The data on numerical modeling of the temperature fields and phase transformations taking place in the surface layer of silumin irradiated with an intensive electron beam are presented. A comparative analysis revealed a good qualitative and quantitative agreement between the results of thermal calculations and structural-phase investigations performed on silumin irradiated with electron beams under varied electronbeam densities and pulse durations.

Possible advantages of amorphous manganese dioxide as a cathode material for application in the electrochemical power sources are briefly outlined. A synthetic routine enabling one to produce amorphous manganese oxide from aqueous solutions is described. Preliminary galvanostatic tests reveal better performance of this material in coin-type cells with lithium anodes, if compared with conventional electrolytic manganese dioxide. Cycling studies demonstrate an ability of amorphous manganese oxide to reversibly form compounds with lithium.

It has been shown that electron beam treatment of silumin is accompanied by the formation of multilayer submicro-and nanocrystalline structure and result in increasing the microhardness of the surface layer (towards the core) is ~ 1.5 times up to 2 GPa. Investigation of cross-sections of the samples also showed an increase of microhardness of the surface layers up to 50 μm and 70 μm under the best conditions of irradiation on "GEZA-1" setup and "SOLO" setup respectively.

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