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Article
Modification of Working Fluids with Fine Carbon Particles in Metal Cutting
The addition of fine carbon particles to working fluids of water–oil emulsion type is considered as a means of decreasing the final surface roughness in cutting. The effect of reducing the size of the oil drop...
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Article
Assessing the Economic Effectiveness of Additive Sheet Lamination
Methodological aspects of assessing the economic efficiency of an additive manufacturing technology are discussed; specifically, the production of metal components by additive sheet lamination is considered. A...
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Article
Dominant factors of the laser gettering of silicon wafers
The laser gettering of silicon wafers is experimentally investigated. The typical gettering parameters are considered. The surfaces of laser-treated silicon wafers are investigated by microscopy. When studying...
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Article
Laws governing vibrating feeding of finely dispersed powder into a laser sintering zone
A vibrating powder feeder that makes it possible to deposit powder in a laser sintering zone in a continuous flow or in discrete portions has been developed. The dependence of the rate of flow of the powder on...
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Article
Laws governing vibrating feeding of finely dispersed powder into a laser sintering zone
A vibrating powder feeder that makes it possible to deposit powder in a laser sintering zone in a continuous flow or in discrete portions has been developed. The dependence of the rate of flow of the powder on...
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Article
Optimization of the local crystallization processes of preparing chiral drugs in periodic crystallizers
The regularities of periodic processes of local crystallization of enantiomers and the kinetics of nucleation and growth of crystals are considered. The criteria for optimization of technological processes of ...
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Article
Selective laser sintering of single-phase powder Cr-V tool steel
Presented is positive experience from selective laser sintering (SLS) of cylindrical steel specimens (3.0% C, 3.0% Cr, 1.0% Si, 12.0% V, Fe balance) 30 mm long and 5 mm in diameter by rapid prototy**. It was...
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Chapter
Vibrational Control of Czochralski Crystal Growth
Axial low-frequency small-amplitude vibrations of a growing crystal can have a significant effect on the fluid dynamics and heat transfer in the melt and can enhance the structural perfection of crystals on a ...
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Article
Luminescence effects accompanying Ba(BrO3)2 ⋅ H2O crystallization from solution
Kinetics of the Ba(Br2O3)2 ⋅ H2O precipitation from aqueous solution and the accompanying luminescence effects are studied. Specific features of appearance of luminescence during grinding of Ba(Br2O3)2 ⋅ H2O crys...
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Article
Selective laser sintering of steel powders to obtain products based on SAPR-models
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Liquid-phase laser sintering based on Rapid Prototy** technology can be successfully used on powder steel 3...
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Article
Some principles for making graded materials
A brief survey is presented of research on making certain types of graded material that have not yet been widely used. In particular, attention is given to graded materials involving phase transitions, vitreou...
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Article
Kinetics of interparticle contact formation during the laser sintering of two-component powders
The kinetics of interparticle contacts formation during the liquid-phase sintering of unlike materials under the action of laser irradiation was investigated. Trios of particles arranged ...
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Article
Experimental investigation of the kinetics of regrou** and zonal isolation of particles in the laser sintering of a monolayer of one-component metallic powder
The laws of particle regrou** in the laser sintering of a one-component metallic powder were experimentally investigated. The main features of zonal isolation were studied. Spherical particles arranged in a ...
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Article
Selective laser sintering of compacted powders
The selective laser sintering of preliminarily compacted powders was investigated. Depths of sintering lower than those with freely poured powders were attained. This has a negative effec...
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Article
Experimental modeling of the joining of two superficially melted particles
The kinetics of surface melting and solidification of particles, and the joining of two superficially melted particles, were studied using model experiments. The experimental results confirmed the welding mech...
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Article
Formation of internal cavities in powder components using removable inserts, produced by selective laser layer sintering
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Article
Measurement of the absorption coefficient of freely poured one-component metallic powders and its change during laser sintering
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Article
Sheet glass broken by an electromagnet
A method is discussed in which a surface-nicked glass sheet is broken using the pull of an electromagnet which causes the sheet to bend together with a flexible magnetic circuit. In this way, the sheet can be ...
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Article
A porous water-absorbing material
A porous water-absorbing material compounded from quartz sand, borosilicate glass, and plaster was developed. It can be fabricated as is usually done in the manufacture of ceramic materials or by selective las...
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Article
Kinetics of formation of interparticle contacts in the laser sintering of single component metallic powders
The joining of two spherical particles of nickel alloy powder under the action of lager irradiation, and the lager sintering of thin layers of poured powder were investigated. It was determined that powder par...
