Investigation of the thermophysical and antifriction properties of polyethylene compositions

1971 ◽  
Vol 3 (5) ◽  
pp. 577-581
Author(s):  
S. B. Ainbinder ◽  
N. G. Andreeva
Keyword(s):  
Antifriction Properties

Mathematical Model of the Sintering Process of Iron-Copper Bearings

2007 ◽  
Vol 23 ◽  
pp. 119-122
Author(s):  
Cristina Teișanu ◽  
Stefan Gheorghe ◽  
Ion Ciupitu
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Mathematical Model ◽  
Regression Analysis ◽  
Function Optimization ◽  
Chemical Compositions ◽  
Sintering Process ◽  
Molybdenum Disulphide ◽  
Iron Copper ◽  
Antifriction Properties

The most important features of the self-lubricating bearings are the antifriction properties such as friction coefficient and wear resistence and some mechanical properties such as hardness, tensile strength and radial crushing strength. In order to improve these properties new antifriction materials based on iron-copper powders with several additional components (tin, lead and molybdenum disulphide) have been developed by PM techniques. To find the optimal relationship between chemical compositions, antifriction and mechanical properties, in this paper a mathematical model of the sintering process is developed, which highlighted the accordance of the model with data by regression analysis. For the statistical processing of the experimental data the VH5 hardness values of the studied materials were considered. The development of mathematical model includes the enunciation of the model, the establishment of the performance function (optimization) and the establishment of the model equations and verifying. The accordance of the model with experimental data has been highlighted by regression analysis

Antifriction properties of iron-base metal/non metal composites

1966 ◽  
Vol 1 (5) ◽  
pp. 393-394
Author(s):  
I. N. Fedorchenko ◽  
N. A. Filatova ◽  
V. V. Pushkarev
Keyword(s):  
Base Metal ◽  
Metal Composites ◽  
Iron Base ◽  
Antifriction Properties

Formation of boundary lubricating films in the presence of complexing additives

2020 ◽  
pp. 367-371
Author(s):  
M.V. Boiko ◽  
I.V. Kolesnikov ◽  
S.F. Ermakov ◽  
T.G. Boiko ◽  
A.A. Bicherov
Keyword(s):  
Boundary Layers ◽  
Ethylenediaminetetraacetic Acid ◽  
Complex Compounds ◽  
Surface Films ◽  
Base Oil ◽  
Antifriction Properties

The formation of boundary lubricating films on the surface of steel during friction in the presence of substances forming complex compounds with iron — dipyridyl, o-phenanthroline, 8-hydroxyquinoline, and ethylenediaminetetraacetic acid, is considered. Boundary layers formed in the presence of complexones increase the antifriction properties of the lubricant at low loads. It has been established that surface films are formed predominantly from base oil molecules.

scholarly journals Friction surface modifiers of carbon-containing material for high-temperature operation

2021 ◽  
Vol 2124 (1) ◽  
pp. 012013
Author(s):  
M N Roshchin
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Friction Coefficient ◽  
Friction Surface ◽  
Atmospheric Conditions ◽  
Temperature Range ◽  
Tribological Tests ◽  
Surface Modifiers ◽  
Antifriction Properties ◽  
High Temperature Operation

Abstract The results of high-temperature tribological tests of carbon-containing material in friction on heat-resistant stainless steel 40X13 in the temperature range from 20 to 700 °C under atmospheric conditions are presented. Friction surface modifiers “Argolon-2D” material improve antifriction properties and decrease friction coefficient value. Friction coefficient when using Ni-Se-PTFE modifier at load of 0.67 MPa and speed of 0.16 m/s is less by 5% than at speed of 0.05 m/s, and at speed of 0.25 m/s friction coefficient is less by 13% than at speed of 0.05 m/s. At 500 °C and a load of 0.67 MPa the friction coefficient when using Ni-Se-PTFE modifier is 30% higher than when using InSb-PTFE modifier, and the friction coefficient when using CuO-PTFE modifier is 1.2 times higher than when using InSb-PTFE modifier.

scholarly journals Epoxy antifriction wollastonite-filled materials

Vestnik MGSU ◽  
2019 ◽  
pp. 311-321
Author(s):  
Elena M. Gotlib ◽  
Аlmira R. Khasanova ◽  
Engel R. Galimov ◽  
Аlla G. Sokolova
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Adhesion Strength ◽  
Quaternary Ammonium ◽  
Epoxy Compound ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Antifriction Properties ◽  
The Impact ◽  
Compound Materials

