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devices „MBZ 1" for shaft coatings and „MBZ 3A" for application in rotating machines weremanufactured (see Figs.3, 4, 5, 6), e.g. the „MBZ 3A" for engine cylinders was produced in 30 items.Unfortunately there is not sufficient use of theadvantages of the deposition of copper frictionalcoatings in the overall practice.coatings, however, improve significantly thewearresistance against hydrogen wear [13].Figure 5. View of the brass-coating device MBZ 3AFigure 7. Hardness in different depth after frictionalcoating deposition on steelFigure 6. The brass-coating device applied in anautomatic machineSome diagrams referring to a part of the basicnew results are presented below. In Fig. 7 is giventhe variation of hardness in depth; so thestrengthening can also be obtained at differentrotation speeds.Fig. 8 shows the reduction of hydrogenconcentration of the friction surface in depth. Thehydrogen wear results from synergetic interactionof various surface phenomena: exoemission,adsorption, frictional destruction, which providehydrogen extraction from the frictional surfaces.Thermal gradient is also formed, as well aselectrical and magnetic fields; this leads tohydrogen diffusion in the metal, hydrogenconcentration in the subsurface layer and rapidwear of this layer [12]. Metal defect formation inthe friction deformed layer also increases the H 2concentration and augments the wear. FrictionalFigure. 8. Reduction of H 2 concentration at thefrictional surface in depthFigure 9. Wear distribution in upper dead point of enginecylinder after different sliding paths: for cylinder withfrictional brass coating (left) and uncoated (right)By means of brass frictional coating in differentconstructions of steel and cast iron it can beobtained not only the 10 - 20 % lowering of frictionforce, but also a changed wear distribution, whichis to be seen, e.g., for the upper death point in24 13 th International Conference on Tribology – Serbiatrib’13
engine cylinders of 2-cylinder-twotact-Ottomotorsafter various completed paths (see Fig. 9). This wasthe reason that the brass frictional coatings weresuccessfully applied in the practice of the companyPeißig in Zwickau, especially in highly loaded racemotors for more than 20 years too.3. CONCLUSIONGreen tribology should be integrated into worldscience and make its impact on the solutions forworldwide problems. Being a new field, greentribology has a number of challenges. A basic oneof them, minimising the wear, is being discussed inabove investigation of wear reduction possibilitiesthrough frictional coatings.The study of frictional coatings and theirapplication can be summarized in the following: Self-organization in the system brass-glycerolsteelunder selective transfer is observed andthe obtained film – a designed or controllablecoat with significant change of wearresistance– can be intentionally manipulatedto influence its properties during friction. Important features of the coating depositedduring friction under selective material transfermode: Low wear of components at nonabrasivetreatment of steel/cast iron, and lower hydrogenwear of the coated surfaces; lower inclinationfor welding and seizure between the frictionsurfaces; possibility for dismantling-freerestoration of worn units/couples.The practical implementation of brass-copperfrictional coating is of extreme importance and wasrealized in Germany, Russia, Kazakhstan, Poland, etc.The interdisciplinary character of the study andapplication of technologies for frictional coatingformation, layer growth techniques, surfacetexturing, etc. involves intervention by specialistsof different sciences. The work and collaborationbetween scientists of Russia, Germany, Poland,Bulgaria, Mongolia and Vietnam in this field wascarried out by the International Council forSelective Transfer and Frictional coatings,established in 1990 in London.REFERENCES[1] H. P. Jost: 30 th Anniversary and Green Tribology.Report of a Chinese Mission to the UnitedKingdom, 7-14 June 2009, issued by the TribologyNetwork of the Institution of Engineering &Technology[2] H. P. Jost: The Presidential Address, 5 th WTCKyoto, 2009.[3] W. J. Bartz: Ecotribology: Environmentallyacceptable tribological practices. TribologyInternational, Volume 39, Issue 8, August 2006, pp.728–733.[4] M. Kandeva, E. Assenova, M. Daneva:Triboecology as a methodological center of modernscience. Proceedings of the 2 nd EuropeanConference on Tribology ECOTRIB 2009, Pisa,Italy, 2009.[5] M. Nosonovski, B. Bhushan (edtrs): Greentribology. Biomimetics, Energy Conservation andSustainability, Springer Verlag, 2012.[6] R. Wood: NCats Newsletters, Univ. ofSouthampton, October 2011.[7] E. Assenova, V. Majstorovic, A. Vencl, M.Kandeva: Green tribology and quality of life,International Convention on Quality 2012, Belgrade(Serbia), 05-07.06.2012, Proceedings, p.p. 32-38,Published in: Advanced Quality, 40, 2, p.p.26-32,2012.[8] I.V. Kragelsky: Friction and Wear, Moscow,Mashinostroienie, 1968 (in Russian; available alsoin English)[9] A. Vencl, S.Arostegui, G. Favaro, F. Zivic, M.Mrdak, S. Mitrović, V. Popovic: Evaluation ofadhesion/cohesion bond strength of the thick plasmaspray coatings by scratch testing on coatings crosssections,Tribology International, 44, 11, 2011, p.p.1281-1288.[10] D.N. Garkunov: Triboengineering (wear and nondeterioration),Moscow Agricultural AcademyPress, Moscow, 2000 (in Russian)[11] G. Polzer: Der Erfahrungsaustausch:Reibbeschichten und selective Uebertragung, Publ.Bezirks-Neuerer-Zentrum, Gera, 1988.[12] D.N. Garkunov: Scientific Discoveries inTribotechnologies. No-wear effect under friction:Hydrogen wear of metals. MAA Publishing House,Moscow, 2007.[13] G. Polzer, E. Assenova, Dr. Tsermaa: Copperfrictional coatings under conditions of selectivetransfer, Tribological Journal BULTRIB - Sofia,Vol. 3, 2012.13 th International Conference on Tribology – Serbiatrib’13 25
Page 1 and 2: SerbianTribologySocietyFacultyofEng
Page 3 and 4: Serbian Tribology SocietyUniversity
Page 5 and 6: Supported byMinistry of Education,
Page 7 and 8: PrefaceThe International Conference
Page 9 and 10: ContentsPlenary Lectures1. THE GREE
Page 11 and 12: 27. WEAR CHARACTERISTICS OF HYBRID
Page 13 and 14: Tribometry57. PRELIMINARY STUDY ON
Page 15: Plenary Lectures13 th International
Page 18 and 19: Serbian TribologySocietySERBIATRIB
Page 20 and 21: Figure 4. Diagram of the height and
Page 22 and 23: Realization of the approach is base
Page 29 and 30: edge without chamfer and smaller ra
Page 31 and 32: Figure 7. Accumulated tool life in
Page 33 and 34: Figure 13. Calculated and measured
Page 37: Friction deformation of the bronze
Page 41 and 42: Table 1: Chemical composition of sa
Page 43 and 44: Table 4: Comparative wear-resistanc
Page 47 and 48: - measuring of coating thickness h
Page 49 and 50: Figure 5. Functional scheme of the
Page 53 and 54: Table 2. Test results for massive w
Page 55 and 56: knowledge transfer in the field ofm
Page 57 and 58: Table 1. Parameters of the electroc
Page 59 and 60: Figure 6. Wear resistance by linear
Page 61 and 62: coatings and observed their good we
Page 63 and 64: c)a)Figure 2: SEM images and micros
Page 65 and 66: Room temperature 300°CNi/µSiCNiNi
Page 67 and 68: COF [-] COF [-]Fig.9: COF graphs at
