Improved mechanical properties of Cu–Sn–Zn–TiO2 coatings

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040039
Author(s):  
Yuxin Wang ◽  
Weidong Gao ◽  
Zhen He ◽  
Shengping Zhang ◽  
Li Yin
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Nanocomposite Coatings ◽  
Cross Sectional ◽  
Coating Surface ◽  
Tio2 Coatings ◽  
Surface Morphologies ◽  
Wear Tests

This study applied the pulse electrodeposition and duplex electrodeposition techniques to improve the mechanical properties of Cu–Sn–Zn–TiO2 nanocomposite coatings. The phase constituents and surface morphologies of prepared coatings were characterized. The cross-sectional information was recorded. The mechanical properties were determined by microhardness and wear tests. All the prepared coatings presented a nodular surface. Both the addition of TiO2 particles and nickel inner layer refined the coating surface. The pulse electrodeposition led to increased microhardness, while the addition of nickel inner layer further increased the mechanical performance. The best mechanical performance was achieved for the duplex Cu–Sn–Zn–TiO2/Ni nanocomposite coating prepared via pulse electrodeposition.

Preparation of Ni-ZrO2-CeO2 Nanocomposite Coatings by Pulse Electrodeposition

2013 ◽  
Vol 395-396 ◽  
pp. 174-178 ◽  
Author(s):  
Yang Yang Xu ◽  
Yu Jun Xue ◽  
Fang Yang ◽  
Chun Yang Liu ◽  
Ji Shun Li
Keyword(s):  
Current Density ◽  
Smooth Surface ◽  
Pulse Current ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Nanocomposite Coatings ◽  
Duty Ratio ◽  
Average Current Density ◽  
Average Current ◽  
Surface Morphologies

Ni-ZrO2-CeO2nanocomposite coatings were prepared by pulse electrodeposition. The effect additions of ZrO2and CeO2nanoparticles, average current density, duty ratio and frequency of pulse current on nanoparticle contents of Ni-ZrO2-CeO2nanocomposites were studied. The surface morphologies and microhardness of different nanocomposite coatings (Ni-ZrO2, Ni-CeO2, Ni-ZrO2-CeO2) were analyzed. The results show that, with the average current density, duty ratio and frequency increased, the nanoparticle contents increased at first and then decreased. Compared with Ni-ZrO2and Ni-CeO2, the surface morphology of Ni-ZrO2-CeO2nanocomposite coating showed better smooth surface and more compact microstructure, the microhardness was also higher.

Preparation of Ni-Nd2O3 Nanocomposite Coatings by Electrodeposition under Dual-Frequency Ultrasound

2012 ◽  
Vol 591-593 ◽  
pp. 1001-1005 ◽  
Author(s):  
Zheng Hong Ao ◽  
Yu Jun Xue ◽  
Xian Hui Li ◽  
Ji Shun Li
Keyword(s):  
Smooth Surface ◽  
Cathode Current Density ◽  
Nanocomposite Coating ◽  
Nanocomposite Coatings ◽  
Probe Type ◽  
Dual Frequency ◽  
High Quality ◽  
Cathode Current ◽  
Surface Morphologies ◽  
Frequency Ultrasound

The Ni-Nd2O3 nanocomposite coatings were prepared by electrodeposition under dual-frequency ultrasound(DU). The Nd2O3 content and surface morphology of Ni-Nd2O3 nanocomposite coatings were analyzed by scanning electron microscopy (SEM). The results showed that the Nd2O3 content of the nanocomposite coating prepared by electrodeposition using DU was high at 3.48% and the surface morphologies of DU nanocomposite coating showed better smooth surface, finer grain and more compact microstructure. A kind of method to prepare high quality Ni-Nd2O3 nanocomposite coating was obtained, which was: 40 g/L Nd2O3 nanoparticles, 45°C the temperature of electrolyte, 4A/dm2 cathode current density, 240W the power of bath-type ultrasound(BU), 100kHz the frequency of BU, 30W the power of probe-type ultrasound(PU), 20kHz the frequency of PU, and 1000r/min the stirring speed.

Surface Engineering of the Hydrogenated DLC (a-C:H) Coatings with Optimized Mechanical Performance

2013 ◽  
Vol 816-817 ◽  
pp. 33-37
Author(s):  
Mirela Contulov ◽  
Rodica Vladoiu ◽  
Aurelia Mandes ◽  
Victor Ciupina ◽  
Vilma Buršíková
Keyword(s):  
Mechanical Properties ◽  
Surface Engineering ◽  
Mechanical Performance ◽  
Vacuum Arc ◽  
Deposition Technique ◽  
Depth Sensing ◽  
Cross Sectional ◽  
Thermionic Vacuum Arc

The aim of this contribution is to present the properties of the hydrogenated DLC (a-C:H) films and to study their growth carried out in a special deposition technique based on Gaseous Thermionic Vacuum Arc (G-TVA) method. The mechanical properties were investigated on cross-sectional samples using the Fischerscope HM 2000 depth sensing indentation (DSI) tester.

