Irradiation effects in surface layers of aluminium alloys and austenitic steels
The regularities and features of physical processes (blistering, sputtering, radiation-induced segregation and radiation-intensified sublimation), occurring in surface-adjacent layers of aluminium alloys and austenitic steels under the action of the fluxes of accelerated charged ions and electrons are considered.
Features of formation and migration of radiation-induced defects in carbon nanotubes (CNT) and nanostructured materials are examined. The main methods and software tools used for the simulating nanomaterial structure and space factors are described. The results of mathematical simulation are presented.
It has been shown that the sputtering stability of Al-Li alloys under bombardment by 0,5 keV neon ions was 3 times higher than that of Al.
The collection contains papers presented at the 11 th International Conference "Interaction of radiation with solids" (23-25 September 2015, Minsk) and covers the following topics: processes of interaction of radiation with solids, radiation effects in solids, beam techniques the formation of nanomaterials and nanostructures, the modification of the properties of materials, structure and properties of coatings, Equipment for radiation technologies.
Addressed to researchers and students of natural faculties.
The collection contains papers presented at the 10 th International Conference "Interaction of radiation with solids" (24-27 September 2013, Minsk) and covers the following topics: processes of interaction of radiation with solids, radiation effects in solids, the interaction of the plasma with the surface modification of materials properties, structure and properties of coatings, Equipment for radiation technologies. Addressed to researchers and students of natural faculties.
The combined Electro-Thermo-Rad models were developed for SPICE simulation of hardened SOI/SOS CMOS ICs for aero-space applications. They account for thermal (low, high temperature, selfheating) and radiation effects (total dose, particles fluence, single heavy particles, transient ionizing radiation effects) in SPICE model of MOSFET fabricated with SOI/SOS semiconductor technologies. The models were built using macromodeling approach, standard SPICE models for MOSFETs (BSIMSOI or EKV) and model parameters dependences on temperature and radiation factors. Combined account for radiation and thermal factors in SPICE model are described for the mentioned radiation factors. The main emphasis is on combined account for TID and temperature effects in the developed model. Some examples of the Electro-Thermo-Rad models application for combined simulation of radiation and thermal effects are presented.
Superplastic deformation behaviour of two aluminium-based AA7XXX type alloys with Sc and Zr additives distinguished by the presence and absence of coarse eutectic Al9FeNi particles are compared. An alloy with Al9FeNi particles exhibits high strain rate superplasticity at constant strain rate range of 5!10"3–8!10"2 s"1 with elongation of 915% due to extensive dynamic recrystallisation. Effective activation energy of superplastic deformation, surface relief of deformed samples, and grain structure evolution are analysed. Particle-depleted zones are found in the alloy with Al9FeNi particles at strains higher than 1.25.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.