Greens tensor of a weakly anisotropic cubic crystal: Efficiency of point defect absorption by spherical pore

Abstract

Using the Lifshitz-Rozentsveig method, an improved expression for the Green tensor in the case of a weakly anisotropic cubic crystal has been derived. It contains a number of additional terms disregard previously. An expression for the energy of elastic interaction of a point defect with a gas-filled pore, which differs from its analogue (commonly used referring to Eshelby) by an additional factor in the radial part, has been derived. In the case of weak interaction (in comparison with thermal energy), a correction to the efficiency of point defect absorption by a gas-filled pore is obtained, which appears quadratic in the anisotropy parameter and negative. As a result, the pore exhibits preference for absorption of vacancies in comparison with absorption of interstitials.