Page 71 and 72: about 260 nm is related to isolated
Page 73 and 74: contact’s conformity [18] they ob
Page 75 and 76: In order to calculate the metallic
Page 77 and 78: microscopic inspection of the Rp3 s
Page 81 and 82: otating plate. The shaft passes thr
Page 83 and 84: similar trends of variation are obs
Page 85 and 86: smooth, gear fiber-mild steel rough
Page 87 and 88: [2] Tabor, D.: “Friction and wear
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Serbian TribologySocietySERBIATRIB
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(10, 50 and 100 N) against surface
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[9] B.R. Gligorijevic, A. Vencl, B.
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dielectric properties, high resista
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parameter, Sv, was slightly influen
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dependence of roughness height and
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Polyethylenes with a molecular weig
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[9] K.S. Kanaga Karuppiah, A.L. Bru
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MgCO3•CaCO3 (13% Mg), and carnall
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fully compatible with MRI/MSCT imag
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5. CONCLUSIONThe magnesium alloys a
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Zinc dialkyldithiophosphate (ZDDP)
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C- Lower deposits with NPNA on comb
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films. Carraro et al. [10] examined
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PlateCount No.Critical Load ( N)120
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solid melt of ZA27 alloy using mech
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SiC particles are uniformly distrib
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in number of micro-cracks and clust
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PBT has the average values of the f
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mechanical pressure and thermal loa
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3. EXPERIMENTAL RESULTSTaking into
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[12] L. Blunt De, X. Jiang: Advance
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2. EXPERIMENTALTESTING2.1 MaterialT
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figure 3a it could be seen that the
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and lubrication is done so that the
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5. CONCLUSIONFigure 11. The accumul
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esistance was found for composite c
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onze, which is embedded within the
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The test contact pair meets the req
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complete. The SEM analysis maycontr
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tg( ) tg 100, [%] (2)tgwhere are:
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corresponding to the maximum value
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electrostatics [17]. Due to the fle
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250nm size have been observed, acco
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ETH Zurich, Switzerland, where all
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comparison with the synthetic reinf
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3. RESULTS AND DISCUSSION3.1 Micros
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(a)(b)Figure 4. Showing (a) variati
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composites. But the composite compo
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coated and uncoated region after ad
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has been measured between the top s
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Fig. 9 shows the wear track obtaine
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Mica samples preparationFor the ads
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According to the AFM results in fig
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[21] B. G. Sharma et al.: Character
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chemical vapor deposition method wi
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analysis (a) and an approximate che
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Table 3. Friction coefficients of s
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A.K.Oleynik, V.M.Matsevity, ea.]. /
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Most of the friction units of produ
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In order to provide both high parts
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Fig. 3. The comparison the criterio
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Table 3. Experimental and calculate
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For developing the numerical model
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,eccentricities and hydrodynamic pr
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hydrodynamic regime. However, for b
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to obtain the temperature distribut
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force (pressure) between two contac
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5E-06The total displacement [m]4.5E
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[11]. Figure 5 shows s the influenc
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efficiency of use, product quality,
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38GSA. The chemical composition, de
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niobium. It should be noted that fo
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Figure 1. Friction force on side su
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exploitation this changing is signi
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2. EFFICIENCY OF CYCLO DRIVEEfficie
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Figure 6. Dependence of cyclo drive
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common for their ability to be inst
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FNF (11)R sin cos11 21 22FNF
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Normal force [N]4000350030002500200
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analytical tests. The analytical te
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Table 4. Results of zero samples of
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noticeable, and by the end of explo
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4. PLASTIC BEARING APPLICATIONSRega
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For Elastohydrodynamic film thickne
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The results concluded for different
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For Thrust Force of 40KNKrytox 215
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Krytox 215 (µ = 0.03204 Pa.s)Figur
