离子辐照诱导相变的热力学和动力学

M. Nastasi, J.W. Mayer
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引用次数: 82

摘要

综述了离子辐照诱导金属间化合物相变的热力学和动力学方面的研究进展。讨论了为这种转变提供热力学驱动力的不同机制。受辐照材料的自由能可以通过产生空位-间隙缺陷、反位缺陷和位错等晶格损伤的积累而逐渐提高到亚稳态以上,或者通过在碰撞级联中形成热尖峰而迅速提高。辐照材料的最终状态最终取决于其向低能亚稳态和平衡态转变过程中的动力学约束。
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Thermodynamics and kinetics of phase transformations induced by ion irradiation

The thermodynamic and kinetic aspects of ion-irradiation-induced phase transformations in intermetallic compounds are reviewed. The different mechanisms for supplying the thermodynamic driving force for such transformations are discussed. The free energy of an irradiated material can be gradually elevated above that of a metastable state by the accumulation of lattice damage through the production of vacancy—interstitial defects, anti-site defects, and dislocations, or quickly elevated by the formation of a thermal spike in the collision cascade. The final state of the irradiated material will ultimately be determined by kinetic constraints in its transformation to lower-energy metastable and equilibrium states.

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