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Phases in the crystallization process of zr_(65)al_(7.5)ni_(10)cu_(17.5)metallic glass

Rare Metals 2003年第1期22卷 33-41页

作者： LEIYi DONGChuan HEIZukun MoniqueCalvo－Dahlborg Jean－MarieDuboi DepartmentofMaterialsEngineering DalianUniversityofTechnologyDalian116024China InstituteofMaterial＆Technology DalianMaritimeUniversityDalian116024China LaboratoryofScienceandEngineeringofMaterials

The crystallization process of metallic glass zr_(65)al_(7.5)ni_(10)Gu_(17.5)(atom fraction in percent) were studied by transmission electron microscopy and X-ray *** stages of crystallization process, which are indicated by the two exothermic peaks in thedifferential scanning calorimetry diagram, were studied separately. It is found that the phases inthe various stage of the crystallization are different. In the first stage, it consists mainly oftI-cuzr_2 and tP-al_2zr_3 phases, between which a definite orientation relationship is found. Whilein the second stage, in addition to the above phases, phase hP^2-al_2nizr_6 and phase hP^3-alpha-zrappear, between which another orientation relationship is also found. At the same time, a comparisonis made based on the study of the phases exist in the arc-melted master ingot. The latticeparameters of the identified phases were determined and some interesting similarities were *** to these similarities, all the phases were classified into two groups. The first is: oB,tI-cuzr_2 and hP^3-alpha-zr; the other is: hP^2, tP-al_2nizr_3 and hP^1-al_2nizr_6. Therelationships between phases in these two groups were investigated and the probable reasons that mayresult in these relationships were discussed.

关键词： metallic materials bulk metallic glass crystallization zr-al-cu-ni transmission electron microscopy

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