Tribological Properties of Ion Implanted Amorphous Fe50Ti50 Films

1987 ◽  
Vol 93 ◽  
Author(s):  
G.-P. Hirvonen ◽  
M. Nastasi ◽  
J. W. Mayer
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Peak Pressure ◽  
Ion Beam ◽  
Surface Friction ◽  
304 Stainless Steel ◽  
Wear Properties ◽  
Aisi 304 ◽  
Pin On Disc ◽  
Friction And Wear Properties

ABSTRACTA surface layer of Fe50Ti50 on AISI 304 stainless steel was produced by ion beam mixing a Fe-Ti multilayer structure. Subsequently, the layer was implanted with C, N, or C+N ions. The dry sliding properties of these surfaces were tested using a ceramic pin as a rider in pin-on-disc measurements. Implantations produced significant improvements in the surface friction and wear properties. Samples implanted with C or C+N showed good tribological properties even under conditions where the Herzian peak pressure exceeded the yield strength of the substrate. As a result of different treatments the appearance of the wear tracks examined with a scanning electron microscope was also changed.

Measurements of friction and wear of powder composite materials by the «pin-on-disc» mechanism

2020 ◽  
pp. 60-63
Author(s):  
F. F. Yusubov
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Optical Microscope ◽  
Wear Properties ◽  
Pin On Disc ◽  
Dry Mixing ◽  
Friction And Wear Properties ◽  
Powder Metallurgy Methods

In this study, friction and wear properties of friction composite materials which is developed by powder metallurgy methods was examined.The technological sequence such as grinding, dry mixing, pressing and sintering wereused in the manufacturing of materials. The tribological properties of the obtained specimens were studied on a vertical machine MMW-1 using the «pin-on-disc» mechanism. The optical microscope Amscope was used to analyze the wear surfaces.

The Tribological Properties of Blending PA6 with POM Composite

2011 ◽  
Vol 66-68 ◽  
pp. 1132-1135
Author(s):  
Chi Lan Cai ◽  
Jian Li
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Room Temperature ◽  
Composite System ◽  
Steel Ball ◽  
Sliding Contact ◽  
Curing Process ◽  
Wear Properties ◽  
Pin On Disc ◽  
Friction And Wear Properties

The aim of this work is the evaluation of the effects of PA6 content on the friction andwear properties of POM composite system. Friction andwear properties of PA6/POM composite were determined with the help of pin-on-disc tribometer in sliding contact with a steel-ball at room temperature without lubrication. The spectroscopic investigations reveal that the increasing concentration of PA6 has a drastic influence on crosslinking efficiency due to their interference with POM in curing process. As a result, POM filled PA6 with higher concentration showed remarkably enhanced friction and wear properties.

Amorphous Carbon Coatings for Locally Adjusted Tribological Properties in Sheet Bulk Metal Forming

2012 ◽  
Vol 504-506 ◽  
pp. 969-974 ◽  
Author(s):  
Harald Hetzner ◽  
Stephan Tremmel ◽  
Sandro Wartzack
Keyword(s):  
Amorphous Carbon ◽  
Tribological Properties ◽  
Metal Forming ◽  
Friction And Wear ◽  
Wear Properties ◽  
Carbon Coatings ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
Friction And Wear Properties ◽  
Amorphous Carbon Coatings

In sheet bulk metal forming, locally adapted friction properties of the contact tool/workpiece are an appropriate means for the targeted enhancement of the material flow, enabling an improved form filling and lowered forming forces. However, the implementation of desirable friction conditions is not trivial. And further, friction is inseparably linked to wear and damage of the contacting surfaces. This calls for a methodological approach in order to consider tribology as a whole already in the early phases of process layout, so that tribological measures which allow fulfilling the requirements concerning local friction and wear properties of the tool surfaces, can already be selected during the conceptual design of the forming tools. Thin tribological coatings are an effective way of improving the friction and wear properties of functional surfaces. Metal-modified amorphous carbon coatings, which are still rather new to the field of metal forming, allow tackling friction and wear simultaneously. Unlike many other types of amorphous carbon, they have the mechanical toughness to be used in sheet bulk metal forming, and at the same time their friction properties can be varied over wide ranges by proper choice of the deposition parameters. Based on concrete research results, the mechanical, structural and special tribological properties of tungsten-modified hydrogenated amorphous carbon coatings (a-C:H:W) are presented and discussed against the background of the tribological requirements of a typical sheet bulk metal forming process.

