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Online since: February 2022
Authors: Zhanna V. Eremeeva, Saeed Kamali, Artem I. Lizunov, Vasiliy A. Ovchinnikov
The highest value of the relative density was achieved during SPS sintering of blanks from B4C powders obtained by mechanosynthesis and SHS methods.
For powders obtained by the SHS method, the density of sintered blanks is 98.5 rel.%. at 1800 oC/30 MPa with sintering time of 45 min.
SEM images of the fractures of hot-pressed boron carbide specimens obtained by various methods: a) SHS method; b) reduction with carbon followed by breaking and grinding; c) mechanosynthesis of amorphous boron and soot; d) direct synthesis during hot pressing.
For powders obtained by the SHS method, the density of sintered blanks is 98.5 rel.%. at 1800 oC/30 MPa with a sintering time of 45 min. 3. 
Petrzhik, Application of electrospark deposition process and modified SHS electrode materials to improve the endurance of hot mill rolls.
Online since: January 2007
Authors: Tatiana F. Grigorieva, Piotr Vitiaz, Nikolay Lyakhov, Antonina Barinova, Tatsiana Talaka, Andrey Letsko
On the second step (SHS), iron and aluminum reacts, forming intermetallic FeAl.
For preparing mechanocomposites AGO-2 planetary ball mills with water cooling were used (drum volume 250 cm3; ball diameter 5 mm; ball charge 200g; sample weight 10 g; rotation speed of grinding drums around the common axis 1000 rpm).
This reaction is very fast and has no induction period; i.e., a mechanically stimulated SHS reaction takes place in the activator.
The following SHS process leads to the formation of FeAl intermetallic.
As-synthesized powder completely inherits the precursor structural morphology, which opens new opportunities of designing SHS materials.
Online since: August 2021
Authors: Alexey Sobachkin, Marina V. Loginova, Valery Yu. Filimonov
Filimonov1,c 1Polzunov Altai State Technical University, Barnaul, Russia aanicpt@rambler.ru, banicpt@mail.ru, canicpt@list.ru Keywords: self-propagating high-temperature synthesis (SHS), mechanical activation, cladding, titanium aluminides Abstract.
The influence of mechanoactivated reagents cladding on the structural-phase state of the SHS-products was investigated.
During the grinding process, so-called mechanocomposites (precursors) are formed.
At the same time, the presence of cladding film will neutralize interaction with the gas medium in the SHS process.
In this regard, the work’s aim is to establish the features of SHS reaction in clad mechanocomposites.
Online since: November 2005
Authors: Jerzy Lis, Ludosław Stobierski, L. Jaworska, B. Krolicka, Jerzy Morgiel, W. Maziarz
Molybdenum silicides were obtained by the self-propagating synthesis (SHS) method.
The SHS is especially useful for silicide production due to low temperature of ignition starting this process.
A certain drawback of SHS technique is that the combustion products - except the main phase - usually contain also other minor phases.
Next, powders were formed into discs by compacting in steel matrix and synthesised using SHS technique.
The products of SHS reaction were crushed in Abbich mortar to powder with grain size of 0.5 mm and next they were milled in rotary-vibratory mill with WC grinding media in anhydrous isopropyl alcohol to power with specific surface area of 10 m2/g.
Online since: October 2008
Authors: D. Vallauri, S. Grassini, R. Alexandre, Bruno DeBenedetti
Besides, each one of the aforementioned technologies require multi-stage processing with a number of time- and resourceconsuming steps like e.g. powder production, powder blending and mixing of additives, cold shaping, densification, machining, grinding and finishing.
Among various materials, TiC and TiB2 can be synthesized by means of SHS [15].
Fig.2 shows the products of the pressure-assisted SHS, as reacted and after polishing.
Products of pressure-assisted SHS, as reacted (a) and after polishing (b).
Composite targets fabricated by assembling the plates produced by SHS.
Online since: August 2018
Authors: Jun Shou Li, Xiang Jun Tang, Li Qing, Fang Zhao
The Ti3SiC2-TiB2-TiC three-phase ceramics are prepared by Spark Plasma Sintering (SPS) method with Self-propagating High-temperature Synthesis (SHS) using Ti, Si, C andB4C powders.
