Electrochemical performance and corrosion mechanism of Cr–DLC coating on nitrided Ti6Al4V alloy by magnetron sputtering

2021 ◽  
pp. 108398
Author(s):  
Kong Weicheng ◽  
Yu Zhou ◽  
Hu Jun
Keyword(s):  
Magnetron Sputtering ◽  
Electrochemical Performance ◽  
Ti6al4v Alloy ◽  
Corrosion Mechanism ◽  
Dlc Coating

Crystallite size and microstrain: XRD line broadening analysis of AgSiN thin films

2019 ◽  
Vol 48 (6) ◽  
pp. 473-480 ◽  
Author(s):  
Umi Zalilah Mohamad Zaidi ◽  
A.R. Bushroa ◽  
Reza Rahbari Ghahnavyeh ◽  
Reza Mahmoodian
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Magnetron Sputtering ◽  
Crystallite Size ◽  
Approximation Method ◽  
Ti6al4v Alloy ◽  
Line Broadening ◽  
X Ray Diffraction ◽  
Content Type ◽  
Three Samples

Purpose This paper aims to determine the crystallite size and microstrain values of AgSiN thin films using potential approach called approximation method. This method can be used as a replacement for other determination methods such as Williamson-Hall (W-H) plot and Warren-Averbach analysis. Design/methodology/approach The monolayer AgSiN thin films on Ti6Al4V alloy were fabricated using magnetron sputtering technique. To evaluate the crystallite size and microstrain values, the thin films were deposited under different bias voltage (−75, −150 and −200 V). X-ray diffraction (XRD) broadening profile along with approximation method were used to determine the crystallite size and microstrain values. The reliability of the method was proved by comparing it with scanning electron microscopy graph and W-H plot method. The second parameters’ microstrain obtained was used to project the residual stress present in the thin films. Further discussion on the thin films was done by relating the residual stress with the adhesion strength and the thickness of the films. Findings XRD-approximation method results revealed that the crystallite size values obtained from the method were in a good agreement when it is compared with Scherer formula and W-H method. Meanwhile, the calculations for thin films corresponding residual stresses were correlated well with scratch adhesion critical loads with the lowest residual stress was noted for sample with lowest microstrain and has thickest thickness among the three samples. Practical implications The fabricated thin films were intended to be used in antibacterial applications. Originality/value Up to the knowledge from literature review, there are no reports on depositing AgSiN on Ti6Al4V alloy via magnetron sputtering to elucidate the crystallite size and microstrain properties using the approximation method.

Improved electrochemical performance of LiCoO2 electrodes for high-voltage operations by Ag thin film coating via magnetron sputtering

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3513-3518 ◽  
Author(s):  
Taner Zerrin ◽  
Mihri Ozkan ◽  
Cengiz S. Ozkan
Keyword(s):  
Thin Film ◽  
Magnetron Sputtering ◽  
Electrochemical Performance ◽  
High Voltage ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Interface Layer ◽  
Li Ion Batteries ◽  
Electrode Structure ◽  
Li Ion

ABSTRACTIncreasing the operation voltage of LiCoO2 (LCO) is a direct way to enhance the energy density of the Li-ion batteries. However, at high voltages, the cycling stability degrades very fast due to the irreversible changes in the electrode structure, and formation of an unstable solid electrolyte interface layer. In this work, Ag thin film was prepared on commercial LCO cathode by using magnetron sputtering technique. Ag coated electrode enabled an improved electrochemical performance with a better cycling capability. After 100 cycles, Ag coated LCO delivers a discharge capacity of 106.3 mAh g-1 within 3 - 4.5 V at C/5, which is increased by 45 % compared to that of the uncoated LCO. Coating the electrode surface with Ag thin film also delivered an improved Coulombic efficiency, which is believed to be an indication of suppressed parasitic reactions at the electrode interface. This work may lead to new methods on surface modifications of LCO and other cathode materials to achieve high-capacity Li-ion batteries for high-voltage operations.

Mesoporous Fe3O4@C submicrospheres evolved by a novel self-corrosion mechanism for high-performance lithium-ion batteries

2014 ◽  
Vol 38 (6) ◽  
pp. 2428-2434 ◽  
Author(s):  
Yongping Gan ◽  
Huaqing Gu ◽  
Han Xiao ◽  
Yang Xia ◽  
Xinyong Tao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Structural Stability ◽  
High Performance ◽  
Lithium Ion ◽  
High Conductivity ◽  
Corrosion Mechanism

Mesoporous Fe3O4@C submicrospheres with high conductivity and structural stability exhibit fascinating electrochemical performance.

scholarly journals Sliding Wear Behaviour and Corosion Resistance to Ringer’s Solution of Uncoated and DLC Coated X46Cr13 Steel

2016 ◽  
Vol 61 (4) ◽  
pp. 1895-1900 ◽  
Author(s):  
M. Scendo ◽  
N. Radek ◽  
J. Konstanty ◽  
K. Staszewska
Keyword(s):  
Sliding Wear ◽  
Oxidation Kinetic ◽  
Wear Test ◽  
Wear Behaviour ◽  
Corrosion Mechanism ◽  
Wear Properties ◽  
Ringer’S Solution ◽  
Dlc Coating ◽  
Resistance To Sliding ◽  
Sliding Wear Behaviour

Abstract Sliding wear properties and corrosion resistance in Ringer’s solution of uncoated and diamond-like carbon (DLC) coated X46Cr13 steel was tested. The Raman spectra showed that the DLC film was successfully coated by plasma assisted CVD method onto the steel surface. The wear test, carried out using a ball-on disk tribometer, revealed that the DLC coating show better resistance to sliding wear and lower friction coefficient against a 100Cr6 steel ball than five times softer X46Cr13 steel. The oxidation kinetic parameters were determined by means of both the gravimetric and electrochemical method. It was found that the DLC coating markedly decreased the rate of corrosion of the X46Cr13 steel, irrespective of the corrosion mechanism involved.

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