PRECISION CASTING INTO DISPOSABLE CERAMIC MOLD – A HIGH EFFICIENCY METHOD OF PRODUCTION OF CASTINGS OF IRREGULAR SHAPE

The article shows the advantages and disadvantages of precision casting into disposable ceramic molds. The high quality shaped castings produced by modernized ceramic molding process are proved the reliability and prospects of this advanced technology

РАЗЛИЧНЫЕ ТИПЫ СТРУКТУР АНТИПРОЖИГАЕМЫХ ПЕРЕМЫЧЕК ДЛЯ ПРОГРАММИРУЕМЫХ ПОЛЬЗОВАТЕЛЕМ ВЕНТИЛЬНЫХ МАТРИЦ И ПОСТОЯННЫХ ЗАПОМИНАЮЩИХ УСТРОЙСТВ

The use of anti-fuses as programmable elements is becoming popular in field programmable gate arrays and programmable read-only memories. The characteristics of various structures of anti-fuses and compromise between performance and reliability will be discussed in this paper.Использование антипрожигаемых перемычек в качестве программируемых элементов становится все более популярным в программируемых пользователем вентильных матрицах и программируемых постоянных запоминающих устройствах. В работе обсуждаются характеристики различных структур антипрожигаемых перемычек, а также компромисс между производительностью и надежностью

Carrier transport in porous-SiNic-Si nanostructures

In the present paper we have studied the peculiarities of carrier transport properties of nanoheterostructures containing silicon substrate covered with porous silicon layer, where pores were either filled or non-filled with ferromagnetic Ni clusters.We have carried out DC conductivity experiments as a function of temperature (ranging from 2 to 300 K) and porosity of porous silicon layer (between 30% and 70%). Presence of a surface layer with high resistance on the porous silicon top and its role in nanoheterostructure formation was revealed. It was shown that specific electrochemical kinetics of Ni deposition into porous silicon significantly influences resultant nanostructure resistance and high temperature conductance activation energy

All silicon passive addressed micro LED displays with nano-porous Si/ITO-free nanomesh layers as light emitting pixels

In this paper we will concentrate on the usage of novel technologies and nanostructured materials to fabricate low cost high efficient micro LED displays with unique features. Possible areas of application will be discussed as well

Features of technology for manufacturing cast toolbills from rapid-cutting steel R6M5

The article presents the results of computer simulation of the crystallization of castings from high-speed steel R6M5, intended for the manufacture of cutters and gear shaping tools in the conditions of OJSC “Minsk Gear Plant”. The use of modeling made it possible to optimize the gating system, reduce this volume of the profitable part by 30–35 % and increase the yield of suitable casting, which made it possible to reduce the consumption of expensive alloying elements introduced into the melt to compensate for burnout during melting and casting

Analysis of modern composite materials used in the manufacture of model kits for small-scale foundry production, obtained using bonding technology

The article presents modern data on the materials used to create model kits, the method of their installation for use on any foundries, specializing in the repair and creation of castings by experimental or small-scale batches. The analysis of the used materials, adhesive compositions for their fastening, as well as economic indicators of the costs necessary for their production was made. The properties of glued joints used for manufacturing components of model kits from plastics and its combinations with metal parts are shown

Various anti-fuse structures for field programmable gate arrays and programmable read-only memories

The use of anti-fuses as programmable elements is becoming popular in field programmable gate arrays and programmable read-only memories. The characteristics of various structures of anti-fuses and compromise between performance and reliability will be discussed in this paper

USE OF TECHNOLOGY OF PRECISION CASTING INTO DISPOSABLE CERAMIC MOLD FOR PRODUCTION OF SHAPED CASTINGS AND OF CASTINGS WITH THE HIGHER PERFORMANCE REQUIREMENTS

Through the example of production of specific castings the effectiveness of the precision ceramic molding technology for the production of shaped castings and castings with the higher performance requirements has been demonstrated

Fabrication and properties of porous silicon – iron magnetic nanocomposites

Porous silicon (PS)/Fe nanocomposites were fabricated by electrochemical deposition of Fe into pores of mesoporous silicon template under the stationary galvanostatic regime. Magnetic properties of PS/Fe nanocomposite were investigated by measuring the temperature dependence (77 – 700 K) of the specific magnetization (T) dependencies allowed us to determine the Curie temperature, Tc, which is very close to of the Curie temperature of the bulk Fe. A crystalline of the PS/Fe nanocomposites was studied by XRD. No peaks corresponded to Fe oxides are revealed on the XRD patterns

Modern Methods of Creating Casting Model Kits

The article presents some information about creation of model kits and core equipment for the manufacture of molds and rods of cold-hardening sand-clay mixtures in the individual, serial and mass production of castings of ferrous and non-ferrous metals. There was analyzed their constituent materials and investigated a number of mechanical properties of the binding components for their attachment. Was shown the analysis of adhesive compositions of the world’s leading manufacturers, used for the manufacture of high-strength model sets by 3D milling methods