Effect of Current Density on the Composition and Mechanical Properties of Cr1-xAlxN Coating by Ion Arc Plating

2012 ◽  
Vol 557-559 ◽  
pp. 1971-1974
Author(s):  
Cheng Xi Wang ◽  
Ji Hua Peng ◽  
Xian Wen Liang ◽  
Jun Tian
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Current Density ◽  
Adhesion Force ◽  
Atomic Ratio ◽  
Pure Metal ◽  
Metal Target ◽  
Micro Hardness ◽  
Al Content ◽  
Maximum Value

The Cr1-xAlxN coatings were deposited onto M2 tool steel using ion arc plating technique. The effect of current density on the surface morphology and mechanical properties of TiN/CrAlN coating was made. It was found that adjusting the pure metal target currents is not only to change the metal atomic ratio, but also to influence the surface morphology, their hardness and adhesion. The micro hardness Hv increases almost linearly with Al content of the coating in this study, and the Cr0.41Al0.59N coating reaches Hv 2950. The adhesion force between the coating and the substrate reaches maximum value 55N, when the [Al]/[Al+Cr] ratio is 0.44.

scholarly journals THE INVESTIGATON OF PHYSICAL AND MECHANICAL PROPERTIES OF NI-P COATINGS / NI-P DANGŲ FIZIKINIŲ IR MECHANINIŲ SAVYBIŲ TYRIMAS

2016 ◽  
Vol 7 (6) ◽  
pp. 605-608
Author(s):  
Vadim Chayevski ◽  
Valerij Zhylinski
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Current Density ◽  
Steel Surface ◽  
Physical And Mechanical Properties ◽  
Micro Hardness ◽  
Chloride Electrolyte ◽  
Maximum Value

The parameters of electrolytic synthesis of Ni-P coatings on steel surface from sulfate-chloride electrolyte have been determinated. The Ni-P alloys consist of separate phases of Ni and Ni3P and solid solution of implementation on the basis of the FCC Ni lattice, when it was deposited from the electrolyte at current density to be more than 7 A/dm2. The coating was formed with continuous globular surface at current density of 5 A/dm2. The globular formations are the Ni3P phase. The obtained at current density of 9 A/dm2 coatings have maximum value of micro¬hardness 430 HV. Darbe buvo nustatyti Ni-P dangų ant plieno paviršiaus elektrolitinės sintezės (iš sulfatinio-chloridinio elektrolito) parametrai. Ni-P lydinių mikrostruktūrą sudaro atskiros Ni ir Ni3P fazės arba nikelio kietasis įterpimo tirpalas, turintis kubinę paviršiaus centruotą gardelę, kai dangos yra nusodinamos iš elektrolito, esant srovės tankiui daugiau negu 7 A/dm2. Kai srovės tankis yra daugiau negu 5 A/dm2, formuojasi ištisinis, rutulinio pobūdžio dangos paviršius. Rutulio formos darinius sudaro Ni3P fazė. Dangos, turinčios didžiausią mikrokietumo reikšmę 430 HV, gautos esant srovės tankiui 9 A/dm2.

scholarly journals Performance of MoS2/Zr Composite Coatings at Different Deposition Temperatures

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5100
Author(s):  
Wenlong Song ◽  
Kai Sun ◽  
Guangming Zhao ◽  
Long Zhu ◽  
Shoujun Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Deposition Temperature ◽  
Adhesion Force ◽  
Composite Coatings ◽  
Hardened Steel ◽  
Dry Sliding ◽  
Micro Hardness ◽  
Properties Of Coatings ◽  
Mechanical And Tribological Properties ◽  
Deposition Technology

The properties of the MoS2/Zr coatings can be significantly affected by the deposition temperature. In this study, the MoS2/Zr composite coatings were fabricated on the cemented carbide surface, utilizing the duplex deposition technology at various deposition temperatures. The effects of deposition temperature on the mechanical and friction properties of the MoS2/Zr coatings were systematically studied. Results exhibited that as the deposition temperature increased, the adhesion force increased first and then decreased, and the coating thickness and micro-hardness gradually increased. Dry sliding tests against a hardened steel ring showed that the tribological behaviors and wear mechanisms of the MoS2/Zr coatings varied with deposition temperature, which were due to the changing mechanical properties of coatings caused by the temperature. The coatings deposited at a temperature of 180 °C and 200 °C possessed preferable comprehensive mechanical and tribological properties.

