Effect of Coating Thickness on Tribological Performance of CrN in Dry Sliding Contact

2012 ◽  
Author(s):  
C. Lorenzo Martin ◽  
O. O. Ajayi ◽  
S. Torrel ◽  
N. Demas ◽  
A. Erdemir ◽  
...  
Keyword(s):  
Coating Thickness ◽  
Friction And Wear ◽  
Steel Substrate ◽  
Friction Behavior ◽  
Wear Performance ◽  
Thin Film Coatings ◽  
Sliding Test ◽  
Forming Tools ◽  
Thick Coatings ◽  
Crn Coatings

One of the most commonly used tribological thin-film coatings is Chromium Nitride (CrN), typically deposited by PVD process. Examples of current applications of this coating include cutting and forming tools: ICE piston ring, hydrodynamic pumps, etc. In selecting coating for tribological applications, one of the critical parameter is the coating thickness. In the present work, we experimentally studied the effect of coating thickness on friction and wear performance of CrN coatings under unidirectional sliding. Test were conducted with ∼ 1, 5 and 10 microns thick coatings deposited on a hardened H-13 steel substrate by plasma enhanced magnetron sputtering (PEMS) process. The friction behavior was strongly dependent on coating thickness, especially at relatively low loads. At higher load however, the thinner coating (1 μm) was quickly worn through while the thicker ones (5 and 10 μm) remained intact. Wear in both, the counterface WC material and the coating was also observed to depend on coating thickness. The observed effect on coating thickness on tribological behavior is attributed to differences in the microstructure and mechanical behaviors of coatings as function of thickness.

scholarly journals Friction Behavior of a Textured Surface against Several Materials under Dry and Lubricated Conditions

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5228
Author(s):  
Linqing Bai ◽  
Jianxin Sun ◽  
Pengcheng Zhang ◽  
Zulfiqar Ahmad Khan
Keyword(s):  
Friction And Wear ◽  
Friction Pair ◽  
Design Guidelines ◽  
Operating Conditions ◽  
Textured Surface ◽  
Friction Behavior ◽  
Positive Role ◽  
Wear Performance ◽  
Frictional Behavior ◽  
Texture Parameters

This paper reports research on the frictional behavior of a textured surface against several materials under dry and lubricated conditions, and this is aimed to provide design guidelines on the surface texturing for wide-ranging industrial applications. Experiments were performed on a tribo-tester with the facility of simulating A ball-on-plate model in reciprocating motion under dry, oil-lubricated, and water-lubricated conditions. To study the frictional behavior of textured SiC against various materials, three types of ball-bearing –elements, 52100 steel, silicon nitride (Si3N4), and polytetrafluoroethylene (PTFE), were used. Friction and wear performance of an un-textured surface and two types of widely used micro-scale texture surfaces, grooves and circular dimples, were examined and compared. The results demonstrated that the effect of surface textures on friction and wear performance is influenced by texture parameters and the materials of friction pairs. The circular-dimple texture and the groove texture, with certain texture parameters, played a positive role in improving friction and wear performance under specific operating conditions used in this research for SiC–steel and SiC–Si3N4 friction pairs; however, there was no friction and wear improvement for the textured SiC–PTFE friction pair. The results of this study offer an understanding and a knowledge base to enhance the performance of bearing elements in complex interacting systems.

THE EFFECT OF RESIDUAL STRESS ON THE LOAD BEARING CAPACITY OF PVD COATED SURFACES – PART 2

Tribologia ◽  
2019 ◽  
Vol 287 (5) ◽  
pp. 43-49
Author(s):  
Kinga CHRONOWSKA-PRZYWARA ◽  
Marcin KOT ◽  
Marcin SZCZĘCH
Keyword(s):  
Residual Stress ◽  
Coating Thickness ◽  
Steel Substrate ◽  
Critical Force ◽  
Load Range ◽  
Diamond Indenter ◽  
Strong Relation ◽  
Coated Surfaces ◽  
Tip Radius ◽  
Crn Coatings

The article presents the results of modelling tests of the coating-substrate systems subjected to a contact load using a spherical diamond indenter with a 20 μm tip radius. Systems with 1 to 5 μm thick CrN coatings deposited on X5CrNi18-10 austenitic steel substrate were analysed. Systems without residual stress as well as with introduced 2 and 5 GPa compressive residual stresses were analysed. The article presents the effect of coating thickness on substrate deformations at load range up to 1 and 3 N. The evolution of maximum radial stress in the substrate and the range of substrate plastic deformation for the assumed coating thicknesses were also analysed. Modelling results showed a strong relation between maximum critical force and relative coating thickness. The maximum radial stresses in the substrate in a case of systems with a thin 1 μm coating are much smaller than for thicker 5 μm coating, referring to the relative coating thickness. However, the analysis of substrate yielding showed that, for thin 1 and 2 μm coatings, substrates deform plastically at 0.01 and 0.03 N, respectively, while the 5 μm coating prevent plastic deformations up to load 0.32N.

