3-7 July 2017
Africa/Johannesburg timezone

SHI irradiation enhanced diffusion of silver implanted into polycrystalline SiC

4 Jul 2017, 17:10
1h 50m
3rd and 4th floor passages (Engineering Building 51)

3rd and 4th floor passages

Engineering Building 51

Board: 44
Poster Presentation Track F - Applied Physics Poster Session 1

Speaker

Mr Hesham Abdelbagi Ali Abdelbagi (University of Pretoria)

Description

Migration behavior of silver (Ag) ions implanted into polycrystalline CVD-SiC was investigated by Rutherford backscattering spectrometry (RBS), Raman spectroscopy and scanning electron microscopy. Silver ions of 360 keV were implanted into CVD-SiC to a fluence of 2×1016 cm-2 at room temperature. Some of implanted samples were irradiated with xenon (Xe) ions of 167 MeV to a fluence of 3.4×1014 cm-2 and 8.4×1014 cm-2 at room temperature. Both the as-implanted and implanted then irradiated samples were isochronal annealed at temperatures ranging from 1100 oC to 1400 oC in steps of 100 oC for 10 h. Raman results of the as-implanted samples showed that implantation of Ag resulted in the amorphisation of SiC, while irradiation of the as-implanted samples with Xe ions caused some recrystallization. Recrystallization was already taking place after annealing at 1100 oC in both samples. After annealing at 1400 oC, un-irradiated samples were fully recrystallized, while the irradiated samples were still not fully recrystallized. Ag started to move towards the surface without broadening after annealing at 1100 oC in the un-irradiated samples, while no movement of Ag was detected in the irradiated samples up 1200 oC. Diffusion of Ag was detected after annealing at 1300 oC for the irradiated samples and no diffusion was detected in the un-irradiated samples up to 1400 oC. Therefore, SHI irradiation somehow enhanced diffusion of Ag.

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

PhD

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

yes

Primary author

Mr Hesham Abdelbagi Ali Abdelbagi (University of Pretoria)

Co-authors

Prof. Johan Malherbe (University of Pretoria) Dr Thulani Hlatshwayo (University of Pretoria)

Presentation Materials

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