Institute of Physics of Materials AS CR, v. v. i. > Projects > Diffusion of constituents in Mg-based advanced alloys and composites

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Diffusion of constituents in Mg-based advanced alloys and composites

Anotace

The aim of the present project is to obtain radiotracer diffusion coefficients in four commercial alloys. The diffusion coefficients of 67Ga, 114mIn, 54Mn, 124Sb and 65Zn will be measured in AZ91 alloy (Mg-Al-Zn-Mn) and in composite AZ91+Saffil, the diffusion coefficients of 110mAg, 139Ce, 88Y and 65Zn will be measured in QE22 alloy (Mg-Ag-RE-Zr) and in composite QE22+Saffil. Measurements carried out at several temperatures will give activation energy and frequency factors of lattice diffusion. Experiments done with alloys of equal chemical composition and similar microstructure, but once with and once without short-fibers reinforcement will provide an assessment of diffusivities along the interphase fiber/matrix boundaries. The result obtained may be utilized for optimization of technological parameters in fabrication ad/or in thermal treatment of alloys under study in technical practice.