  The diffusive evolution has been studied of gas-filled pore has in a bounded
particle in gas media. The nonlinear equation set, describing the behaviour of
gas-filled pore on bounded particle is obtained. Asymptotic modes are
considered for evolution of small and large pores. Analytical solutions are
obtained in asymptotic modes. The comparison is conducted of these solutions
with results of numerical solution of complete equation set. The characteristic
regularities of gas-filled pore behavior are found at arbitrary pore position
relative to matrix particle center.
