Hydrogen diffusion in apatite with considering about the effect of fast diffusion path

Abstract

In previous studies, the diffusion coefficient of lattice diffusion in apatite may not have been determined due to the influences of fast diffusion pathway, which diffuse quickly through damages caused by polishing and defects in the crystal. Therefore, we reduced the damage on the apatite surface by using a vibration polishing method that reduces the effect of fast diffusion pathways. The hydrogen diffusion coefficients in apatite were obtained by secondary ion mass spectrometry after diffusion experiments using water vapor as a diffusion source. Those results suggest that the influence of the fast diffusion pathway could be reduced in this study. In this presentation, the newly obtained hydrogen diffusion coefficients will be used to discuss the diffusion mechanism.