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Article
Current state and prospects of high-speed electron-beam evaporation and subsequent vacuum condensation of metals and nonmetals to produce electric contacts and electrodes
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 mac...
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Article
Microstructural evolution of Cr–Cu composites in liquid-phase sintering
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 u...
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Article
Analyzing the quality of grinding and mixing of copper and chromium powders in a new-type mill
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 mat...
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Article
Relationship between composition, structure, and mechanical properties of a condensed composite of copper–tungsten system
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...
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Article
Effect of composition and heat treatment on the structure and properties of condensed composites of the Cu – W system
Changes in the structure, electrical conduction, mechanical characteristics, and special features of fracture of a copper-tungsten composite obtained by the method of electron-beam evaporation-condensation are...
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Article
Effect of composition and process factors on the structure, mechanical properties, and fracture behavior of a composite material of the copper – chromium system
The structure, hardness, strength, ductility, and special features of fracture in a temperature range of 20–900°C are studied as a function of the chromium content and of the mode of heat treatment for a Cu – ...
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Article
Effect of deformation processing on the properties of Cu–50% Cr composite
The paper examines the structure, density, resistivity, and mechanical properties of Cu–50 wt.% Cr powder composite after liquid-phase sintering at 1200°C in hydrogen and subsequent deformation processing: add...
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Article
Structure formation during sintering in the presence of a liquid phase in Cr-Cu-metal of the iron family systems. II. Systems Cr-Cu-Ni(Co, Fe)
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...
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Article
Structuring on sintering in the presence of liquid phase in Cr-Cu-iron group metal systems. I. Cr-Cu system
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. T...
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Article
The Scientific Paths Laid down by I. N. Frantsevich are Alive and Develo**
Many years ago Ivan Nikitich Frantsevich foresaw and founded the most important trends of contemporary materials science as the union of science and technology. The successful development of these trends by Fr...
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Article
Morphology of nickel powder contactly precipitated on magnesium in aqueous solutions
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...
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Article
Morphology of nickel powder contactly precipitated on magnesium in aqueous solutions
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...
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Article
Morphology of Electrochemically Nickel-Plated Tungsten Powder Made of Substandard Wire
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Article
Copper powder rolling technology (review)
Published data are analyzed for the rolling technology of copper powder. It is established that production parameters for manufacturing copper rolled product are predetermined by the preparation method, chemic...
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Article
Texture formation in the cold rolling of pseudo-alloys
The formation of metallographic and crystallographic textures and the properties of the composite materials W - Cu, W - Ni - Fe, and Ag - Ni with a metal matrix were studied after 5–85% squcezing by rolling. I...
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Article
Contact interaction, structure, and properties of W(Mo, Cr)-Cu composites with additives
The results of research on the effect of additives on the adhesive characteristics and phase-boundary formation in W(Mo, Cr)-Cu systems are summarized. The distinctive features of structure formation and the p...
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Article
Surface tension nonuniformity effect on fluid distribution in a porous body
Surface forces nonuniformity within the volume of a capillary system for a given structure has been examined in terms of its effect on a wetting fluid distribution. This approach enables the distribution for a...
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Article
Capillary forces and the criterion of stability of the liquid seal between spherical particles
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Article
Nonuniformity of distribution of the basic elements and impurities in W-Ni-Fe powder alloys
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Article
Special features of the wear of tungsten-copper electric contacts in air and in oil
The predominant effect on electric erosion in the first switching cycles of light currents in air is exerted by the state of the surface of the working layer of contacts (increased content of copper, its defor...