Tribological properties of the epoxy resin-based solid lubricant coating modified by Kevlar fibers

2018 ◽  
Vol 70 (9) ◽  
pp. 1706-1713 ◽  
Author(s):  
Guotao Zhang ◽  
Yanguo Yin ◽  
Ting Xie ◽  
Dan Li ◽  
Ming Xu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Epoxy Resin ◽  
Tribological Properties ◽  
Dry Friction ◽  
Friction And Wear ◽  
Solid Lubricant ◽  
Transfer Film ◽  
Wear Properties ◽  
Content Type ◽  
Friction And Wear Properties

Purpose This paper aims to obtain high mechanical and good tribological properties of epoxy resin-based coatings under dry friction conditions. Design/methodology/approach Bonded solid lubricant coatings containing Kevlar fibres were prepared by a spraying method. The friction and wear properties of the coatings were experimentally investigated with a face-to-face tribometre under dry friction conditions. Scanning electron microscopy, energy dispersive X-ray spectroscopy and 3D laser scanning technologies were used to characterise the tribological properties. The action mechanism of the Kevlar fibres on a solid lubricant transfer film was also analysed. Findings Adding Kevlar fibres can significantly improve the wear resistance of the coatings. When the Kevlar fibre content increases, the tribological properties of the coatings improve and then worsen. Superior properties are obtained with 0.03 g of Kevlar fibres. Appropriately increasing the load or speed is beneficial to the removal of the outer epoxy resin and the formation of a lubricant film. During friction, the solid lubricants wrapped in the epoxy resin accumulate on the surface to form a transfer film that shows a good self-lubricating performance. In the later friction stage, fatigue cracks occur on the solid lubricant film but cannot connect to one another because of the high wear resistance and the entanglement of the rod-like Kevlar fibres. Thus, no large-area film falls from the matrix, thereby ensuring the long-term functioning of solid lubricant coatings. Originality/value Epoxy resin-based solid lubricant coatings modified by Kevlar fibres were prepared, and their friction and wear properties were investigated. Their tribological mechanisms were also proposed. This work provided a basis for the analysis of the tribological properties and design of bonded solid lubricant coatings containing Kevlar fibres.

scholarly journals Effects of Reduced Graphene Oxide (rGO) at Different Concentrations on Tribological Properties of Liquid Base Lubricants

Lubricants ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 11 ◽  
Author(s):  
Jankhan Patel ◽  
Amirkianoosh Kiani
Keyword(s):  
Graphene Oxide ◽  
Physical Properties ◽  
Reduced Graphene Oxide ◽  
Tribological Properties ◽  
High Speed ◽  
Friction And Wear ◽  
Control Sample ◽  
Wear Properties ◽  
Reduced Graphene ◽  
Friction And Wear Properties

In this study, reduced graphene oxide (rGO) nano platelets were used as an additive to enhance friction and wear properties of oil-based lubricants by preparing three samples at 0.01% w/w, 0.05% w/w, and 0.1% w/w concentrations. To analyze the direct effect of rGO nano platelets on tribological properties, 99.9% pure oil was used as a liquid lubricant. A comparative tribological study was done by performing a ball-on-disk wear test in situ under harsh conditions, which was further analyzed using a non-contact 3D optical profilometer. Morphological evaluation of the scar was done using transmission and scanning electron microscopy (TEM, SEM) at micro and nano levels. The lubricants’ physical properties, such as viscosity and oxidation number, were evaluated and compared for all samples including pure oil (control sample) as per ASTM standards. Findings of all these tests show that adding rGO nano platelets at 0.05% w/w showed significant reduction in friction at high speed and in wear up to 51.85%, which is very promising for increasing the life span of moving surfaces in machinery. Oxidation and viscosity tests also proved that adding rGO nano platelets to all samples does not sacrifice the physical properties of the lubricant, while it improves friction and wear properties.

scholarly journals Effect of temperature and mating pair on tribological properties of DLC and GLC coatings under high pressure lubricated by MoDTC and ZDDP

Friction ◽  
2020 ◽  
Author(s):  
Kang Liu ◽  
Jia-jie Kang ◽  
Guang-an Zhang ◽  
Zhi-bin Lu ◽  
Wen Yue
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Effect Of Temperature ◽  
Wear Properties ◽  
Dlc Coatings ◽  
Base Oil ◽  
Two Temperatures ◽  
Friction And Wear Properties ◽  
Lubrication Conditions ◽  
Better Than

AbstractDiamond-like carbon (DLC) and graphite-like carbon (GLC) coatings have good prospects for improving the surface properties of engine parts. However, further understanding is needed on the effect of working conditions on tribological behaviors. In this study, GLC and two types of DLC coatings were deposited on GCr15 substrate for investigation. The friction and wear properties of self-mated and steel-mated pairs were evaluated. Two temperatures (25 and 90 °C), three lubrication conditions (base oil, molybdenum dithiocarbamate (MoDTC)-containing oil, MoDTC+zinc dialkyldithiophosphate (ZDDP)-containing oil), and high Hertz contact stress (2.41 GPa) were applied in the experiments. The results showed that high temperature promoted the effect of ZDDP on steel-mated pairs, but increased wear under base oil lubrication. The increased wear for steel-mated pairs lubricated by MoDTC-containing oil was due to abrasive wear probably caused by MoO3 and β-FeMoO4. It was also found that in most cases, the tribological properties of self-mated pairs were better than those of steel-mated pairs.

