Wear Resistant Amorphous PVD B-N-C Films for Tribological Applications

1996 ◽  
Vol 441 ◽  
Author(s):  
O. Knotek ◽  
E. Lugscheider ◽  
C. Barimani ◽  
C. W. Siry
Keyword(s):  
European Community ◽  
Coefficient Of Friction ◽  
High Hardness ◽  
Wear Resistant ◽  
Ion Plating ◽  
Wear Protection ◽  
Pin On Disk ◽  
Reactive Mode

AbstractAmorphous B-N-C films with a variety of properties were deposited by PVD-magnetronsputter-ion-plating. Compared to nonconductive reactive r.f. BN-targets the semiconductive behaviour of specially produced B4C-targets permitted a d.c. reactive or non-reactive mode of deposition. These films are characterized by high hardness with decreased coefficient of friction. A tribological evaluation by modified pin-on-disk outline the wear protection effects in tribosystems with metal counter part. This work was partially financed by the Commission of the European Community under Brite/EuRam contract BRE2-CT93-0451.

scholarly journals Design of Wear-Resistant Diecast AlSi9Cu3(Fe) Alloys for High-Temperature Components

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 55 ◽  
Author(s):  
Giulio Timelli ◽  
Alberto Fabrizi ◽  
Simone Vezzù ◽  
Alessandro De Mori
Keyword(s):  
High Temperature ◽  
High Hardness ◽  
Wear Resistant ◽  
Fe Alloys ◽  
High Temperature Components ◽  
Alloy Softening ◽  
Pin On Disk ◽  
Iron Manganese ◽  
Image Analysis Techniques ◽  
Wear Tests

Type AlSi9Cu3(Fe) alloy has been modified by alloying with iron, manganese, and chromium elements to develop wear-resistant diecast hypoeutectic Al–Si–Cu alloys that can be applied for high-temperature applications. Several alloys have been produced by varying iron, manganese, and chromium levels (0.80, 1.00, 1.20 wt.% for Fe; 0.25, 0.40, 0.55 wt.% for Mn, and 0.06, 0.10 wt.% for Cr). Brinell hardness measurements and pin-on-disk wear tests have been conducted from room temperature up to 200 °C. The microstructural changes that occurred with the different alloying levels have been quantitatively examined by metallographic and image analysis techniques. The results showed how the increasing content of the Fe, Mn, and Cr promoted the precipitation of both primary and secondary Fe-enriched particles, mainly with polyhedral, blocky, and star-like morphologies. These compounds showed high hardness that is not affected by chemical composition and morphology variation. At high temperatures, the diecast alloys always showed lower average hardness and wear resistance, especially at 200 °C; however, a greater amount of Fe-rich particles can compensate the alloy softening.

A Study on the Arc Spraying of 7Cr13 Cored Wire and Tribological Properties of the Composite Coating

1998 ◽  
Author(s):  
B. Xu ◽  
S. Ma ◽  
J. Wang ◽  
J. Tan
Keyword(s):  
Bond Strength ◽  
Composite Coating ◽  
Tribological Properties ◽  
High Hardness ◽  
Wear Resistant Coating ◽  
Arc Spraying ◽  
Metallurgical Process ◽  
Cored Wire ◽  
Wear Resistant ◽  
Wire Arc Spraying

Abstract For the purpose of getting high hardness and high wear-resistant coating by arc spraying technology, the arc spraying of 7Cr13 cored wire is adopted in this paper. The metallurgical process of the cored wire arc spraying is discussed. The bond strength, hardness and tribological properties of the composite coating are investigated.