Friction and wear performance of a copper-based bond emery wheel for rail grinding

2020 ◽  
Vol 62 (12) ◽  
pp. 1205-1214
Author(s):  
Lu-cheng Cai ◽  
Xiao-song Jiang ◽  
Yu-cheng Guo ◽  
Da-ming Sun ◽  
Xing-long Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Wear Performance ◽  
Rail Grinding

Effect of temperature on the friction and wear performance of porous oil-containing polyimide

2021 ◽  
Vol 157 ◽  
pp. 106891
Author(s):  
Hongwei Ruan ◽  
Yaoming Zhang ◽  
Song Li ◽  
Lijun Yang ◽  
Chao Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Effect Of Temperature ◽  
Wear Performance

Oil-soluble ionic liquid to lubricate silicon

2021 ◽  
pp. 135065012098488
Author(s):  
Waleed Al-Sallami ◽  
Pourya Parsaeian ◽  
Abdel Dorgham ◽  
Anne Neville
Keyword(s):  
Ionic Liquid ◽  
High Temperature ◽  
Friction And Wear ◽  
Tribological Performance ◽  
Considerable Reduction ◽  
Zinc Dialkyldithiophosphate ◽  
Lubrication Mechanism ◽  
Wear Coefficient ◽  
Wear Performance ◽  
Micro Scale

Trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate (phosphonium phosphate) ionic liquid is soluble in non-polar lubricants. It has been proposed as an effective anti-wear additive comparable to zinc dialkyldithiophosphate. Previously, phosphonium phosphate has shown a better anti-wear performance under some conditions such as high temperature. In this work, the tribological performance and the lubrication mechanism of phosphonium phosphate are compared with that of zinc dialkyldithiophosphate when lubricating silicon under various tribological conditions. This can lead to an understanding of the reasons behind the superior anti-wear performance of phosphonium phosphate under some conditions. A micro-scale study is conducted using a nanotribometer. The results show that both additives lead to a considerable reduction in both friction and wear coefficients. The reduction in the wear coefficient is mainly controlled by the formation of the tribofilm on the rubbing surfaces. Zinc dialkyldithiophosphate can create a thicker tribofilm, which results in a better anti-wear performance. However, the formation of a thicker film will lead to a faster depletion and thus phosphonium phosphate can provide better anti-wear performance when the depletion of zinc dialkyldithiophosphate starts.

Effect of transfer layers on friction and wear mechanisms in strip drawing tests of commercially coated forming tools

Wear ◽  
2021 ◽  
pp. 203733
Author(s):  
A.F. Tavares ◽  
A.P.O. Lopes ◽  
E.A. Mesquita ◽  
D.T. Almeida ◽  
J.H.C. Souza ◽  
...  
Keyword(s):  
Wear Mechanisms ◽  
Friction And Wear ◽  
Friction And Wear Mechanisms ◽  
Strip Drawing ◽  
Forming Tools

Friction and Wear Performance of Tetraalkylammonium Thiomolybdates in Aqueous Solutions

2008 ◽  
Vol 51 (4) ◽  
pp. 526-532 ◽  
Author(s):  
J. Lara-Romero ◽  
F. Chiñas-Castillo ◽  
G. Alonso-Núñez ◽  
Y. Gochi-Ponce
Keyword(s):  
Aqueous Solutions ◽  
Friction And Wear ◽  
Wear Performance

A comparative study of the friction and wear performance of Fe-based bulk metallic glass under different conditions

2017 ◽  
Vol 69 (6) ◽  
pp. 919-924
Author(s):  
Dawit Zenebe Segu ◽  
Pyung Hwang
Keyword(s):  
Metallic Glass ◽  
Abrasive Wear ◽  
Bulk Metallic Glass ◽  
Friction And Wear ◽  
Deionized Water ◽  
Wear Scar ◽  
Dry Sliding ◽  
Wear Performance ◽  
Content Type ◽  
Conventional Material

Purpose This study aims to compare the friction and wear behaviors of Fe68.3C6.9Si2.5 B6.7P8.8Cr2.2Al2.1Mo2.5 bulk metallic glass (BMG) under sliding using dry, deionized water-lubricated and oil-lubricated conditions. The comparison was performed using a unidirectional ball-on-flat tribometer under different applied loads, and the results were compared to the properties of a conventional material, SUJ2. Fe-based BMG materials have recently been attracting a great deal of attention for prospective engineering applications. Design/methodology/approach As a part of the development of Fe-based BMGs that can be cost-effectively produced in large quantities, an Fe-based BMG Fe68.8C7.0Si3.5B5.0P9.6 Cr2.1Mo2.0Al2.0 with high glass forming ability was fabricated. In the present study, the friction and wear properties of Fe-based BMG has been comparatively evaluated under dry sliding, deionized water- and oil-lubricated conditions using a unidirectional ball-on-flat tribometer under different applied loads, and the results were compared to the properties of conventional material SUJ2. Findings The results show that the Fe-based BMG had better friction performance than the conventional material. Both the friction coefficient and wear mass loss increased with increasing load. The sliding wear mechanism of the BMG changed with the sliding conditions. Under dry sliding conditions, the wear scar of the Fe-based BMG was characterized by abrasive wear, plastic deformation, micro-cracks and peeling-off wear. Under water- and oil-lubricated conditions, the wear scar was mainly characterized by abrasive wear and micro-cutting. Originality/value In this investigation, the authors developed a new BMG alloy Fe68.8C7.0Si3.5B5.0P9.6Cr2.1Mo2.0Al2.0 to improve the friction and wear performance under dry sliding, deionized water- and oil- lubricated conditions.

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