• Y Zhen

      Articles written in Bulletin of Materials Science

    • Self-heating effect induced by ion bombardment on polycrystalline Al surface nanostructures evolution

      H Wang Y Zhen H Wjiang J T Liu

      More Details Abstract Fulltext PDF

      We studied the self-heating effect during ion bombardment process on polycrystalline Al foils. An anisotropic surface morphology evolution has been observed. The adjacent peaks’ fusion along the direction perpendicular to the ion beam projection smoothen the surface. Fusion along the parallel direction has been suppressed due to Ar+ ion bombardment. It attributes to the result of the competition between the isotropic thermal effect, due to the self-heating effect by energy exchange between incident ions and Al surface, and the suppression by continuous ion bombardment with a certain incident angle. Varying the incident ion beam angle with the angular range 32° < 𝜃 < 82°, the ripple wave vector, 𝜆, is found to be parallel to the ion beam direction, whereas for 𝜃 > 82° , 𝜆 is perpendicular to the beam direction. The critical angle, 𝜃c, is close to 82°, which is different from Bradley and Harper’s prediction and attributes to the self-heating effect.

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    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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