Introduction. Domestic mineral natural-origin filler ‘wollastonite’, also known as calcium methyl silicate, is widely used as a base for wear-resisting epoxy antifriction materials. Due to anisodiametric shape of its particles, wollastonite functions as a micro reinforcement fibre enhancing adhesion strength and wear resistance of epoxy compositions, improving their antifriction properties, especially when organomodifying by quaternary ammonium salts. In this regard, the investigation of the impact of chemical composition of such surfactants as quaternary ammonium salts on the properties of epoxy compound materials presents utmost interest for researchers developing low-friction materials. Materials and methods. Epoxy diane resin ED-20 was hardened with aminoalkylphenol AF-2. Content of epoxy hardener was determined by equimolar ratio of epoxy groups to amine groups. Domestic wollastonite of the grade Miwoll 10-97 was used as filler, particle length to the diameter correlated as 15:1. The wollastonite surface was activated with surfactants belonging to domestically produced quaternary ammonium salts. Wear resistance of specimens was tested by means of the vertical optical caliper IZV-1. Friction coefficient was estimated with the assistance of the computer-automated frictional machine CSM Instruments Tribometer. Adhesion strength of glue joint was determined as per GOST 28840-90 standard. Two bars of sheet aluminium were used as glued surfaces as per GOST 14759-69 standard. Results. Reduction of wear of epoxy coatings when modified with micro reinforcing wollastonite can be explained by the increase of cross-linking degree of the polymer. The length of alkyl radical of quaternary ammonium salts used for wollastonite surface activation affects the intervals between the epoxy links. As the quaternary ammonium salt chain length is growing, wear of epoxy materials is reducing. Introduction of the wollastonite containing metallic oxides in the epoxy composites increases wear resistance and adhesion strength and reduces coating friction coefficients. Conclusions. Hardened with the AF-2 and filled with the wollastonite of the Miwoll 10-97 grade, the epoxy compound materials have enhanced wear resistance and adhesion strength and lower friction coefficient. The best result is observed when applying wollastonite modified with a surfactant belonging to the class of quaternary ammonium salts. The wollastonite can be used for practical purposes as a perspective reinforcing agent for epoxy materials with improved wear resistance, enhanced adhesion to metals and reduced friction coefficient.

Antifriction properties of aluminum alloys after surface laser alloying

1991 ◽  
Vol 33 (10) ◽  
pp. 772-776 ◽  
Author(s):  
Ya. D. Kogan ◽  
Z. S. Sazonova ◽  
V. D. Aleksandrov ◽  
T. M. Borovskaya
Keyword(s):  
Aluminum Alloys ◽  
Laser Alloying ◽  
Antifriction Properties ◽  
Surface Laser

Influence of Oxynitriding on Antifriction Properties of Ti–6Al–4V Titanium Alloy

2020 ◽  
Vol 41 (4) ◽  
pp. 333-337
Author(s):  
I. M. Pohrelyuk ◽  
J. Padgurskas ◽  
O. V. Tkachuk ◽  
A. G. Luk’yanenko ◽  
V. S. Trush ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Antifriction Properties

A New Approach to Improving Oil Lubricity

2007 ◽  
Author(s):  
V. A. Levchenko ◽  
Z. V. Ignatieva ◽  
I. A. Buyanovsky ◽  
V. N. Matveenko
Keyword(s):  
Solid Substrate ◽  
Active Centers ◽  
Carbon Coatings ◽  
New Approach ◽  
Nitrogen Doped ◽  
Molecular Ordering ◽  
Contact Loads ◽  
Uncoated Steel ◽  
Antifriction Properties ◽  
Polycrystalline Structures

A new approach to oil lubricity improving is considered. It bases on changes in molecular structural ordering of adsorbed oil boundary layers governed by a highly oriented solid substrate. Among diamond-like coatings with varying structure there are some ones (with monocrystalline or polycrystalline structures) having orientation effect on molecular ordering of lube oils what leads to decrease in friction coefficient. It is shown that orientating and adsorption effects of carbon coatings can be intensified by additional active centers creation on their surfaces, particularly by nitrogen atoms doping. The tribotests had shown better antifriction properties of nitrogen doped coatings at various contact loads both under dry friction and under friction in lube oils as compared with that of amorphous carbon coating and uncoated steel.

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