Zobrazeno 1 - 10
of 57
pro vyhledávání: '"R. A. Minakova"'
Publikováno v:
Powder Metallurgy and Metal Ceramics. 52:228-236
The paper describes the structural features and properties of condensed composites based on copper and refractory metals (W, Mo, Cr). These condensed materials have a lamellar structure with a hierarchy of macro-, micro-, and submicron levels. In the
Publikováno v:
Powder Metallurgy and Metal Ceramics. 52:20-31
The paper examines the effect of temperature and volume fraction of refractory particles on the kinetics of their growth during liquid-phase sintering of Cr–Cu composites in the temperature range 1150–1350°C under a vacuum of (2–4)∙10–3 Pa
Publikováno v:
Powder Metallurgy and Metal Ceramics. 51:137-141
The potential use of a new-type mill developed at the Frantsevich Institute for Problems of Materials Science to produce copper and chromium powder mixtures intended for the manufacture of electrical-grade materials is studied. The mill ensures mecha
Autor:
V. V. Kharchenko, Ilija Mamuzić, M. P. Rudnyts’kyi, M. I. Grechanyuk, V. V. Bukhanovs’kyi, R. V. Minakova
Publikováno v:
Strength of Materials. 43:426-437
For a copper–tungsten microlayered composite material for electrical contact applications, which is prepared by electron-beam evaporation- condensation, the changes in its structure, conductivity, hardness, and mechanical properties in tension at r
Publikováno v:
Science of Sintering, Vol 39, Iss 3, Pp 249-258 (2007)
Features of the microstructure formation of Cr-Cu composites under impregnation followed by liquid phase sintering of reduced and e lectrolytic chromium powders at 1200 oC in a vacuum of (2-4) ·10 -3 Pa have been studied. The refractory component pa
Publikováno v:
Powder Metallurgy and Metal Ceramics. 45:311-316
Features of structure and phase formation in Cr-Cu-Ni(Co, Fe) systems during liquid-phase sintering in a vacuum of (2–4) · 10−3 Pa at 1200 and 1270°C are studied. It is shown that with introduction of elements of the iron family into molten cop
Publikováno v:
Journal of Applied Spectroscopy. 73:426-431
We have used optical spectroscopy to study the radial temperature profiles for an electric arc plasma between silver electrodes and electrodes made from composite materials based on silver (Ag-CdO). We studied the structural changes in the working la
Publikováno v:
Powder Metallurgy and Metal Ceramics. 45:215-220
Structuring has been examined for Cr-Cu composites under conditions of impregnation and subsequent liquid-phase sintering at 1200°C in a vacuum of (2–4) · 10−3 Pa with reduced and electrolytic chromium powders. The size distribution for the par
Publikováno v:
Materials Science. 40:428-432
We analyze the morphology of nickel powders obtained by contact precipitation on magnesium and establish the hierarchy of the shape of particles. We show that in the concentration range of nickel salt of 0.2–2.0 M and at the temperature range 20–
Publikováno v:
Chemistry of Heterocyclic Compounds. 40:456-459
The H-complex-forming reaction of naphthalimide derivatives with phenol has been investigated by IR spectroscopy. It was shown that for the majority of compounds studied the carbonyl group is the main center of basicity. In the case of amino-substitu