Abstract
The expediency of development of one of the newest highly effective radiation-protective materials—layered composites of “light metal/heavy metal” type is substantiated. The characteristics of the internal architecture of composites of Al/Pb type made by consecutive application of vacuum and normal atmospheric rolling are adduced. The differences between the radioisotope and accelerating techniques of experimental testing of radiation-protective properties of materials are described. The results of the testing of composites and the influence of their structure on radiation-protective properties of the investigated materials are characterized. It is shown that the radiation-protective efficiency of composites certain structures may be 30% - 40% higher than the aluminum. This gives the opportunity to reduce the weight of radiation-protective structure at preservation of effectiveness of protection at aluminum level, or to increase the effectiveness of protection at constant weight of this structure.
Highlights
One of the challenges faced by developers of new generations of spacecrafts (SC) is to increase the level of theirHow to cite this paper: Bilous, V., Borysenko, V., Voyevodin, V., Didenko, S., Ilchenko, M., Rybka, O., Kuznetsov, O. and Plisak, Y. (2014) Layered Metal Composites: Newest Generation of Radiation-Protective Materials
Radiation-protective efficiency (RPE) of layered composites and their homogeneous components was evaluated on the degree of decrease of density of a stream of electrons and gamma-rays that have passed through the tested sample
The value of this density was measured using a detector of ionizing radiation (IR) in the form of crystal of semiconductor compound CdZnTe connected to the measuring system
Summary
One of the challenges faced by developers of new generations of spacecrafts (SC) is to increase the level of their. Due to its specific constitution, this structure is a kind of a trap for photons and has a higher protective properties in comparison with homogeneous materials of which it consists This is a consequence of the fact that scattering and absorption mechanisms at the atomic level inherent in homogeneous materials, in heterogeneous structures are summarized with additional other mechanisms. Results of the analytical research of the evolution of the characteristics of photon flux of x-ray and gammaradiation [2] and high-energy electrons [3], which occur in layered structures, showed that the criterion of the best materials for multilayer structures is the maximum difference of the coefficients of reflection of the neighboring layers To this criterion correspond light and heavy metals with small and big Z, respectively. Reducing weight large-tonnage apparatus at 100...200 kg will significantly reduce its cost and/or give possibility to increase the weight of the payload to perform the main functional purpose of the device
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