Effect of Zr Content on Properties of Mg-Zr PM Damping Alloys

2011 ◽  
Vol 84-85 ◽  
pp. 58-63
Author(s):  
Zi Li Liu ◽  
Fei Fei ◽  
Ping Shen ◽  
Gui Bin Zhou ◽  
Xi Qin Liu
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Bending Test ◽  
Damping Capacity ◽  
Micro Hardness ◽  
Three Point Bending ◽  
Zr Addition ◽  
Maximum Value ◽  
Damping Peak ◽  
Zr Alloy

Mg-xZr damping alloys (x=0.6, 1.5, 2.5, 5, mass %) were prepared by PM (powder metallurgy ) technology, and effects of Zr contents on microstructure, mechanical properties and damping capacities of Mg-xZr damping alloys were researched by three-point bending test and DMA, etc. The results show that the microstructure become into strip-shaped morphology, more granular particles appear in the grain boundaries or inside grains, and the grains are more refined with the increase of Zr additions. Micro-hardness and bending strength of the Mg-xZr damping alloys increase with increasing addition of Zr, and reach the maximum value with Zr addition of 2.5%. The damping capacities of Mg-xZr alloys increase slowly with the temperature from 27°C to 100°C, and increase rapidly above 100°C. The damping peaks appear at temperature of 160°C. Mg-5％Zr alloy exhibits the highest damping capacity, and its tanf value reaches to 0.084. The temperature of the damping peak increases with increasing frequencies, showing the characteristic of relaxation damping.

Effects of Different Preparation Parameters on the Properties of MAO Coatings

2014 ◽  
Vol 609-610 ◽  
pp. 14-19 ◽  
Author(s):  
Xin Wu ◽  
Qing Min Liu ◽  
Hong Xia Li
Keyword(s):  
Mechanical Properties ◽  
Growth Rate ◽  
Wear Resistance ◽  
Current Density ◽  
Ceramic Coating ◽  
Electrolyte Concentration ◽  
Measurement Properties ◽  
Micro Hardness ◽  
Micro Arc Oxidation ◽  
Hardness Values

Effects of different preparation parameters on the structural and mechanical properties of micro-arc oxidation coatings prepared in silicate electrolyte on 6063 alloy were investigated. The results show that the growth rate of ceramic coating increases with increasing current density and electrolyte concentration. The prepared coating had denser and smoother surface with few defects, higher micro-hardness values and better wear resistance when the current density was increased to 20A/dm2. The measurement properties were all up to their optimum values when the electrolyte concentration was in the range of 9-12g/l and oxidation time was 60min, respectively.

Effect of Al Content on the Microstructure and Property of TiC/Al Ceramic Matrix Coating Deposited by Laser Cladding on Ti-6Al-4V Alloy

2011 ◽  
Vol 306-307 ◽  
pp. 557-561
Author(s):  
Jian Hong Wang ◽  
Jun Cheng ◽  
Pei Kang Bai ◽  
Yu Xin Li
Keyword(s):  
Atomic Ratio ◽  
Micro Hardness ◽  
Aluminum Powders ◽  
Wear Rates ◽  
Al Content ◽  
Metallurgical Bonding ◽  
Modified Surface ◽  
Cladding Layers ◽  
Modified Surface Layer

Laser surface cladding of Ti-6Al-4V alloy by Ti+C+Al powders (Titanium and carbon powders with an atomic ratio of 1:1 were mixed with 20-40wt.% aluminum powders) was investigated. TiC particles were in situ formed mainly during the solidification. Effect of Al content on the porosity and microstructure of the cladding layer was studied. The resultant microstructure in the modified surface layer was characterized and the micro-hardness on the cladding layers was measured, as well as the wear rates. The results show that the coating had good metallurgical bonding with substrate when the Al mass fraction in Al-Ti-C system is 30 %. The micro-hardness of coating is 802HV0.5 which is 2~3 times as that of the Ti-6Al-4V alloy approximately.

