[en] The possibility of obtaining diffusion coatings from a number of metals (Si, Pt, Cr, Ti, Ni, W, V, Nb, Co) on the molybdenum alloy TsM6 with the aid of isothermal transfer of the diffusant in molten calcium has been investigated, as well as the composition, structure, and protective properties of the coatings in an oxidizing medium at a temperature of 800-1000 deg C. It is shown that in all the investigated systems the transfer of the coating material is coupled with the transfer of the coating metal impurities to the TsM6 alloy. As a result the structure of the coatings is a solid solution based on the diffusant with a different content of the carbide phase. It is established that the highest heat resistance is shown by Pt, which is followed by coatings of Ti, Si, Ni and V. The kinetic dependences of the oxidation process are obtained

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[en] A possibility of producing diffusion heat-resistant coatings on the 5VMTs niobium alloy has been investigated. Coating heat-resistance was investigated in the air at 800-1100 deg C. Given are brief characteristics of diffusion coatings produced. It is shown, that the Re and V coatings have satisfactory protective properties

[en] The investigations have been made into the state of internal surface of steel type 12Kh18N10T cooling loop, filled with easily fusible coolant on gallium base. Geometrical distortions of channels have been revealed resulted from metal dissolution and formation of intermetallic compounds after three year operation at temperatures not exceeding 350 K. Electrotransport and melt impurities are shown to be the main factors in intermetallic compounds formation