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Online since: March 2020
Authors: S.D. Polischuk, Yu.A. Stekolnikov, D.G. Churilov, N Yu Stekolnikova, V K Astanin, N.V. Byshov, S.N. Borychev
Particular attention is paid to the use of chrome plating methods making possible to increase the durability and reliability of the parts recovered in electrolytes of different composition, allowing to obtain coatings with high physical-mechanical properties that determine their suitability for the operation in the process of use for their intended purpose.
The use of periodic currents in repair production (by reversing direct, rectified currents, conversion of industrial frequency currents) allows adjustment of the amplitude duration and its magnitude in the cathode and anode component of the current, which makes possible to control the structure and the texture of the formed sediment and thereby its physical and mechanical properties [1-5].
In this regard, the purpose of the study is a low concentrated electrolyte of chromium plating with organic additives (150 g / l CrO3 + 1.5 g / l H2SO4 + 1.5 g / l crystal violet (CF)) and the physical-mechanical properties of chromium coatings.
They are highly economical, technological, environmentally friendly and make possible to obtain coatings with the required physical and mechanical properties.
During pulsed electrolysis, it is possible to control the composition of the components of chromium and iron alloys and to obtain coatings with desired properties from a single electrolyte.
The use of periodic currents in repair production (by reversing direct, rectified currents, conversion of industrial frequency currents) allows adjustment of the amplitude duration and its magnitude in the cathode and anode component of the current, which makes possible to control the structure and the texture of the formed sediment and thereby its physical and mechanical properties [1-5].
In this regard, the purpose of the study is a low concentrated electrolyte of chromium plating with organic additives (150 g / l CrO3 + 1.5 g / l H2SO4 + 1.5 g / l crystal violet (CF)) and the physical-mechanical properties of chromium coatings.
They are highly economical, technological, environmentally friendly and make possible to obtain coatings with the required physical and mechanical properties.
During pulsed electrolysis, it is possible to control the composition of the components of chromium and iron alloys and to obtain coatings with desired properties from a single electrolyte.
Online since: June 2013
Authors: Hui Leng Choo, Kam Hoe Yin, Dunant Halim, Chris Rudd
The main factors that affect the energy consumption of injection moulding system are categorised as displayed in Figure 1.
RFM makes use of experimental data to characterise the signal-response relationship as a function of the control factors and noise factors.
It was reported that manufacturing of PP product usually requires a maximum impact strength [14], thus this mechanical property together with energy consumption were made as the principal Green Ys.
Full factorial experiments with inner control factors array Row Control Factors Signal Factor: BT [°C] MT [°C] CT [s] 200 210 220 230 1 30 10 2 30 15 3 40 10 4 40 15 Figure 4.
Lastly, RFM clearly provided information on how the control factors affect the multiple responses.
RFM makes use of experimental data to characterise the signal-response relationship as a function of the control factors and noise factors.
It was reported that manufacturing of PP product usually requires a maximum impact strength [14], thus this mechanical property together with energy consumption were made as the principal Green Ys.
Full factorial experiments with inner control factors array Row Control Factors Signal Factor: BT [°C] MT [°C] CT [s] 200 210 220 230 1 30 10 2 30 15 3 40 10 4 40 15 Figure 4.
Lastly, RFM clearly provided information on how the control factors affect the multiple responses.
Online since: October 2020
Authors: Arsen Kharaev, Rima Bazheva, Zareta Inarkieva, Asker Kongapshev, Zakhirat Sultigova
Polyalkylene oxides, in particular, oligotetramethylene oxide (OTMO), which is a simple polyester with good physical and mechanical properties, can serve as this class.
When studying the influence of various factors on the formation of block copolymers, the maximum values of reduced viscosity and polymer yield were taken as the criterion of optimality of conditions.
Bazheva, Synthesis and properties of aromatic polyethersulfones, IJMET. 9 (2018) 1109-1116
Storozhuk, Synthesis and some properties of polycarbonate-polyalkylene oxide block copolymers, Proceedings of universities.
Godovsky, Synthesis and properties of block copolymers, Naukova Dumka, Kiev, 1983
When studying the influence of various factors on the formation of block copolymers, the maximum values of reduced viscosity and polymer yield were taken as the criterion of optimality of conditions.
Bazheva, Synthesis and properties of aromatic polyethersulfones, IJMET. 9 (2018) 1109-1116
Storozhuk, Synthesis and some properties of polycarbonate-polyalkylene oxide block copolymers, Proceedings of universities.
Godovsky, Synthesis and properties of block copolymers, Naukova Dumka, Kiev, 1983
Online since: August 2019
Authors: Yurii Volfkovich, Yuliya Dzyazko
Both hydrophilic and hydrophobic pores of different size are available for an inorganic modifier that is able to affect functional properties of the polymer.
In the framework of the approach [95], embedding of particles into ion exchange polymer is determined by a number of factors.