Microstructure and properties of TiO2 sol-enhanced black nickel nanocomposite coating

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744023
Author(s):  
Hu Bo ◽  
Fengyan Hou ◽  
See Leng Tay ◽  
Yuxin Wang ◽  
Wei Gao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Nickel Coating ◽  
Nanocomposite Coating ◽  
Nanocomposite Coatings ◽  
Microstructure And Properties ◽  
Nickel Coatings ◽  
Tio2 Sol ◽  
Black Color ◽  
Black Nickel

Black nickel coatings are widely used in industries due to their shiny black color and other unique properties. However these coatings are normally soft, which limits their applications. In order to increase the mechanical properties of black nickel coatings, sol-enhanced technology has been applied to the plating process. TiO2 sol-enhanced black nickel nanocomposite coatings were electroplated on nickel-coated brass. A systematic study on the microstructure and properties of the black coatings were conducted. The effects of TiO2 concentration (TiO2 sol concentration in 0–20 mL/L) on the surface morphology, nanohardness and wear resistance have been studied. The results indicated that the nanohardness of the sol-enhanced black nickel coating was increased by [Formula: see text]20%. The mechanisms of improvement and surface morphology variation were also discussed.

Corrosion Resistance of Ni-ZrO2 Nanocomposite Coating Prepared by Pulse Electrodeposition with Rotating Cathode in an Ultrasonic Field

2013 ◽  
Vol 278-280 ◽  
pp. 422-425 ◽  
Author(s):  
Ya Fang Tian ◽  
Xian Hui Li ◽  
Zheng Hong Ao ◽  
Yu Jun Xue
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Composite Coating ◽  
Pulse Current ◽  
Composite Coatings ◽  
Ultrasonic Field ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Lower Corrosion Rate ◽  
Surface Morphologies

The Ni- ZrO2 nanocomposite coatings were prepared by pulse electrodeposition with rotating cathode in an ultrasonic field, and the corrosion resistance of the coatings were studied in 5% H2SO4. The surface morphologies of composite coatings after corrosion were analyzed by scanning electron microscope (SEM). And corrosion rate was tested using an electronic balance. The results shows that, compared with pure Ni coating, pulse current composite coating and pulse current composite coating with ultrasound, the Ni-ZrO2 nanocomposite coating prepared by pulse electrodeposition with rotating cathode in an ultrasonic field has more uniform micro-structure, more compacted grain and lower corrosion rate. Peculiarly, it exhibits excellent corrosion resistance.

Papillary muscles split in the presence of 2,3-butanedione monoxime have normal energetic and mechanical properties

1995 ◽  
Vol 269 (5) ◽  
pp. H1685-H1694 ◽  
Author(s):  
H. Kiriazis ◽  
C. L. Gibbs
Keyword(s):  
Mechanical Properties ◽  
Time Course ◽  
Energy Use ◽  
Mechanical Performance ◽  
Myocardial Damage ◽  
Physiological Saline ◽  
Left Ventricular ◽  
Papillary Muscles ◽  
Cross Sectional ◽  
Butanedione Monoxime

A number of studies have used 2,3-butanedione monoxime (BDM) to avoid myocardial damage when small muscle preparations were cut from large hearts. The present study investigates the mechanical and energetic effects of varying muscle cross-sectional area (CSA) by dissection in physiological saline containing BDM. By use of adult rat hearts, three muscle groups were obtained: whole left ventricular papillary muscles (Whole) and left ventricular papillary muscles split longitudinally in the presence of 30 mM BDM, with removal of approximately 10% (BDMSP1) or 40-50% (BDMSP2) of the muscle (5 animals in each group). The isolated muscle preparations were studied at 27 degrees C and stimulated at 0.167 Hz. The Whole and BDMSP1 preparations had comparable CSAs; in isotonically contracting muscles working against a range of afterloads, work, enthalpy (energy use), and mechanical efficiency (work/enthalpy x 100%) were similar for the two groups. In addition, isometric performance [e.g., developed stress (force/CSA), length-tension relationship, and contraction time course] was also similar for the two groups. The thinner BDMSP2 preparations showed an enhanced mechanical performance compared with the Whole and BDMSP1 groups. This outcome was in accordance with data in the literature documenting a negative correlation between stress and CSA. The results suggest that BDM-split and intact papillary muscles of similar CSA have comparable energetic and mechanical properties.

scholarly journals EFFECT OF TIO2 NANOPARTICLES IN NI MATRIX ON MECHANICAL AND CORROSION RESISTANCE PROPERTIES

2017 ◽  
Vol 23 (1) ◽  
pp. 37 ◽  
Author(s):  
Amer Mekkaoui ◽  
Shahnez Saied ◽  
Okba Belahssen ◽  
Abdelouahed Chala
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Crystallite Size ◽  
Nanocomposite Coating ◽  
Corrosion Property ◽  
Hard Coatings ◽  
Nanocomposite Coatings ◽  
Nacl Solution ◽  
High Concentration ◽  
Corrosion Properties

