Characterization of Cr–ZrO2 composite coatings electrodeposited from Cr(III) bath

The aim of this work was to incorporate ZrO2 particles into a Cr matrix within the research work aimed at obtaining metal matrix composite coatings (Cr–ZrO2) under direct current and to evaluate their protective properties. A Cr–ZrO2 composite coating was deposited from an electrolyte based on trivalent chromium sulphate with formate-urea as a complexing agent containing various concentrations of ZrO2. Cross-section investigations have revealed that ZrO2 particles incorporated into the Cr coating are uniformly distributed. The results indicate that ZrO2 particles influence the microhardness, morphology and corrosion behaviour of Cr–ZrO2 composite coatings obtained from the Cr(III) bath.

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Electrodeposition and Characterization of Cr-Fe-ZrO2 Composite Coating from Trivalent Chromium Chloride Electrolyte

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.3056 ◽

2011 ◽

Vol 239-242 ◽

pp. 3056-3061 ◽

Cited By ~ 3

Author(s):

Xiang Zhu He ◽

Xin Li Zhou ◽

Lin Yuan Huang

Keyword(s):

Composite Coating ◽

Composite Coatings ◽

Trivalent Chromium ◽

Complexing Agent ◽

Bending Tests ◽

Chromium Chloride ◽

Chloride Electrolyte ◽

Appearance Quality ◽

Nano Size

Cr-Fe-ZrO2composite coatings were electrodeposited in trivalent chromium chloride electrolyte containing glycine as complexing agent. The effects of electrodeposition parameters such as current density and electroplating time on appearance, surface morphology and composition of the Cr-Fe-ZrO2composite coatings were investigated mainly. The obtained Cr-Fe-ZrO2composite coatings were characterized by means of scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) techniques; the appearance quality was evaluated by range estimation; and the bonding force was analyzed by bending tests. The SEM results showed that the nano-size ZrO2powder were fairly distributed through out in the composite coating, and the composite coating contained only few fine cracks. The EDS results indicated that the composite coating contained chromium, iron, zirconium, oxygen, carbon and chlorine. The deposited coating was glossy and the results of bending tests showed that the bonding between the composite coating and the substrate was good

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Characterization of the Cr-C/Si 3 N 4 Composite Coatings Electroplated from a Trivalent Chromium Bath

Electrochimica Acta ◽

10.1016/j.electacta.2016.05.084 ◽

2016 ◽

Vol 209 ◽

pp. 244-253 ◽

Cited By ~ 9

Author(s):

Chia-Wen Liao ◽

Hung-Bin Lee ◽

Kung-Hsu Hou ◽

Shun-Yi Jian ◽

Chen-En Lu ◽

...

Keyword(s):

Composite Coatings ◽

Trivalent Chromium

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Electrodeposition and characterization of chromium-tungsten carbide composite coatings from a trivalent chromium bath

Surface and Interface Analysis ◽

10.1002/sia.2052 ◽

2005 ◽

Vol 37 (6) ◽

pp. 573-579 ◽

Cited By ~ 13

Author(s):

Z. Abdel Hamid ◽

I. M. Ghayad ◽

K. M. Ibrahim

Keyword(s):

Tungsten Carbide ◽

Composite Coatings ◽

Trivalent Chromium ◽

Carbide Composite ◽

Tungsten Carbide Composite

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Electro Co-deposition and Characterization of SiC in Nickel Metal Matrix Composite Coatings on Aluminium 7075

Procedia Engineering ◽

10.1016/j.proeng.2014.12.433 ◽

2014 ◽

Vol 97 ◽

pp. 1496-1505 ◽

Cited By ~ 15

Author(s):

S. Pradeep Devaneyan ◽

T. Senthilvelan

Keyword(s):

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Composite Coatings ◽

Nickel Metal

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HRTEM simulation of interfacial structure in amorphous multilayers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100154305 ◽

1989 ◽

Vol 47 ◽

pp. 466-467

Author(s):

Margaret L. Sattler ◽

Michael A. O'Keefe

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

Cross Section ◽

High Resolution Electron Microscopy ◽

Interfacial Structure ◽

Multilayer Sample ◽

Resolution Electron ◽

Multilayered Materials ◽

Simulated Images

Multilayered materials have been fabricated with such high perfection that individual layers having two atoms deep are possible. Characterization of the interfaces between these multilayers is achieved by high resolution electron microscopy and Figure 1a shows the cross-section of one type of multilayer. The production of such an image with atomically smooth interfaces depends upon certain factors which are not always reliable. For example, diffusion at the interface may produce complex interlayers which are important to the properties of the multilayers but which are difficult to observe. Similarly, anomalous conditions of imaging or of fabrication may occur which produce images having similar traits as the diffusion case above, e.g., imaging on a tilted/bent multilayer sample (Figure 1b) or deposition upon an unaligned substrate (Figure 1c). It is the purpose of this study to simulate the image of the perfect multilayer interface and to compare with simulated images having these anomalies.

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Physical Failure Analysis Techniques for Front-End-of-Line Defect Analysis

ISTFA 2016: Conference Proceedings from the 42nd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2016p0182 ◽

2016 ◽

Author(s):

Dirk Doyle ◽

Lawrence Benedict ◽

Fritz Christian Awitan

Keyword(s):

Cross Section ◽

Focused Ion Beam ◽

Ion Beam ◽

Gate Oxide ◽

Top Down ◽

New Techniques ◽

First Case ◽

Transmission Electron ◽

Scanning Transmission

Abstract Novel techniques to expose substrate-level defects are presented in this paper. New techniques such as inter-layer dielectric (ILD) thinning, high keV imaging, and XeF2 poly etch overflow are introduced. We describe these techniques as applied to two different defects types at FEOL. In the first case, by using ILD thinning and high keV imaging, coupled with focused ion beam (FIB) cross section and scanning transmission electron microscopy (STEM,) we were able to judge where to sample for TEM from a top down perspective while simultaneously providing the top down images giving both perspectives on the same sample. In the second case we show retention of the poly Si short after removal of CoSi2 formation on poly. Removal of the CoSi2 exposes the poly Si such that we can utilize XeF2 to remove poly without damaging gate oxide to reveal pinhole defects in the gate oxide. Overall, using these techniques have led to 1) increased chances of successfully finding the defects, 2) better characterization of the defects by having a planar view perspective and 3) reduced time in localizing defects compared to performing cross section alone.

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Studies and Research on the Corrosion Behavior of Ni-Al2O3 Compound Coatings Obtained by Electrochemical Methods

The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science ◽

10.35219/mms.2020.3.04 ◽

2020 ◽

Vol 43 (3) ◽

pp. 21-25

Author(s):

Simona BOICIUC ◽

◽

Keyword(s):

Corrosion Resistance ◽

Corrosion Behavior ◽

Corrosion Behaviour ◽

Composite Coatings ◽

Point Of View ◽

Electrochemical Methods ◽

Dispersed Phase ◽

Nickel Matrix ◽

Technical Alumina ◽

Compound Coatings

The undertaken research which is described in this paper aims at the corrosion behaviour of composite coatings in nickel matrix using as dispersed phase technical alumina with dimensions of 5 μm and their characterization from a microstructural point of view. The corrosion resistance in the saline fog of the coatings is influenced by the microstructure, the stresses developed in the layer and the roughness.

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