The influence of these factors is analyzed in [95].
Sosenkin, Porous structure and wetting of fuel cell components as the factors determining their electrochemical characteristics, Russ.
Morphology and functional properties, Micropor.
In the framework of the approach [95], embedding of particles into ion exchange polymer is determined by a number of factors.
The influence of these factors is analyzed in [95].
Sosenkin, Porous structure and wetting of fuel cell components as the factors determining their electrochemical characteristics, Russ.
Morphology and functional properties, Micropor.
Online since: February 2013
Authors: Prajakta Joge, Dinesh K. Kanchan, Poonam Sharma, Nirali Gondaliya
Hence, a requirement arises in order to improve the ionic conductivity as well as properties of the PVA based electrolytes.
Blending of polymers is one of the useful techniques of developing new polymeric materials without synthesizing new polymers in order to improve mechanical properties as well as conductivity of polymer electrolytes [5].
All these factors altogether lead to conductivity enhancement [15].
Dong, Properties of a nanocomposite polymer electrolyte from an amorphous comb-branch polymer and nanoparticles, J.
Katiyar, Effect of montmorillonite filler on structural and electrical properties of polymer nanocomposite electrolytes, Ionics 15 (2009) 345-352
Blending of polymers is one of the useful techniques of developing new polymeric materials without synthesizing new polymers in order to improve mechanical properties as well as conductivity of polymer electrolytes [5].
All these factors altogether lead to conductivity enhancement [15].
Dong, Properties of a nanocomposite polymer electrolyte from an amorphous comb-branch polymer and nanoparticles, J.
Katiyar, Effect of montmorillonite filler on structural and electrical properties of polymer nanocomposite electrolytes, Ionics 15 (2009) 345-352
Online since: January 2012
Authors: Byeong Uk Song, Keum Hee Seo, Kyung Tak Min, Ji Hyun Cho, Tae Il Seo
Optimal Design of Bone Plate System Using Finite Element Method
Ji-hyun Choa, Byeong-uk Songb, Keum-hee Seoc, Kyung-tak Mind and Tae-il Seoe
Mechanical & Robot Eng., School of Mechanical System Eng., University of Incheon, 12-1, Songdo-dong, Yeonsu-gu, Incheon, Korea (406-772)
n-ever @nate.coma, checol@nate.comb, dreamandsuccess@nate.comc, minkt@incheon.ac.krd, tiseo@incheon.ac.kre
Keywords: Bone fracture; bone plate; optimal design; finite element method.
The material of bone plates should be suitable strength and rigidity as mechanical property as well as have several other conditions.
Table 1 Material Properties of Titanium Alloy Young’s Modulus (GPa) Poisson’s Ratio Density (kg/mm3) 96 0.36 4.62´10-6 Finite Element Method Analysis Evaluation Method of the Bone Plate.
The support rollers were considered as rigid body in order to avoid affecting the displacements under loading.
The geometric shapes of the bone plates were modeled by parametric modeling technique and design factors could be easily modified.
The material of bone plates should be suitable strength and rigidity as mechanical property as well as have several other conditions.
Table 1 Material Properties of Titanium Alloy Young’s Modulus (GPa) Poisson’s Ratio Density (kg/mm3) 96 0.36 4.62´10-6 Finite Element Method Analysis Evaluation Method of the Bone Plate.
The support rollers were considered as rigid body in order to avoid affecting the displacements under loading.
The geometric shapes of the bone plates were modeled by parametric modeling technique and design factors could be easily modified.
Online since: December 2011
Authors: A.M. Salcedo-Garrido, H. Mendoza-León, Thierry Baudin, Richard Penelle, Francisco Cruz-Gandarilla
Anisotropy of physical and mechanical properties of textured polycrystalline materials strongly depends on microstructural characteristics, such as subgrain sizes, lattice deformations, etc.
Generalized Pole Figures (GPF) [1] are an attempt to estimate the anisotropy of these properties; so, the energy stored during plastic deformation is a key parameter in primary recrystallization.
Introduction Anisotropic polycrystalline materials (bulk and thin films) show microstructural parameters that affect their properties, i.e. grain and subgrain size, lattice deformations, crystallographic texture, presence of different phase, etc.
The stored energy values vary about a factor 3 to 6.
Delhez, Th.H. de Keijser and E.Mittemeijer, Profile Analysis for Microcrystalline Properties by the Fourier and Other Methods, Aust.
Generalized Pole Figures (GPF) [1] are an attempt to estimate the anisotropy of these properties; so, the energy stored during plastic deformation is a key parameter in primary recrystallization.
Introduction Anisotropic polycrystalline materials (bulk and thin films) show microstructural parameters that affect their properties, i.e. grain and subgrain size, lattice deformations, crystallographic texture, presence of different phase, etc.
The stored energy values vary about a factor 3 to 6.