<p class="AMSmaintext">Nickel (Ni) is one of the most important hard coatings. Improvement in its tribological and mechanical properties would greatly enhance its use in industry. Nanocomposite coatings of metals with various reinforced nanoparticles have been developed in last few decades. Titania (TiO<sub>2</sub>) exhibit excellent mechanical properties. It is believed that TiO<sub>2</sub> incorporation in Ni matrix will improve the properties of Ni coatings significantly. The main purpose of the current work is to investigate the mechanical and anti-corrosion properties of the electroplated Nickel nanocomposite with a different percentage of TiO<sub>2</sub>. The results showed that the content of TiO<sub>2</sub> and the microhardness in the Ni-TiO<sub>2</sub> coatings first increased and reached the maximum at the loading of 20 g/L, then decreased, due to agglomeration of dioxide of Titania for high concentration of TiO<sub>2</sub>. The [200] preferred orientation for Ni pure gradually evolved to [111] orientation with increasing TiO<sub>2</sub> nanoparticle loading. At 20 g/L of TiO<sub>2</sub> we obtained the minimum crystallite size (27 nm). The anti-corrosion property of nanocomposite coating was carried out in 3.5 % NaCl solution and the result also showed that the nanocomposite coatings improve the corrosion resistance significantly. This present work reveals that incorporation of TiO<sub>2</sub> in nickel nanocomposite coating can improved corrosion resistance and mechanical properties of both hardness and corrosion resistance performances, and the improvement becomes at it maximum for 20 g/L of TiO<sub>2</sub>.</p>

Properties of Ni–ZrO2 nanocomposite coatings by electroplating

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940024
Author(s):  
Chao Xiong ◽  
Jin Xiao ◽  
Yu Zhao ◽  
Yuxin Wang ◽  
See Leng Tay ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Surface Morphology ◽  
Composite Coatings ◽  
Nanocomposite Coatings ◽  
Wear Property ◽  
Nanoparticles Concentration ◽  
Microstructure And Mechanical Property ◽  
Wear Tests

The microstructure, microhardness and wear property of electroplated Ni–ZrO2 nanocomposite coatings with different ZrO2 concentration were analyzed using SEM, microhardness and wear tests. It was found that in the composite coatings, incorporation of ZrO2 particles improves the mechanical property of Ni coatings and the effect of ZrO2 nanoparticles concentration on the surface morphology, microstructure and mechanical property of electroplated coatings was discussed. The mechanical properties of Ni–ZrO2 coatings reach the optimum value when the ZrO2 concentration is 10 g/L.

scholarly journals Performance characterization of multifunctional different cross-sectional-shaped coaxial composite filaments for SMART textile applications

2018 ◽  
Vol 48 (6) ◽  
pp. 1059-1080 ◽  
Author(s):  
Ali Afzal ◽  
Omar Harzallah ◽  
Jean-Yves Drean ◽  
Niaz-Ahmad Akhtar ◽  
Sheraz Ahmad
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Design Parameters ◽  
Sensors And Actuators ◽  
Cross Sectional ◽  
Smart Textile ◽  
Sectional Shape ◽  
Applied Stresses ◽  
Metal Polymer

The aim of this study is to investigate the effect of spinneret design parameters on cross-sectional shape and mechanical performance characteristics of coaxial composite filaments. A number of different cross-sectional-shaped metal/polymer core/sheath coaxial composite filaments were developed by changing spinneret design parameters. The cross-sectional shapes obtained were circular, rectangular, triangular and elliptical shapes. The mechanical performance of filaments was evaluated for application in sensors and actuators. The change of cross-sectional shape significantly influences mechanical properties of developed filaments which express their vulnerability during applied stresses in their life cycle.

The microstructure and mechanical properties of Ni–Co–ZrO2 nanocomposite coatings

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744022 ◽  
Author(s):  
Yuxin Wang ◽  
Bo Hu ◽  
See Leng Tay ◽  
Fengyan Hou ◽  
Wei Gao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Nanocomposite Coating ◽  
Nanocomposite Coatings ◽  
Porous Coating ◽  
Strengthening Effect ◽  
Dispersion Strengthening ◽  
Particle Agglomeration ◽  
Coating Structure ◽  
Microstructure And Mechanical Properties ◽  
Plating Solution

Ni–Co–ZrO2 nanocomposite coatings have been electroplated on mild steel by adding ZrO2 nanoparticles into an Ni–Co plating solution. The microstructure and mechanical properties of nanocomposite coatings were systematically investigated. The results show that the microhardness of Ni–Co–ZrO2 nanocomposite coatings varied significantly with the quantity of ZrO2 nanoparticles. Ni–Co–10 g/L ZrO2 nanocomposite coating exhibited the optimum mechanical properties due to the dispersion strengthening effect. Addition of ZrO2 nanoparticles beyond 10 g/L led to particle agglomeration and caused a porous coating structure, resulting in a deterioration of coating mechanical properties.

Sign in / Sign up

Export Citation Format

Share Document