Wear Studies of Al2O3-ZrO2∙5CaO Composite Coatings for Tribological Applications

2018 ◽  
Vol 7 (3.4) ◽  
pp. 73
Author(s):  
Abhinav . ◽  
N Krishnamurthy ◽  
Ranjana Jain
Keyword(s):  
Composite Coatings ◽  
Spray Coating ◽  
High Hardness ◽  
Xrd Analysis ◽  
Atmospheric Plasma ◽  
Crystallographic Structure ◽  
The Coefficient Of Friction ◽  
Sem Micrograph ◽  
Composite Mixture ◽  
Pin On Disk

A composite mixture of Metco 105 SFP, 99.9% Al2O3 and Metco 201 NS, ZrO2.5CaO were blended in the pursuit of high hardness and improved wear resistance characteristics for tribological applications. In this context a composite mixture of alumina and calcia stabilized zirconia in 50:50 by wt. % proportion was developed, and applied over Al-6061 substrates. Atmospheric plasma spray coating technique was used to develop the coating systems. The ASTM G132 standard, a pin-on-disk tribometer was used to determine the specific wear rate at different normal loads of 5 N, 10 N and 15 N. Experimental results revealed that the top coat primarily subjected to sliding and localized abrasion and also confirmed with SEM micrograph. Sliding has mainly occurs in the plane of <111>, <200>, <220>, <311>, <222> found in the XRD analysis. Irrespective of the applied normal loads the coefficient of friction doesn’t influences much in the abrasive wear studies. However, wear mechanism was found to primarily dependent on the phases and on the crystallographic structure of the material used.  

Modeling Technological Parameters for Producing Combined Electrospark Deposition Coatings

2019 ◽  
Vol 968 ◽  
pp. 131-142 ◽  
Author(s):  
Viacheslav Tarelnyk ◽  
Ievgen Konoplianchenko ◽  
Nataliia Tarelnyk ◽  
Aleksey Kozachenko
Keyword(s):  
Electrode Materials ◽  
Protective Coatings ◽  
High Hardness ◽  
Mass Transfer Process ◽  
Electrode Pair ◽  
Surface Plastic ◽  
Technological Parameters ◽  
Electrospark Deposition ◽  
Wear Resistant

The paper represents a formalized methodology for solving the problem of creating fundamentally new materials, such as "base - coating" ones, which have increased surface wear resistance and relatively high strength and viscosity. Electrospark alloying (ESA) method is proposed as a process for depositing protective coatings on metal surfaces. There are considered the issues of improving the quality of the coatings formed by the ESA method. There is specified a feature of processing the surfaces having been treated with the use of the ESA method, which feature being associated with a relatively small thickness of the layers formed (tens of micrometers). Since to reduce the roughness of the surface, the process of grinding is difficult or even unacceptable to perform, it has been suggested to use the method of surface plastic deformation (SPD). One of the effective SPD methods for finishing the parts is a diamond smoothing process, which, in contrast to running-in with a ball or roller, allows processing the parts of very high hardness values. As a reserve to improve the quality of coatings formed by the ESA method, there is considered a process for producing combined electrospark deposition coatings (CEC) with hard wear-resistant and soft anti-friction metals integrated therein. There are represented the results of mass transfer process investigation performed at forming the CEC on the specimens of steel 45 with indium, tin and copper being used as soft antifriction metals, and tungsten and hard alloy of VK8 grade applied as wear-resistant materials. There is represented a mathematical model for calculating the main ESA technological parameters being necessary for forming the CEC and allowing to predict the weight gain (increase in weight) and size gain (increase in size) at the cathode (the part). It allows predicting the CEC main technological parameters for any electrode pair materials (substrate material and electrode materials making up the CEC).

Ti3SiC2 – A New High Temperature Solid Self-Lubricating Additive Agent

2013 ◽  
Vol 815 ◽  
pp. 626-631
Author(s):  
Li Xin Li ◽  
Xue Quan Liu ◽  
Cun Guang Ding ◽  
Yi Li ◽  
Fa Chang Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Coefficient Of Friction ◽  
Dry Sliding ◽  
Dynamic Coefficient ◽  
Test Results ◽  
Tribological Test ◽  
Solid Additive ◽  
Lubricating Property ◽  
Pin On Disk ◽  
Dynamic Coefficient Of Friction