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- Reliable exploitation tools, prim
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In addition, as a result of cyclic
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AcknowledgementThe part of this res
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Thepressure angle can be calculated
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mechanism these parameters are fina
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causes big changes of their propert
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Table 2. Impact toughness of some t
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Figure 1. Appearance of fractured f
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implementation of these new manugac
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additional energy is dissipated due
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The adopted geometry parameters are
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4. CONCLUSIONTools of virtual produ
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Figure 2. Structure of the machinin
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3. ANALYSIS OF RESULTSThe results o
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Figure 15. Surface roughness regard
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From the analysis of the diagram it
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comparison from economic, energy co
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Advantages and disadvantages of tra
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The information provided by footwea
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Force (N)5,554,543,532,521,510,50Ex
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additives, that had been, until rec
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Figure 1. Test results for samples
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Table 7. Test results of oil sample
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Input parameters- Current intensity
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edge formed into a thin line. At th
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Lower values of current are not res
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Table 1. Chemical composition of si
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flowable at high temperatures and v
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holes (pits) emerge in the shape of
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[4] W. Schatt, K-P. Wieters, Pulver
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assumption allows us to use, instea
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where P is the load, a - radius of
Page 351 and 352:
determination (total running in tim
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μm, compared with Figure 17, wich
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Serbian TribologySocietySERBIIATRIB
Page 357 and 358:
Especially when the chain transfer
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is obvious that this isa so-calledw
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winches. The authors are inclined t
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find parameters of robot laser hard
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each of which is measured by the le
Page 369 and 370:
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Fractal dimensions were determined
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Figure 3. Modified force acting sch
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0.25Lubricant: L3DC 04Friction coef
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nanocomposites. The influence of fi
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4. RESULTS AND DISCUSSION4.1 Morpho
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Figure 6. Loading and unloadin vers
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3 8 12 1 4 2 4
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The material after qualifying the r
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It has already been mentioned that
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Degradation & Stability, Vol. 69, N
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conformance to researchers’ requi
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This part is assembled of pneumatic
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matrixes describe the state of the
Page 401 and 402:
values influence of themeasurement
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Figure 1. Friction stir weldinga -
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(t 2 t
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M fr / T [-] [-]10.90.80.70.60.50.4
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M fr / T [-]10.90.80.70.60.50.40.30
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experimentally determined that for
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4. DISCUSSIONAccording to the theor
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2.1 The life cycle of the reportThe
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Obviously the report is checked and
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uticaja na osnovu kompozita, a time
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5. ZAKLJUČCIStruktura tiksolivene
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dobijene različite karakteristike
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vizuelno, na dnevnoj svetlosti, pod
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LITERATURA[1] Зинченко В.
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Slika 1. Rotorni bager - glodar VII
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stvaraju sliku stanja i svoja zapa
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njihovih kotrljanih elemenata. Mere
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postupka i uticaja parametara depoz
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posledica različite raspodele mikr
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ZrO 2 Y 2 O 3 je takođe zbog oksid
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3.2 Pneumatska osetljivostOblast pr
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p mg (δ), koji je zbog malih struj
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PNEUMATIC PROBE HEAD SELECTION FOR
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1. Podsistem kopanja2. Podsistem pr
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Slika 3. Kriva habanjaNa tom dijagr
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Mjereni su parametri habanja i pril
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preše prevladavaju kombinirani uvj
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a) b)Slika 5. Karakteristična mikr
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varijantnih materijala u dostavnom
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Jovanović D. 414, 446KKaleicheva J
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CIP - Каталогизација
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