Effect of Current Density on the Microstructure and Mechanical Properties of TiN/TiAlN Duplex Coating Deposited on SKH51 Steel

2010 ◽  
Vol 139-141 ◽  
pp. 402-405
Author(s):  
Ri Sheng Du ◽  
Ji Hua Peng ◽  
Xian Wen Liang ◽  
Jun Tian
Keyword(s):  
Mechanical Properties ◽  
Tool Steel ◽  
Current Density ◽  
Vickers Microhardness ◽  
Adhesion Force ◽  
Ion Plating ◽  
Duplex Coating ◽  
Microstructure And Mechanical Properties ◽  
Duplex Coatings ◽  
Peak Value

In this paper, the TiN/TiAlN duplex coatings were deposited on SKH51 tool steel by means of multi-arc ion plating. By means of SEM, Vickers microhardness tester and scratch tester, the effect of target current levels on the surface morphology and mechanical properties of TiN/TiAlN duplex coatings on SKH51 tool steel was studied. During deposition, the effect of target current on microstructure and mechanical properties is responsible for the number, energy of emission target particles and distribution of target droplets. It was found that the thickness and microhardness of coatings, and the number of droplets with diameter more than 2 m increased with target current increasing. The adhesion force between coating and substrate reaches a peak value of 40.5N at 70A. From application view, it is better to control the Ti-Al target current density at 9.88x10-3 A/mm2.

scholarly journals Initial and Recrystallization Textures of Nickel Electrodeposits

2000 ◽  
Vol 34 (2-3) ◽  
pp. 159-169 ◽  
Author(s):  
Insoo Kim ◽  
Sae Gwang Lee
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Boric Acid ◽  
Current Density ◽  
Recrystallization Texture ◽  
Nickel Sulfate ◽  
Nickel Chloride ◽  
Nickel Electrodeposits ◽  
Morphology And Mechanical Properties ◽  
Deposition Conditions

The texture of electrodeposits vary with deposition conditions. Electrodeposits texture is also related to microstructure, surface morphology and mechanical properties. When the electrodeposits annealed, the recrystallization texture may be different from the original deposition texture. The surface morphology, the microstructure and the initial and recrystallization textures of nickel electrodeposits vary with deposition conditions.The 〈100〉 and 〈110〉 textures of nickel electrodeposits can be obtained from nickel sulfate, nickel chloride and boric acid baths. The size of surface asperities decreases with increasing current density and decreasing temperature. The 〈100〉 and 〈110〉 textures of nickel electrodeposits changed to the 〈100〉 and 〈310〉 texture, when recrystallized, respectively.

Micro-Hardness and Morphology of LDPE Influenced by Beta Radiation

2014 ◽  
Vol 606 ◽  
pp. 253-256 ◽  
Author(s):  
Martin Ovsik ◽  
Petr Kratky ◽  
David Manas ◽  
Miroslav Manas ◽  
Michal Stanek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hardness Test ◽  
Polymer Materials ◽  
Beta Radiation ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
Depth Sensing ◽  
Surface Layers ◽  
Hardness Values ◽  
Different Doses

This article deals with the influence of different doses of Beta radiation to the structure and mico-mechanical properties of Low-density polyethylene (LDPE). Hard surface layers of polymer materials, especially LDPE, can be formed by radiation cross-linking by β radiation with doses of 33, 66 and 99 kGy. Material properties created by β radiation are measured by micro-hardness test using the DSI method (Depth Sensing Indentation). Individual radiation doses caused structural and micro-mechanical changes which have a significant effect on the final properties of the LDPE tested. The highest values of micro-mechanical properties were reached at radiation dose of 66 and 99 kGy, when the micro-hardness values increased by about 21%. The changes were examined and confirmed by X-ray diffraction.

Influence of Melt Temperature on Compressive Plasticity of a Cu-Zr-Al Bulk Metallic Glass

2010 ◽  
Vol 146-147 ◽  
pp. 517-521
Author(s):  
Sheng Hui Xie ◽  
Xie Rong Zeng ◽  
Dong Ju Fu ◽  
Lei Zhao ◽  
Qiang Hu
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Metallic Glasses ◽  
Mechanical Performance ◽  
Casting Temperature ◽  
Thermal And Mechanical Properties ◽  
Micro Hardness ◽  
Melt Temperature ◽  
Hardness Tests ◽  
Important Solution

Cu47.5Zr47.5Al5 bulk metallic glasses (BMGs) were cast from the melt temperature 1143 to 1373 K. The structure, thermal and mechanical properties of the BMGs were investigated by XRD, DSC, HRTEM, dilatometric measurements, micro-hardness tests and uniaxial compression. The results indicate that the microstructure and mechanical performance of BMGs are closely affected by the casting temperature. Proper casting temperature ensures the BMGs with large relaxed excess free volume (REFV) and nano-crystallites, which favor the plastic deformation in Cu47.5Zr47.5Al5 BMGs. Regulating the preparing parameters is an important solution to good plasticity in BMGs.

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