Investigation on the relationship between NbC and wear-resistance of Fe matrix composite coatings with different C contents

2018 ◽  
Vol 439 ◽  
pp. 468-474 ◽  
Author(s):  
Changchun Zhao ◽  
Yefei Zhou ◽  
Xiaolei Xing ◽  
Sha Liu ◽  
Xuejun Ren ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Matrix Composite ◽  
Composite Coatings ◽  
The Relationship

The Relationship between Nanocrystalline Structure and Frictional Properties of Nanodiamond/Ni Composite Coatings by Brush Plating

2011 ◽  
Vol 80-81 ◽  
pp. 683-687 ◽  
Author(s):  
Ying Li ◽  
Bian Xiao Li ◽  
Wen Jun Zou
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Nanocrystalline Structure ◽  
Work Piece ◽  
Reciprocating Motion ◽  
Frictional Properties ◽  
Second Phases ◽  
Brush Plating ◽  
The Relationship

Nanodiamond/Ni and Ni coatings were fabricated via brush plating. Nanocrystalline structure of the composite coating was investigated by SEM and XRD. The results showed that the composite coatings are nanocrystalline structure. The hardness of the nanodiamond/Ni composite coating is higher greatly than that of Ni coating. At same time, the reasons of formation nanocrystalline were discussed, which include the nucleation rate with the increase of a high over-potential, the reciprocating motion between brush and work piece, the heterogeneous nucleation of nanodiamond. The nanodiamonds as second phases make grain finer. The nanodiamonds of core-shell structure play the important role in wear resistance and antifriction. So the wear resistance of the composite coatings is significantly higher than nickel coating’s.

The Wear Behavior of Pulse Current Electroforming Ni-P-SiC Composite Coatings

2007 ◽  
Vol 364-366 ◽  
pp. 358-363 ◽  
Author(s):  
Kung Hsu Hou ◽  
Ming Chang Jeng ◽  
Yung Kang Shen ◽  
Ming Der Ger
Keyword(s):  
Weight Loss ◽  
Wear Resistance ◽  
Pulse Current ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Wear Weight Loss ◽  
Sic Particles ◽  
The Coefficient Of Friction ◽  
Worn Surface ◽  
The Relationship

In this study, the SiC particles with a mean diameter of 300nm were used to be codeposited with Ni-P base to produce Ni-P-SiC composite coatings by means of the pulse current electroforming technology. The relationship between the SiC particles and phosphorous contents in the composite coatings has been constructed. The wear behavior of the Ni-P-SiC composite coatings was examined by that measurements data including the wear weight loss, the coefficient of friction, and the temperature increments under the wear tests, in which were correlated to the observation and analysis of the worn surface of the composite coatings. Experimental results show that the wear resistance of Ni-P-SiC composite coatings is superior to Ni-P composite coatings, if they are under the same level of hardness. In addition, the wear weight loss of Ni-P-SiC composite coatings is even about 62% less than that of Ni-P composite coatings, if they are based on the same production conditions. Further more, both the hardness and wear resistance of Ni-P-SiC composite coatings are superior to pure Ni coating, wherein its wear resistance is even up to 10 times better than that of pure Ni coating.

Dry Sliding Wear Behavior of Laser Clad WC/NiCrBSi Metal Matrix Composite Coatings

2013 ◽  
Vol 690-693 ◽  
pp. 3327-3333
Author(s):  
Jiao Xi Yang ◽  
Xuan He Miao
Keyword(s):  
Wear Resistance ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Dry Sliding Wear ◽  
Different Types ◽  
Worn Surfaces

Different types of WC/NiCrBSi metal matrix composite coatings were deposited by laser cladding. The wear resistance of these composite coatings was tested with a ring-on-disc (MMG-10) apparatus. The morphologies of the worn surfaces were observed using a scanning electron microscopy (SEM) equipped with an energy dispersive spectroscopy (EDS) for elemental composition. The results showed that the wear resistance of the laser clad WC/Ni-based composite coatings increased significantly with increasing WC mass fraction. It had also been suggested that the composite coating containing 60 wt% agglomerate WC had superior wear resistance property. The wear mechanism was then discussed on the basis of microscopic observations of the worn surfaces.