With the additive agent Ti3SiC2, the dry sliding behavior of Cr3C2-Ni and Cr3C2-Ni-Ti3SiC2 composites against GCr15 was investigated with a pin-on-disk tester at 400 °C in air under the load of 200N. Without Ti3SiC2, the dynamic coefficient of friction (COF) curves was fluctuated severely. After adding Ti3SiC2, the COF was decreased from 0.37 to 0.32, and the initial transition region of dynamic COF curve was shortened. These tribological test results showed that Ti3SiC2 was a new kind of solid additive agent with favorable high temperature self-lubricating property, and two possible mechanisms was proposed for its anti-friction ability.

scholarly journals Effects of Tool Coatings on Energy Consumption in Micro-Extrusion of Aluminum Alloy 6063

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 381
Author(s):  
Sedthawatt Sucharitpwatskul ◽  
Numpon Mahayotsanun ◽  
Sujin Bureerat ◽  
Kuniaki Dohda
Keyword(s):  
Aluminum Alloy ◽  
Energy Consumption ◽  
Wear Rate ◽  
Tool Wear ◽  
Coefficient Of Friction ◽  
High Hardness ◽  
Tool Wear Rate ◽  
Tool Coatings ◽  
Increase Tool Life ◽  
Aluminum Alloy 6063

The tool wear rate and energy consumption were typically unknown in micro-extrusion, which made it difficult to optimize the tool design for both the final part quality and production cost. This study investigated the effects of tool coatings on energy consumption in the micro-extrusion of aluminum alloy 6063. Three main factors were considered in this study: (1) tool coating types, (2) bearing length, and (3) extrusion ratio. The micro-extrusion finite element simulation model was developed and validated with the micro-extrusion experiment. The results showed that increasing bearing lengths led to the increase in tool wear rate and energy consumption for all the coating types. The decreasing coefficient of friction values of the tool-billet interface led to a decrease in energy consumption. High hardness values of the tool surface and low bearing lengths helped increase tool life. Low values of coefficient of friction and bearing lengths helped decrease energy consumption.

New High-Hardness Low-Alloy Wear-Resistant Ledeburitic Steel and the Prospects of Its Application at Negative Temperatures

2020 ◽  
Vol 2020 (4) ◽  
pp. 383-386
Author(s):  
V. I. Antipov ◽  
L. V. Vinogradov ◽  
A. G. Kolmakov ◽  
Yu. E. Mukhina ◽  
I. O. Bannykh
Keyword(s):  
High Hardness ◽  
Wear Resistant ◽  
Negative Temperatures

scholarly journals Tribological Effects of Mineral-Oil Lubricant Contamination with Biofuels: A Pin-on-Disk Tribometry and Wear Study

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
S. M. Shanta ◽  
G. J. Molina ◽  
V. Soloiu
Keyword(s):  
Wear Behavior ◽  
Mineral Oil ◽  
Engine Oil ◽  
Chicken Fat ◽  
Wear Protection ◽  
Stainless Steel Ball ◽  
Aisi 316 Stainless Steel ◽  
Aisi 316 ◽  
Cold Walls ◽  
Pin On Disk

Use of biodiesel produces engine oil dilution because of unburned biodiesel impinging on cold walls of the combustion chamber, being scrapped to the oil pan, and leading to changes of oil friction, wear and lubricity properties. In this paper, mixtures of SAE 15W-40 oil, which were contaminated by known percentages of the biodiesels from canola oil, peanut oil, soybean oil, and chicken fat, were tested in a pin-on-disk tribometer. A contact was employed of AISI 1018 steel disk and AISI 316 stainless-steel ball for pin material, and friction force and specific wear were measured. Wear on the disk surfaces showed that any degree of mineral-oil dilution by the tested biodiesels reduces the wear protection of engine oil even at small mixture percentages. However, these reductions were not substantially different than those observed for same percentages of dilution of mineral oil by fossil diesel. The tested mixture of oil contaminated with animal fat feedstock (e.g., chicken fat) biodiesel showed the best wear behavior as compared to those for the other tested mixtures (of mineral oil with vegetable feedstock biodiesel dilutions). Obtained results are discussed as baseline for further studies in a renewable energy multidisciplinary approach on biofuels and biolubes.

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.

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