undercooled and solidified by containerless processing during free fall in a drop tribe either in vacuum or at different pressures of purified helium gas. The phases in the samples solidified from the undercooled melt were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A CsCl-type Al(CuFe) cubic phase, Al13Fe4 and Al-Cu-Fe icosahedral phase and Al-Cu-Fe ternary amorphous phase were found depending on the size and shape of samples. A comprehensive description of phase formation in undercooled Al-Cu-Fe melts is developed in terms of nucleation,crystal growth, and transformation kinetics on the basis of classical theories.
部门归属
chinese acad sci,int ctr mat phys,shenyang,peoples r china. inst phys,beijing,peoples r china.;zhang, fx (reprint author), chinese acad sci,inst phys,beijing 100080,peoples r china
F. X. Zhang,W. K. Wang. Phase formation behavior in undercooled quasicrystal-forming Al-Cu-Fe alloy melts[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1996,205(1-2):214-220.
APA
F. X. Zhang,&W. K. Wang.(1996).Phase formation behavior in undercooled quasicrystal-forming Al-Cu-Fe alloy melts.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,205(1-2),214-220.
MLA
F. X. Zhang,et al."Phase formation behavior in undercooled quasicrystal-forming Al-Cu-Fe alloy melts".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 205.1-2(1996):214-220.
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