The Frictional Properties and Mechanism of Nano-Diamond/Ni Composite Coatings by Brush-Plating

2011 ◽  
Vol 291-294 ◽  
pp. 197-200 ◽  
Author(s):  
Ying Li ◽  
Wen Jun Zou ◽  
Bian Xiao Li ◽  
Qi Ming Dong
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Frictional Coefficient ◽  
Treatment Temperature ◽  
Maximum Hardness ◽  
Hardness Tester ◽  
Frictional Properties ◽  
Friction Tester ◽  
Relationship Of ◽  
The Relationship

The hardness and the wear resistance of the nano-diamond composite coatings were investigated by the micro-hardness tester and the friction tester. The relationship of the nano-diamond concentration, heat treatment temperature and hardness were revealed. These results show that the composite coatings have higher hardness, better wear resistance and lower friction coefficient under the uniform dispersing of the nano-diamond in the nickel matrix. The maximum hardness of the composite coatings reaches HV654 when the nano-diamond concentration is 30%. Frictional coefficient is decreased from 0.185 to 0.16. Moreover, the hardness does not reduce under annealing at 300°C. The frictional mechanism of the composite coatings indicates that the worn nano-diamond could block the direct contact between the composite coating and the standard ring. Spherical nano-diamond particles play the role in the "micro-ball" among the contact surfaces, the frictional coefficient is reduced and the wear resistance is improved.

scholarly journals Service properties of composite electrochemical coating

2021 ◽  
Vol 344 ◽  
pp. 01022
Author(s):  
E. M. Yudina ◽  
Yu. E. Kisel ◽  
M. R. Kadyrov ◽  
A. S. Serguntsov
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Composite Coatings ◽  
Dispersed Phase ◽  
Dispersed Particles ◽  
Coating Roughness ◽  
Electrochemical Coating ◽  
The Matrix ◽  
Composite Electrochemical Coating ◽  
The Relationship

The article considers the ways of solving problems, regarding the rework and durability improvement of elements of industrial equipment. One of the ways to restore and improve the operational properties of machinery parts is the application of galvanic coatings, in particular, composite galvanic coatings. The article shows ways to improve the performance properties of composites, determines the optimal content of the dispersed phase in the composite, in terms of the ratio of the strength of the dispersed phase and matrix. The composite electrochemical coating wear resistance and the roughness of composites under conditions of abrasive wear have been explored. The relationship between the wear resistance and the surface roughness during wear has been determined. In an experimental study of the composite coatings abrasive wear resistance, it was found that their wear largely depends on the size and volume content of dispersed particles in the coating. It has been experimentally proven that the composite coating roughness depends on the matrix mechanical properties, the content and size of disperse particles.

scholarly journals Electroplating of Chromium Incorporating High-Dispersion Black Carbon Particles

2021 ◽  
Vol 346 ◽  
pp. 02030
Author(s):  
S.V. Vodopyanova ◽  
G.G. Mingazova ◽  
R.E. Fomina ◽  
R.S. Sayfullin
Keyword(s):  
Wear Resistance ◽  
Black Carbon ◽  
Matrix Composite ◽  
Surface Hardening ◽  
Composite Coatings ◽  
High Dispersion ◽  
Optimal Conditions ◽  
Mixing Rate ◽  
Carbon Particles ◽  
Structural Parts

Electrochemical composite coatings allow successfully solving many practical problems of surface-hardening of structural parts and their tooling components, as well as renewing their fast-wearing components. Electrochemical chromium-matrix composite coatings are used to enhance the thermal and wear resistance of steel articles and parts operating in friction conditions and under increased temperatures, but under low shock loads. This paper presents the results obtained from studying how fine black carbon particles affect the properties of composite coatings. Optimal conditions are found for producing high-quality coatings, such as the suspended electrolyte mixing rate and graphite concentration in electrolyte. We have also studied how heat treatment affects the microhardness and surface morphology of coatings. High-dispersed black graphite can be used to produce chromium-matrix composite coatings having increased microhardness and wear resistance.

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