ULTRA-DISPERSED ADDITIVES IN THE NICKEL COLLOID-ELECTROLYTE BATHS

2020 ◽  
Author(s):  
L.A. Degtyar ◽  
◽  
I.N. Tyaglivaya ◽  
K.V. Ovchinnikova ◽  
A.A. Kuts ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Wear Resistance ◽  
Zirconium Diboride ◽  
Internal Stresses ◽  
Agricultural Machinery ◽  
Nickel Coatings ◽  
Ultrafine Diamond ◽  
Optimal Values

The article presents the results of investigates of the effect of ultrafine additives - zirconium diboride, silicon carbide, diamond on the physic-mechanical properties of composite electrochemical nickel coatings obtained from colloid-electrolyte baths. It is shown that precipitation containing ultrafine diamond possess optimal values of microhardness, wear resistance and internal stresses. These coatings can be used as an alternative to chrome coatings on parts of agricultural machinery.

scholarly journals The effect of nano-additives on the processes of electrodeposition of nickel precipitation

2020 ◽  
Vol 175 ◽  
pp. 05010
Author(s):  
Liudmila Degtyar ◽  
Irina Zhukova ◽  
Vladimir Mishurov ◽  
Elena Shubina ◽  
Valeria Kovko
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Zirconium Diboride ◽  
Dispersed Phase ◽  
Nickel Matrix ◽  
Nickel Deposits ◽  
Ultrafine Diamond ◽  
Optimal Values ◽  
Nano Additives ◽  
Electrodeposition Of Nickel

The article presents the results of investigates of the effect of ultrafine additives (zirconium diboride, silicon carbide, diamond) on the physical and mechanical properties of composite electrochemical nickel deposits obtained from colloid-electrolyte baths. It was revealed that the most effective nanostructured additives are zirconium diboride and ultrafine diamond. Current efficiency and potentiostatic researches shew mutual participation of finely dispersed nickel hydroxide compounds in the formation of a composite electrochemical deposits and dispersed phase of zirconium diboride or ultrafine diamond that are attendant in the solution or formed during electrolysis and introduced into the electrolyte. It is shown that the optimal values of internal tensions and microhardness are associated with the hardening of the nickel matrix together with various nano-dispersed additives that are included in the deposit. These deposits can be used as an alternative to chrome deposits on parts of machinery.

scholarly journals Effect of silicon carbide modifiers on the physical-mechanical properties of gray cast iron and cast iron with spheroidal graphite

2021 ◽  
Vol 340 ◽  
pp. 01006
Author(s):  
Vladimir A. Poluboyarov ◽  
Anatoliy N. Cherepanov ◽  
Viktor A. Kuznetsov ◽  
Zoya A. Korotaeva ◽  
Alexander A. Zhdanok
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Wear Resistance ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Term Treatment ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Short Term Treatment ◽  
Maximal Increase

The influence of mechanochemically produced modifiers on the properties of cast iron at out-of-furnace modification has been studied. Short-term treatment in mechanochemical activators makes it possible to produce composite modifiers, which are wetted with iron melts, are uniformly distributed therein and effectively influence the crystallization processes. The effect of a modifier based on silicon carbide and chromium (as a protector metal) on the physical-mechanical properties of gray cast-iron and cast-iron with spheroidal graphite is considered. The introduction of SiC in the amount of 0.01-0.1 wt.% into gray cast iron causes the formation of mainly perlitic structure and, as a consequence, an increase in strength, hardness and wear resistance. For SiC content 0.1 wt.%, the tensile strength of GG-15 samples increased by 22.7%, GG-25 by 8%. The maximal increase in the hardness is observed for SiC concentration: for GG-15 – 0.1, for GG-25 – 0.01 wt.%. The GG-25 sample with 0.1 wt.% SiC exhibited the highest wear resistance. The introduction of SiC (0.01 – 0.1 wt.%) into cast iron with spheroidal graphite causes an increase in ferrite content, which promotes a substantial increase in impact viscosity and wear resistance (the highest wear resistance is observed with the introduction of 0.05 wt.% SiC).

scholarly journals STUDY OF MECHANICAL PROPERTIES AND WEAR BEHAVIOR OF ALUMINUM MATRIX COMPOSITES REINFORCED WITH SILICON CARBIDE PARTICLES

2019 ◽  
Vol 19 (3) ◽  
pp. 10
Author(s):  
Zehra Jilham
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Wear Resistance ◽  
Compression Strength ◽  
Wear Behavior ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Silicon Carbide Particles ◽  
Carbide Particles

ABSTRACTThe aim of this research is to study the mechanical properties and wear behavior of aluminum composite material (AMCs) reinforced with silicon carbide particles with varying percentages (0, 3, 6 and 9) wt. %. These composites samples were prepared by stir casting process. Tensile strength, compression strength, hardness and wear resistance of the prepared composites were analyzed. The result showed that adding SiC reinforced in Al matrix increased tensile strength, compression strength, wear resistance and hardness with increased wt. percentage of silicon carbide reinforced AMCs. Maximum tensile and compression strength and hardness showed at 9 wt. percentage SiC reinforced AMCs.

