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机构地区:[1]聊城师范学院物理系,山东聊城252059 [2]山东工业大学材料学院,山东济南250061 [3]山东省沂水县职业技术培训中心
出 处:《聊城师院学报(自然科学版)》2001年第1期43-45,51,共4页Journal of Liaocheng Teachers University(Natural Science Edition)
摘 要:由 Miedema半经验公式计算的 Fe/Dy二元系自由能图 ,及退火时 Fe/Dy非晶多层膜晶化过程的 XRD结果得出 :多层膜晶化受热力学和动力学两种因素控制 ,Fe,Dy晶态自由能低于初始非晶态提供了晶化的驱动力 。The free energy diagram of Fe/Dy systems is calculated by means of Miedema's semiempirical theory and the crystallization of multilayers with an amorphous microstructure is investigated by XRD during annealing.It is shown that crystallizing reaction of the amorphous films is controlled by thermodynamic and kinetic conditions.The free energy of crystalline Fe/Dy films is smaller than that of amorphous ones,which supplied driving force for the crystallization.Evolution of phase is determined by the free energy barrier and radius of the critically sized nucleus in some phase for Fe/Dy system
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