Proposals for the ISS: «Penta-Tribos» Experiment - Study of the adequacy of the friction and wear data obtained for antifriction and wear-resistant materials directly in space at orbital stations and in laboratory conditions

2000 ◽  
Vol 6 (4) ◽  
pp. 44-44 ◽  
Author(s):  
G.D. Gamulya ◽  
O.L. Ostrovska ◽  
T.P. Yukhno
Keyword(s):  
Friction And Wear ◽  
Experiment Study ◽  
Wear Resistant ◽  
Laboratory Conditions

Self-Lubricating and Wear Resistant Epoxy Composites Incorporated With Microencapsulated Wax

2014 ◽  
Vol 81 (7) ◽  
Author(s):  
N. W. Khun ◽  
H. Zhang ◽  
C. Y. Yue ◽  
J. L. Yang
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Normal Load ◽  
Wear Test ◽  
Epoxy Composites ◽  
Wear Resistant ◽  
Working Parameters

Self-lubricating and wear resistant epoxy composites were developed via incorporation of wax-containing microcapsules. The effects of microcapsule size and content and working parameters on the tribological properties of epoxy composites were systematically investigated. The incorporation of microcapsules dramatically decreased the friction and wear of the composites from those of the epoxy. The increased microcapsule content or the incorporation of larger microcapsules decreased the friction and wear of the epoxy composites due to the larger amount of released wax lubricant via the rupture of microcapsules during the wear test. The friction of the composites decreased with increased normal load as a result of the promoted wear of the composites and the increased release of the wax lubricant.

scholarly journals Microstructures and high-temperature self-lubricating wear-resistance mechanisms of graphene-modified WC-12Co coatings

Friction ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 315-331 ◽  
Author(s):  
Haoliang Tian ◽  
Changliang Wang ◽  
Mengqiu Guo ◽  
Yongjing Cui ◽  
Junguo Gao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Friction Coefficient ◽  
Adhesive Strength ◽  
Friction And Wear ◽  
Resistance Mechanisms ◽  
High Temperature Treatment ◽  
Wear Properties ◽  
Powder Preparation ◽  
Wear Resistant

AbstractTo reduce the friction coefficient of cobalt-cemented tungsten carbide (WC-12Co) wear-resistant coatings, graphene was compounded into WC-12Co powder via wet ball milling and spray granulation. Self-lubricating and wear-resistant graphene coatings were prepared via detonation gun spraying. The presence, morphologies, and phase compositions of graphene in the powders and coatings that are obtained through different powder preparation processes were analyzed. The analysis was performed using the following technologies: energy-dispersive X-ray-spectroscopy (EDXS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. The mechanical properties of the coatings were studied using a microhardness tester and a universal drawing machine. The friction and wear properties of the coatings were studied using an SRV-4 friction and wear tester. The results showed that the graphene content in the WC-12Co coating modified with graphene was higher than that without modification; graphene was embedded in the structure in a transparent and thin-layer state. The adhesive strength of this coating at approximately 25 °C was approximately 60.33 MPa, and the hardness was approximately 984 HV0.3. After high-temperature treatment, the adhesive strength and hardness of the graphene oxide (GO)/WC-12Co coating decreased slightly (the lowest adhesive strength of 53.16 MPa was observed after treatment at 400 °C, and the lowest hardness of approximately 837 HV0.3 was observed after treatment at 300 °C). Compared to the friction coefficient (0.6) of the WC-12Co coating obtained at room temperature, the friction coefficient of the GO/WC-12Co coating was decreased by approximately 50% of that value. The graphene-modified coating was continuously exposed to the wear tracks on the surface of the contacting materials during friction, and a lubricating film was formed in the microareas in which the wear tracks were present. The coating exhibited improved self-lubricating and wear-resistant effects compared to the unmodified WC-12Co coating. The results of this study demonstrated that graphene could be effective in self-lubrication and wear-reduction in a temperature range of 100–200 °C, as a friction coefficient of 0.3 was maintained.