Surface Modification of Silicon Nano Mechanical Structures by Carbon Ion Implantation for Post-fabrication Transformation to Silicon Carbide

2005 ◽  
Vol 908 ◽  
Author(s):  
Kumar R Virwani ◽  
Dinesh K Sood ◽  
Robert G Elliman ◽  
Ajay P Malshe
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Surface Modification ◽  
Chemical Composition ◽  
Ion Implantation ◽  
Bending Strength ◽  
Internal Stresses ◽  
Carbon Ions ◽  
Carbon Ion ◽  
Unique Ability

AbstractInternal stresses can cause de-lamination and fracture of coatings and structures and it is well known that ion-implantation can be used to control such behavior through modification of the stress. Here, however, we show that the unique ability of implantation to create controlled stresses in materials by altering both the chemical composition and mechanical properties, combined with an increase in the bending strength of materials, can used to create novel vertical nanostructures. Silicon cantilevers (beams), 193nm thick, 200nm wide and 3μm long, were implanted with carbon ions to create a buried SiCx layers. The internal stresses generated by implantation caused the beams to bend at angles ranging from 10 degrees to greater than 90 degrees, leading to unique vertical nanostructures. This method can be used to create 3-D nano electromechanical systems (NEMS).

scholarly journals Characteristics Of Aluminium ADC 12/SiC Composite with the Addition of TiB and Sr Modifier

2019 ◽  
Vol 130 ◽  
pp. 01004
Author(s):  
Astari Indarsari ◽  
Anne Zulfia Syahrial ◽  
Budi Wahyu Utomo
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Wear Resistance ◽  
Elastic Modulus ◽  
Wear Rate ◽  
Thermal Resistance ◽  
Aluminium Alloy ◽  
Eutectic Phase ◽  
Grain Refiner ◽  
Brake Shoe

The addition of silicon carbide (SiC) as a reinforce in a composite can improve mechanical properties. In this study aluminium ADC 12 (Al-Si-Aluminium Alloy) is treated with an addition of SiC varied from (1; 1.5; 2; 2.5 to 3) vf% and mixed with 0.18 wt% Sr to change the morphology of the silicone eutectic phase and 0.15 wt% titanium boron (TiB) was added as a grain refiner as well as the addition of 5 wt% magnesium (Mg) to increase the wettability. All materials were fabricated by stir cast method. This research is conducted to obtain the candidate material for application in train's brake shoe and bearing. This kind of usage requires high mechanical properties such as wear resistance, thermal resistance, good elastic modulus and lightweight. The composites were characterised by both mechanical properties and microstructure. The result shows that there is an increase in the mechanical properties of aluminium ADC 12 /SiC composite compared to unreinforced with the value of 144 MPa of strength, 53 HRB of hardness, and 0.0049 mm3 m–1 of wear rate. As a result, the higher addition of the SiC results in the better mechanical properties for the composite.

Investigation Corrosion and Wear Behavior of Nickel-Nano Silicon Carbide on Stainless Steel 316L

2020 ◽  
Vol 1002 ◽  
pp. 33-43
Author(s):  
Nawal Mohammed Dawood ◽  
Nabaa S. Radhi ◽  
Zainab S. Al-Khafaji
Keyword(s):  
Silicon Carbide ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Wear Behavior ◽  
Corrosion And Wear ◽  
Corrosion Performance ◽  
Stainless Steel 316L ◽  
Nickel Coatings ◽  
Nano Silicon ◽  
Carbide Particles

This research signifies an attempt to apply composite coating by co-deposition coating and assessing, enhancement the Nickel coatings features, by adding the particles of silicon-carbide to solution of electrodeposited. Stainless steel specimens have been subject to electroplating coating utilizing Nickel and nanosilicon carbide particles (70-100 nm) with various amounts (16, 24, 32 and 40) g/L. After coating, the specimens were tested by SEM, AFM, impeded in a solution with 3.5 percent NaCl to investigate the corrosion performance. Then testing the microhardness, and wear resistance. Results obtained from this work showed a great reduction in corrosion currents caused by adding of inert nanoparticles. These enhancements had been detected on all conducted tests for corrosion and wear.

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