Experiment With Ti, Si, C and B4C as the raw materials, the three-phase composite ceramic powders composed of Ti3SiC2, TiB2 and TiC are prepared by SHS.
According to different purposes, the electrical discharge machining can be divided into EDM wire cutting, EDM processing and EDM grinding, etc.
Conclusions (1) With Ti3SiC2, TiB2, TiC three-phase composite powders prepared by SHS as the raw materials, the relatively dense Ti3SiC2-TiC-TiB2 block composite ceramics can be obtained by SPS.
[9] Liang B.Y., Zhang W.X., Feng Y.X., Microstructure and Grinding Property of Ti3SiC2/diamond Composites Fabricated by Spark Plasma Sintering, Materials Science and Engineering of Powder Metallurgy. 22(2017) 399-406
Online since: July 2014
Authors: M. Gajendiran, N. Nallusamy
The sensible heat storage (SHS) system is simple and a well-developed ancient technology.
Comparative studies of SHS and LHS systems have been carried out by Vijay padmaraju et al. [10].
The process involves grinding the wet pulp, pressing and drying with the help of steam.
After grinding the pulp it is passed through rollers, where the excess water is squeezed out and it is passed through heating rollers and drying drums (Fig.3), where the paper is dried to final stage.
From the design calculations, the number of solar panels, quantity of PCM and SHS material were decided.
Online since: July 2019
Authors: Hoc Thang Nguyen
Concentration of SHS used in the design of experiments.
Mixture Concentration of SHS [M] MixGeo0 0 MixGeo2 2 MixGeo4 4 MixGeo6 6 MixGeo8 8 MixGeo10 10 Testing for engineering properties Sodium Hydroxide Solution Characterizing for microstructure Ash of Brickyard Drying, Grinding, and Sieving Mixing Curing at room conditions for 28 days Molding Fig. 1.
Table 1 showed the SHS concentration for producing of geopolymer-based materials.
The Geopolymer-based geopolymer specimens with SHS 10M appeared phenomena of swell and macro-cracks.
XRD pattern of the geopolymer-based material with SHS 6M.
Online since: July 2010
Authors: Zhen Lin Lu, Hui Xie, Lei Jia, Si Ming Wang, Ji Ling Zhu
Cu-Mo-Si alloys with different Cu contents were prepared by self-propagation high-temperature synthesis (SHS).
In the present paper, four kinds of Cu-Mo-Si alloys with a small amount of molybdenum silicides were prepared by SHS process, and then the microstructure and wear performance of the alloys were investigated.
Experimental details Cu-Mo-Si alloys with different Cu contents (80, 85, 90 and 95 wt.%) were fabricated using SHS process from 99.9% pure MoO3, 99.9% pure CuO, 99.9% pure Al, 99% pure Si and 99.9% pure Cu powder with a mesh size of about 200, where the atomic ratio of Mo to Si was 1:2.
When the Cu content of the sample is about 80%, the color of grinding crack on the surface of counterpart disc is close to that of commercial 45 # carbon steel, which can be attributed to a decrease of Cu transfer from the sample to counterpart disc.
Online since: July 2013
Authors: Rajshree B. Jotania, Nital R. Panchal
Among these methods, co-precipitation and self-propagating high temperature synthesis (SHS) are low-cost, simple and easy techniques for preparation of ferrite and no further grinding is required to prepare powder samples.
Sample Synthesis route Ag16+ ion fluence 1 SrFe12O19 co-precipitation 1x1012 ions/cm2 2 SrFe12O19 co-precipitation 1x1013 ions/cm2 3 SrFe12O19 SHS 1x1012 ions/cm2 4 SrFe12O19 SHS 1x1013 ions/cm2 2.2 SRIM Calculation for SrFe12O19 Hexaferrites.
But for the case of SrFe12O19 prepared by SHS route, grain size decreases from 79 nm to 48 nm with Ag16+ irradiation.
Fig. 6 The variation of dielectric constant with frequency of SrFe12O19 hexaferrite samples prepared by an SHS route Fig. 7 The variation of dielectric loss tangent with frequency of SrFe12O19 hexaferrite samples prepared by an SHS route 3.5 Magnetic Properties.
Summary Strontium hexaferrite nanoparticles are successfully synthesized by two methods, namely co-precipitation and SHS routes.