Delhez, Th.H. de Keijser and E.Mittemeijer, Profile Analysis for Microcrystalline Properties by the Fourier and Other Methods, Aust.
Online since: March 2025
Authors: Fadey F. Komarov, Mary N. Zhukava
The problem of resistance of spacecraft external surfaces to space factors is important due to development of long-duration orbital space flight missions.
AO is one of the most important factors causing severe damage to many polymeric materials on spacecraft.
Movement of the focusing lens along the vertical axis was carried out with a minimum step of 0.1 mm, which allowed controlling the diameter of the focusing spot and, accordingly, the density of laser radiation power affecting the surface of the material.
Due to the microscopic inhomogeneities and cavities on the side walls of grooves and pyramids, as well as due to the inherent absorption properties of MWCNTs ‘Taunit-M’, it is possible to increase the efficiency of structured materials.
Novikov, Structural and mechanical properties changes in carbon and boron nitride nanotubes under the impact of atomic oxygen, in: J.
AO is one of the most important factors causing severe damage to many polymeric materials on spacecraft.
Movement of the focusing lens along the vertical axis was carried out with a minimum step of 0.1 mm, which allowed controlling the diameter of the focusing spot and, accordingly, the density of laser radiation power affecting the surface of the material.
Due to the microscopic inhomogeneities and cavities on the side walls of grooves and pyramids, as well as due to the inherent absorption properties of MWCNTs ‘Taunit-M’, it is possible to increase the efficiency of structured materials.
Novikov, Structural and mechanical properties changes in carbon and boron nitride nanotubes under the impact of atomic oxygen, in: J.
Online since: January 2012
Authors: Li Hong Lu, De Jiu Shen, Jing Wu Zhang, Chang Hong Guo
School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, P.R.
It can be employed to produce thick (e.g. 50–150μm), hard ceramic coatings, with improved thermo-mechanical, wear and corrosion resistance properties compared with conventional anodizing technique [4-8].
When the NaCl concentration is lower than 10% in solutions, it doesn’t affect the concentration of dissolved oxygen in the solutions, so it doesn’t restrict the cathode reaction.
Although the Cl- is enough in solutions, it is not the control effect factors.
▲:PEO samples ■: 45# steel samples Conclusions The conclusions from the properties investigation of the ceramic coatings are as follows: (1) There are many micro-pores in the micro-arc oxidation ceramic coatings, which result in the discharge channels all over the ceramic coatings
It can be employed to produce thick (e.g. 50–150μm), hard ceramic coatings, with improved thermo-mechanical, wear and corrosion resistance properties compared with conventional anodizing technique [4-8].
When the NaCl concentration is lower than 10% in solutions, it doesn’t affect the concentration of dissolved oxygen in the solutions, so it doesn’t restrict the cathode reaction.
Although the Cl- is enough in solutions, it is not the control effect factors.
▲:PEO samples ■: 45# steel samples Conclusions The conclusions from the properties investigation of the ceramic coatings are as follows: (1) There are many micro-pores in the micro-arc oxidation ceramic coatings, which result in the discharge channels all over the ceramic coatings
Online since: May 2012
Authors: Xiao Yan He, Ming Bao Gao, Yan Ru Zhao
It has good mechanical properties and durability, and can solve the difficult problems of leak vibration, excessive vibration and difficulties in vibration of steel-intensive.
On the basis of self-compacting concrete, the concrete mixed with random distribution of the steel fibers has not only good liquidity of self-compacting concrete and fine crack resistance of steel fiber concrete, but also overcomes the poor tensile properties or ductility shortcomings of the common concrete, In the same time, it has high crack resistance, high permeability and high toughness5.
Ru Mu8 researches the steel fiber to restrain damage of concrete from many factors.
Because the incorporation of steel fibers will affect the mobility of self-compacting concrete, so this test uses little steel fiber, the maximum content of steel fiber is 0.6%. 1.3 Test method The freeze-thaw test is to use Chinese GB/T50082-2009 Ordinary Concrete Long-term Performance and Durability Test Method Standard10 of the quick frozen method.
Beijing: Mechanical industry press, 2009, I
On the basis of self-compacting concrete, the concrete mixed with random distribution of the steel fibers has not only good liquidity of self-compacting concrete and fine crack resistance of steel fiber concrete, but also overcomes the poor tensile properties or ductility shortcomings of the common concrete, In the same time, it has high crack resistance, high permeability and high toughness5.
Ru Mu8 researches the steel fiber to restrain damage of concrete from many factors.
Because the incorporation of steel fibers will affect the mobility of self-compacting concrete, so this test uses little steel fiber, the maximum content of steel fiber is 0.6%. 1.3 Test method The freeze-thaw test is to use Chinese GB/T50082-2009 Ordinary Concrete Long-term Performance and Durability Test Method Standard10 of the quick frozen method.
Beijing: Mechanical industry press, 2009, I