Rapid Fabrication and Characterization of Micropores on Pure Nickel Surface by High-Current Pulsed Electron Beams Irradiation

Abstract

The Mechanism of Micropores Formed on the Surface of Polycrystalline Pure Nickel under High-current Pulsed Electron Beam (HCPEB) Irradiation Is Explained. it Is Discovered that Dispersed Micropores with Sizes of 0.1-2.0 µm on the Irradiated Surface of Pure Nickel Can Be Successfully Fabricated after HCPEB Irradiation. the Dominant Formation Mechanism of the Surface Micropores Should Be Attributed to the Formation of Supersaturation Vacancies within the near Surface during the HCPEB Irradiation and the Migration of Vacancies along Grain Boundaries and/or Dislocations towards the Irradiated Surface. it Is Expected that the HCPEB Technique Will Become a New Method for the Rapid Synthesis of Surface Porous Materials.