Processing Steels for Tribological Applications by Titanium Implantation

1983 ◽  
Vol 27 ◽  
Author(s):  
I.L. Singer ◽  
R.A. Jeffries
Keyword(s):  
Friction And Wear ◽  
Cutting Tools ◽  
Normal Incidence ◽  
Curved Surfaces ◽  
Combined Effects ◽  
Wear Resistant ◽  
Tribological Surfaces ◽  
Duty Cycles ◽  
Carburized Layer

ABSTRACTTitanium implantation into steels has been shown to produce superior tribological surfaces. The fluence required to produce a wear resistant surface increases from 2 to 5×1017 Ti/cm2 as the energy increases from 50 to 200 keV/ion. On curved surfaces (e.g., bearings, cutting tools, etc.) higher fluences are necessary due to effects of implantation at angles off normal incidence (i.e. the combined effects of higher sputtering rates, decreased range, and changes in the carburization process associated with duty cycles). Significant improvements in friction and wear have also been observed for surfaces which have been abraded by 600 and 120 grit SiC prior to implantation. Optimal benefits of Ti-implantation are associated with the formation of a modestly thick (>20nm) fully carburized layer.

How Third-Body Processes Affect Friction and Wear

MRS Bulletin ◽  
1998 ◽  
Vol 23 (6) ◽  
pp. 37-40 ◽  
Author(s):  
Irwin L. Singer
Keyword(s):  
Wear Resistance ◽  
Shear Strength ◽  
Friction And Wear ◽  
High Hardness ◽  
Rolling Contact ◽  
Sliding Contact ◽  
Third Body ◽  
Talcum Powder ◽  
Great Cost ◽  
Wear Resistant

Materials designed for rolling or sliding contact, like corrosion-resistant materials, can provide great cost savings to industry. So why can't such “tribomaterials” be designed based on materials properties that control friction and wear? In recent years, it has become clear that the properties we need to understand are not only those of the starting materials—whether bulk solids or engineered surfaces—but also those of the materials generated within the sliding (or rolling) contact, the so-called “third-body” materials. This article reviews third-body processes and their role in controlling friction and wear of practical surface treatments.It may seem odd that properties like slipperiness and wear resistance can be easily described but are not scientifically understood. We can feel that polytetrafluoroethylene is slippery but know that it is not very wear-resistant because we can scratch it with a fork. We can sense low friction when we rub talcum powder between our fingers but know it cannot lubricate indefinitely because it gets ejected as we rub. Is it contradictory to ask for materials that are both slippery and wear-resistant? Slipperiness is associated with low shear strength whereas wear resistance is modeled on high hardness—that is, high shear strength. Before we can answer this seeming contradiction, it is useful to review some aspects of friction and wear.More than 50 years ago, Bowden and Tabor explained how a low shearstrength film can reduce the friction coefficient between two higher shearstrength materials in sliding contact.

scholarly journals Development of low-friction and wear-resistant surfaces for low-cost Al hot stamping tools

2015 ◽  
Vol 21 ◽  
pp. 05009 ◽  
Author(s):  
Y. Dong ◽  
D. Formosa ◽  
J. Fernandez ◽  
X. Li ◽  
G. Fuentes ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Low Cost ◽  
Hot Stamping ◽  
Low Friction ◽  
Wear Resistant

Low friction and wear resistant a-C:H/a-Si1−xCx:H multilayer coatings

1996 ◽  
Vol 86-87 ◽  
pp. 617-621 ◽  
Author(s):  
J. Meneve ◽  
E. Dekempeneer ◽  
W. Wegener ◽  
J. Smeets
Keyword(s):  
Friction And Wear ◽  
Multilayer Coatings ◽  
Low Friction ◽  
Wear Resistant

Friction and Wear Behavior of Sucker Rod and Tubing String in the Presence of Oil Field Wastewater as the Lubricating Medium

2010 ◽  
Vol 156-157 ◽  
pp. 1343-1346
Author(s):  
Han Xiang Wang ◽  
Nai He Hou ◽  
Yan Xin Liu
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Wear Resistant Coating ◽  
Frictional Pair ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Resistant Coating ◽  
Adhesion Wear ◽  
Sucker Rod ◽  
Tubing String