Preparation and Tribological Properties of Nb1-xTixSe2 Micro/Nanoparticles

2012 ◽  
Vol 619 ◽  
pp. 536-540
Author(s):  
Jia Qing Liang ◽  
Chang Sheng Li ◽  
Hua Tang ◽  
Yi Zhang ◽  
Wen Jing Li ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Layer Structure ◽  
Nano Particles ◽  
Wear Properties ◽  
Repair Work ◽  
X Ray ◽  
Friction And Wear Properties ◽  
Antiwear Ability

Nb1-xTixSe2(x=0～1) micro/nano-particles have been successfully prepared via solid-state thermal (750°C) reaction between microsized Nb, Ti with Se powders under seal environment in a seal quartz tube and characterization by X-ray diffractometer and scanning electron microscopy. It was found that the morphologies of the as-prepared products changed from microplates to micro-nanoparticles or aggregations composed of layer structure with the doping of Ti. And the amount of regular hexagonal microplates evidently reduced and nanoscaled particles increased with the increase of the contents of Ti dopant within a certain limit (1-20 atwt. %). The tribological properties of the as-prepared products as additives in paraffin were investigated by UMT-2 multispecimen tribotester. By the addition of Nb1-xTixSe2micro/nanoparticles in paraffin, the antiwear ability was improved and the friction coefficient was decreased. The paraffin with Nb1-xTixSe2micro/nanoparticles showed better tribological properties than that with pure NbSe2. A combination of the molecule-bearing mechanism of sliding friction, and fill in-repair work between the rubbing surfaces can explain the good friction and wear properties of Nb1-xTixSe2micro/nanoparticles.

Study on Friction and Wear Properties of Self-Lubricating Impregnated Diamond Bit Cutters

2011 ◽  
Vol 175 ◽  
pp. 136-139 ◽  
Author(s):  
Bing Suo Pan ◽  
Xiao Hong Fang ◽  
Ming Yuan Niu
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
Matrix Material ◽  
Wear Loss ◽  
Wear Properties ◽  
Wear Process ◽  
Impregnated Diamond Bit ◽  
Pin On Disc ◽  
Friction And Wear Properties ◽  
Diamond Bit

To reduce the friction coefficient between impregnated diamond bit and rock, experiments on addition of graphite to the matrix material of bit cutters were conducted. The cutters were made up of diamond contained working layers and binding layers. The friction and wear properties of cutters and binding layers were investigated using a pin-on-disc friction & wear tester with granite as tribopair. The results showed that with addition of graphite, the hardness and friction coefficient of binding layer decreased, but its wear resistance increased; compared to cutters without graphite, those cutters containing graphite had lower wear loss and friction coefficient and their sliding wear process was much steadier, but diamond protrusion was still normal.

Tribological Properties of the Overbased Calcium Sulfonate Complex Greases Containing Different Lubricant Additives

2013 ◽  
Vol 645 ◽  
pp. 133-136
Author(s):  
Peng Qiao ◽  
Yan Qiu Xia ◽  
Xiang Yu Ge
Keyword(s):  
Ionic Liquid ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Tribological Performance ◽  
Mining Equipment ◽  
Wear Properties ◽  
Friction Tester ◽  
Calcium Sulfonate ◽  
Friction And Wear Properties

Overbased calcium sulfonate complex greases have excellent friction and wear properties and have been widely used in metallurgy and mining equipment. The effects and tribological performance of molybdenum dialkydithiocarbamate (MoDTC) and ionic liquid 1-(2-hydroxyethyl)-3-methylimidazolium bis (trifluoromethylsulfonyl) imide ([C2OHMim][NTf2]), 1-(2-hydroxyethyl)-3-hexylimidazolium bis (trifluoromethylsulfonyl) imide ([C2OHHim][NTf2s]), added in overbased calcium sulfonate complex grease as additives were investigated by using reciprocating ball-on-disk sliding friction tester. The results showed that the two kinds of additives with a certain range of concentration could improve the tribological properties of greases.

scholarly journals Unlubricated Sliding Properties of Ion Beam and Excimer Laser Mixed Fe-Ti-C Multilayered Films

1988 ◽  
Vol 140 ◽  
Author(s):  
J-P. Hirvonen ◽  
M. Nastasi ◽  
T.R. Jervis ◽  
J.R. Tesmer ◽  
T.G. Zocco
Keyword(s):  
Excimer Laser ◽  
Steel Substrate ◽  
Ion Beam ◽  
304 Stainless Steel ◽  
Optimum Conditions ◽  
Multilayered Films ◽  
Aisi 304 ◽  
Pin On Disc ◽  
Total Fluence ◽  
Mixed Samples

AbstractMultilayered Fe-Ti-C films consisting of eleven sublayers were vacuum deposited onto an AISI 304 stainless steel substrate and subsequently mixed using either 400 keV Xe ions or an excimer laser operating at a wavelength of 308 nm. Ion mixing was accomplished in a two step process: the multilayers were first irradiated with 1xl017 Xe/cm2 at 520 °C, after which half of the sample was irradiated with 5x1015 Xe/cm2 at 0 °C. Laser mixing was carried out at both 1.1 and 1.7 J/cm17 with the number of pulses varied between 1 and 10. Pin-on-disc studies revealed only slight differences between the two kinds of ion beam mixed samples, whereas the dry sliding properties of laser mixed samples were strongly dependent on the total fluence used. In the optimum conditions, similar friction coefficients were obtained on both kinds of samples.

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