[en] This volume includes the papers of the international conference on radiation materials in Alushta, Ukraine in May 1990. The main topics are: basic research in radiation damage physics, a study of the structural materials for reactor cores; irradiation effect on reactor vessel, fuel, super- and semiconductor materials; investigation damage research methods

[en] Influence of fast neutrons from reactor on Kh18N10T and Kh16N11M3T austenitic steels penetrability for hydrogen was studied. These steels are candidates as construction materials for thermonuclear reactors and such parameters of hydrogen transfer as penetrability, diffusion, solubility were investigated in them during and after irradiation in reactor. 3 refs.; 3 figs. (author)

[en] The kinetics of V₂O₅ and MoO₃ monocrystal structural changes has been investigated under electron irradiation with various energies (80-1000 keV). Irradiation with various energies and/or in different crystallographic directions results in formation of various phases. The oxygen vacancies concentration-dependent phases diagram has been built under different irradiation conditions with allowance for their dipole-dipole interaction. 7 refs.; 5 figs

[en] Sputtering yields of graphite, niobium and niobium carbide by neutron irradiation were obtained by computer simulation. It is shown that the niobium sputtering yield in niobium carbide is by factors 4 to 10 less than that in pure niobium (under the same initial conditions). It is also found that niobium carbide irradiation by fast neutrons may give rise to sputtering (∼40%) carbon atoms with a high average energy E∼>100 eV. 8 refs.; 2 figs. (author)

[en] Radiation swelling and structure of austenitic steels Kh16Ni15M3 and Kh12Ni30M3 doped by Ti,Al,Si was studied after irradiation in BN-600 reactor up to the damaging dose 60 dpa at 480-500⁰C. It was shown that the swelling after irradiation was considerably less in Kh16 steel with 1%Ti comparing with steels without Ti and with 0.3 mass%Ti. 6 refs.; 1 fig.; 2 tabs. (author)

[en] Hydrogen permeation in steel type 12Kh18N10T in reactor-radiation with neutron - and gamma-quantum density flux 3x10¹⁰nxcm^-2xc^-1 and 10⁹cm^-2xc^-1 correspondently with summarized radiation dose 5x10¹'5cm^-2 in temperature range 673-973 K, with hydrogen pressure 0,3 MPa is studied. Description of technique and test plant is given and the achieved results are discussed here. The remarkable unreversible increase of hydrogen permeation through steel and some reduction of energy activation under reactor irradiation was found. 7 refs.; 4 figs. (author)

[en] Results of studies macro- and microstructures of centrifugal castings and distributions of inclusions and alloying elements and impurities are presented. It was established that distribution of components of steels in castings is uniform. The macro structure is band and the microstructure is dendritic. Principal feature of centrifugal castings is redistribution of inclusions, main part of casting being free from conclusions. 1 refs.; 4 figs.; 3 tabs. (author)

[en] Computer simulation was used to investigate the evolution of the spot emitting scattered particles on amorphous materials TaC and Ni irradiated by a Ne⁺ ion beams with an energy ranging from 100 eV to 10 keV and angle of incidence α=0⁰. It is shown that the growth rate of the spot falls and the entirely ceases with the incident ion energy increase above E_ic (E_ic is the critical energy). This is explained by predominant incident ion energy dissipation inwards the target material rather than in the direction along the subsurface layer. 2 refs.; 4 figs

[en] Crystal-chemical aspects of molecular (atomic) volume measured by X-ray method are considered. The volume increase in diamond, beryllium oxide and boron carbide up to 16% is accompanied by appearance of diffusive maximums at X-ray diagrams. There are structural transitions not accompanied by diffraction lines broadening with increase or decrease of molecular volume in double oxide compounds Gd₂O₃ with aluminium, titanium, molybdenum oxides. Vital factor in volume change is establishment of new relations among atoms in the local lattice regions or in the whole crystal volume. 4 refs.; 6 figs. (author)

[en] The results are presented of the investigation into the thermo radiation diffusion of copper from a galvanic coating into the depths of a titanium base layer made of two-phase α+β-alloys (BT6 and BT23 types) under the effect of a 15-20 KeV electron beam both in the continuous and pulse modes of treatment with a frequency of 5 Hz. It is found the effect of electron current results in the change in the surface physical state, i.e. the change in the energy of an atomic boundary layer, formation of vacancies and dislocations lowering the activation energy of diffusion processes. The results obtained are explained from the position of irreversible processes with allowance for the influence and super-imposing of elementary fluxes. 7 refs