An MG-2000 high-speed and high-temperature friction-abrasion testing machine was used to evaluate the friction and wear behaviors of AISI1045 steel sucker rod sliding against J55 tubing string and J55 tubing strings coated with spray-welded wear-resistant coatings of various thicknesses in a ring-on-ring configuration and under the lubrication of oilfield wastewater as the lubricating medium. The worn surface morphologies of the sucker rod specimens coupled with the J55 tubing string and the J55 tubing string coated with the wear-resistant coating were observed with a scanning electron microscope. As the results, it was effective to increase the wear-resistance of the frictional pair with the addition of the wear-resistant coatings on the tubing string surface. The wear-resistant coating of a proper thickness also contributed to reducing the friction coefficient to some extent, which was helpful to reduce the friction force between the sucker rod and tubing string pair and increase the service lifetime of the pair. The decreased wear rates of the sucking rod specimens coupled with the tubing string specimens coated with the wear-resistant coating of a proper thickness were attributed to the action of the coating in decreasing adhesion wear. Moreover, the tubing string specimen recorded little difference in wear rate at normal temperature and 60°C. However, the sucker rod specimen registered as lightly larger wear rate at 60°C than at room temperature, which could be attributed to the enhanced adhesion wear and mild corrosive wear at elevated temperature. It was imperative to properly control the thickness of the wear-resistant coating on the tubing string surface so as to bring its friction-reducing and antiwear action into effect.

The electrodeposition and characterisation of low-friction and wear-resistant Co-Ni-P coatings

2013 ◽  
Vol 235 ◽  
pp. 495-505 ◽  
Author(s):  
C. Ma ◽  
S.C. Wang ◽  
L.P. Wang ◽  
F.C. Walsh ◽  
R.J.K. Wood
Keyword(s):  
Friction And Wear ◽  
Low Friction ◽  
Wear Resistant

Experimental research on improving the wear resistance and anti-friction properties of drill pipe joints

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhiqiang Huang ◽  
Zhongquan Yin ◽  
Wei Wu
Keyword(s):  
Wear Resistance ◽  
Friction And Wear ◽  
Drilling Fluid ◽  
Drill Pipe ◽  
Flame Spray ◽  
Wear Resistant ◽  
Content Type ◽  
Pipe Joints ◽  
Friction Performance ◽  
Pipe Joint

Purpose The purpose of this study is to solve the oil drill pipe joints and casing excessive wear problems and to improve the drill pipe joint-casing wear resistance and anti-friction properties. Design/methodology/approach On the surface of the drill pipe joints using oxyacetylene flame bead weld (BW) wear-resistant welding wire ARNCO-100XTTM prepares welding layer, high-velocity oxygen fuel (HVOF) Cr3C275-NiCr25 prepares coating and subsonic flame spray and remelt (SFSR) Ni60 prepares coating, then comparing and analyzing the friction and wear of the three types of wear-resistant layers and the casing under the condition of 1.8 g/cm3 mud drilling fluid lubrication. The wear resistance and anti-friction performance of the drill pipe joints were evaluated based on the wear situation, finally revealing its friction and wear mechanisms. Findings Three types of wear-resistant layers can improve the surface wear resistance of drill pipe joints, the wear-resistant layer and the substrate are well combined and the welding layers and coating are both dense and uniform. The wear resistance of the HVOF-Cr3C275-NiCr25 coating is 10.9 times that of the BW-ARNCO-100XTTM weld layer, and the wear resistance of the SFSR-Ni60 weld layer is 2.45 times that of the BW-ARNCO-100XTTM weld layer. The anti-friction properties of SFSR-Ni60 welding layer is the best, followed by HVOF-Cr3C275-NiCr25 coating, and the anti-friction properties of BW-ARNCO-100XTTM welding layer is the worst among the three. Originality/value The research results of this paper have great practical value in the process and material of improving the wear resistance and anti-friction performance of the drill pipe joint casing.

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