The results of the modification of the atomic structure of the Pt surface after bombardment by accelerated beams of Ar<sup>+</sup> ions are presented. Field ion microscopy was used to study the irradiated ...The results of the modification of the atomic structure of the Pt surface after bombardment by accelerated beams of Ar<sup>+</sup> ions are presented. Field ion microscopy was used to study the irradiated surface on an atomic scale. From the analysis of the ion contrast of the atomically clean surface of platinum after bombardment with Ar<sup>+</sup>, a large number of radiation defects of various types were found. Individual vacancies, interstitial atoms, Frenkel pairs, depleted zones, nanoclusters of displaced atoms, etc. have been registered. It has been established that the depth of the near-surface volume of the irradiated metal with defects (except for zero-dimensional defects) is 1 - 1.5 nm for the bombardment regime: F = 10<sup>16</sup> ion/cm<sup>2</sup> and E = 30 keV.展开更多
Field ion microscopy was applied for uniaxial tension tests at cryogenic temperature.The plastic deformation of near damage-free submicron-sized metallic glass wires was found to remain shear band operation even the d...Field ion microscopy was applied for uniaxial tension tests at cryogenic temperature.The plastic deformation of near damage-free submicron-sized metallic glass wires was found to remain shear band operation even the diameter was less than 200 nm.The critical sample dimension for inhomogeneous-to-homogeneous transition may be overestimated before.展开更多
文摘The results of the modification of the atomic structure of the Pt surface after bombardment by accelerated beams of Ar<sup>+</sup> ions are presented. Field ion microscopy was used to study the irradiated surface on an atomic scale. From the analysis of the ion contrast of the atomically clean surface of platinum after bombardment with Ar<sup>+</sup>, a large number of radiation defects of various types were found. Individual vacancies, interstitial atoms, Frenkel pairs, depleted zones, nanoclusters of displaced atoms, etc. have been registered. It has been established that the depth of the near-surface volume of the irradiated metal with defects (except for zero-dimensional defects) is 1 - 1.5 nm for the bombardment regime: F = 10<sup>16</sup> ion/cm<sup>2</sup> and E = 30 keV.
基金Item Sponsored by Research Foundation of Chongqing University of Science&Technology,the project No.isCK2011B18
文摘Field ion microscopy was applied for uniaxial tension tests at cryogenic temperature.The plastic deformation of near damage-free submicron-sized metallic glass wires was found to remain shear band operation even the diameter was less than 200 nm.The critical sample dimension for inhomogeneous-to-homogeneous transition may be overestimated before.
