Diffusion mass transfer in ionic materials under intense electron irradiation

[摘要] The results of studies on the impact of an electron beam with the energy of 1-2 MeV on diffusion processes in materials with ionic bonds are presented in the paper. Used electron beam intensity is allowed to provide heating of the material to temperatures of 1600 K. Diffusion of Na, Mg, Al ions into single crystals KBr in the temperature range 573-883 K, Al ions in the NiO-AlO system at 1373-1573 K, was studied. Diffusion annealing carried out under thermal and radiation-thermal heating of the samples. Then diffusion coefficients were determined. It was found stimulating action of irradiation on diffusion processes of Mg, Al ions in Kbr and Al ions in the NiO-Al2O3system, which consists in increasing the diffusion coefficients at radiation-thermal annealing. The observed effect is achieved by increasing the effective rate of diffusion jumps.

[发布机构] Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the RAS, Novosibirsk, Russia^1;National Research Tomsk Polytechnic University, Tomsk, Russia^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Diffusion annealing;Diffusion process;Effective rates;Electron beam intensity;Stimulating action;Temperature range;Thermal heating;Thermal-annealing