A Comparison of the Electron and Ion Irradiation Effects on the：在电子和离子束辐照效应的比较.pptVIP

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A Comparison of the Electron and Ion Irradiation Effects on the：在电子和离子束辐照效应的比较.ppt

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A Comparison of the Electron and Ion Irradiation Effects on the：在电子和离子束辐照效应的比较

A COMPARISON OF THE ELECTRON AND ION IRRADIATION EFFECTS ON THE STABILITY RANGE OF ORDERED STRUCTURES IN Ni4 Mo Outline Outline Evolution of order Outline Ordered States in Ni4 Mo Description of LRO and SRO structures Outline Outline Electron Irradiation Results Evolution of Order in Ni4Mo under electron Irradiation Outline Ion Irradiation Results Evolution of Order in Ni4Mo under ion Irradiation Evolution of Order in Ni4Mo under ion Irradiation Evolution of Order in Ni4Mo under ion Irradiation Evolution of order in Ni4Mo under ion Irradiation Loop size greater than 10 nm Cascade dynamics Comparison of electron and ion irradiation results Comparison between electron ion irradiation Conclusions Acknowledgments Dr. U.D. Kulkarni, BARC Prof. K. Urban, KFA, Jülich Prof. H. Wollenberger, HMI, Berlin Reaction kinetics model Kinetics: Rate of Change of point-defect concentrations (Vacancy, V, Interstitial, I) Radiation Effects in Solids Irradiation induced processes Stochastic treatment Stochastic treatment of ordering in Ni4Mo under electron irradiation Some examples of ordering transformation occurring at different irradiation temperatures for electron irradiation is shown in the next few slides. AT 170K gradual decay of LRO to CDO state. No SRO formation at intermediate stages of irradiation was noticed. AT 473 K, SRO intensity persists at the same value through out the irradiation. Examples of ordering transformation during nickel ion irradiation is shown in the next few slides. Gradual decay of LRO and SRO states to CDO during irradiation at room temperature. Decay of LRO and gradual development of SRO. The CDO state was not observed at any time during irradiation. After 0.1 dpa of dose, LRO is completely destroyed and SRO has evolved. i-SRO denotes initially in SRO state; i-LRO means initial state is LRO Net vacancy concentration and the substrate temperature decide the final state forming during ion irradiation. In the case of ion irradiation, the cascade size