Проблемные вопросы разработки стандартных образцов состава и свойств материалов авиационного назначения

Considered problematic issues of the development of reference materials (RMs) for aircraft industry. The focus is on the methods for choosing the RM chemical composition and metallographic structure, and the use of different technologies for their production with high intra- and between item homogeneity. Considered problematic issues of the RM program, shows the need to expand and optimize the range of RMs. The present work is performed within framework of the integrated research concept 2.1. "Fundamentally oriented research" ("Strategic concepts of development of materials and technologies for their processing for the period up to 2030").Рассмотрены проблемные вопросы разработки стандартных образцов авиационных материалов. Основное внимание уделено описанию способов решения проблемных вопросов, связанных с выбором композиции химического состава и использованием различных технологий для обеспечения высокой внутри- и межэкзем-плярной однородности материала стандартных образцов по химическому составу и металлографической структуре. Рассмотрены проблемные вопросы формирования программ выпуска стандартных образцов, показана необходимость расширения номенклатуры СО и ее оптимизации. Работа выполнена в рамках реализации комплексного научного направления 2.1. «Фундаментально-ориентированные исследования» («Стратегические направления развития материалов и технологий их переработки на период до 2030 года»

An Investigation of Products of (n, ƒ), (n, ɣ) and (ɣ, ƒ), (ɣ, xn, p) Reactions on Samples of Uranium and Bismuth using the Phasotron and LINAС-200 Accelerators at JINR: Experiments and Calculations

The paper presents the results of physical experiments with 238U and 209Bi samples at the Nuclotron, Phasotron and LINAC-200 accelerators of the Joint Institute for Nuclear Research, with the results processed using the FLUKA, GEANT4 and MCNP programs

Problematic issues of the development of reference materials of composition and properties for aircraft industry

Considered problematic issues of the development of reference materials (RMs) for aircraft industry. The focus is on the methods for choosing the RM chemical composition and metallographic structure, and the use of different technologies for their production with high intra- and between item homogeneity. Considered problematic issues of the RM program, shows the need to expand and optimize the range of RMs. The present work is performed within framework of the integrated research concept 2.1. "Fundamentally oriented research" ("Strategic concepts of development of materials and technologies for their processing for the period up to 2030")

Phosphatized bacteria from Cretaceous phosphorites of East-European Platform and Paleocene phosphorites of Morocco

Phosphatized bacteria of cocco-like structures up to about 3,5 pm have been found in low Cretaceous phosphorites of Egor'yevskoye deposit, East-European Platform, USSR, and in low Paleocene phosphorites of Ben Guérir deposit, Morocco. They occur as dispersed grains, solid mass, and stretched chains. Some of the phosphatized bacteria of Egor'yevskoye deposit have threadlike sprouts which are fastened to the substratum. The outer cover (capsule or cellular wall) and the inner part (protoplasm) of a bacteria cell are visible in the phosphatized bacteria of Ben Guerir deposit.Des formes bactériennes phosphatisées, rappelant des coccus, ont été trouvées dans des phosphorites du Crétacé inférieur du gisement de Egor'yevskoye de la Plate-forme d'Europe Orientale en U.R.S.S., ainsi que dans les phosphorites du Paléocène inférieur du gisement de Ben Guérir au Maroc. Leurs tailles atteignent 3,5 pm. Elles se présentent sous forme de grains dispersés ou d'amas ; à Ben Guérir elles forment des chaînes allongées. A Egor'yevskoye certaines de ces bactéries phosphatisées sont attachées au substratum par des filaments. A Ben Guérir il a été possible d'observer des détails de la structure des bactéries : membrane externe et protoplasme interne.Zaninu Yuri N., Letov Sergey V., Krasil'Nikova Natalia A., Mirtov Yuri V. Phosphatized bacteria from Cretaceous phosphorites of East-European Platform and Paleocene phosphorites of Morocco. In: Phosphorites. Sixth International Field-Workshop and Seminar on Phosphorites. I.G.C.P. 156. Maroc-Sénégal, oct.-nov. 1983. Strasbourg : Institut de Géologie – Université Louis-Pasteur, 1985. pp. 79-81. (Sciences Géologiques. Mémoire, 77