effect of niobium on the dry sliding friction and wear

The results showed that the Nb-coated Ti-Al alloy mainly comprised Nb AlNb2 AlMoTi2 and -Ti phases Room temperature sliding-friction tests indicated that the Nb-coated Ti-Al alloy exhibited a stable friction coefficient of an average value of 0 25 whilst the same value for via the uncoated Ti The wear resistance of the NbC coating is consistent with its high hardness (see Table 1) and the lubricating effect provided by the Bi in the Bi/NbC system is also clear Conclusions NbC Bi and Bi/NbC coatings were deposited onto AISI M2 steel substrates using unbalanced magnetron sputtering at room temperature with zero bias voltage

Materials

Scientists have studied friction and wear from the late fifteenth century when Leonardo da Vinci developed the first friction model More recently in 1966 H Peter Jost coined the new word Tribology to indicate the combined effect of friction and wear that influences the strength of materials

2008-8-25Fig 7 presents the variations of friction coefficient with test time of the Nb-free and Nb-contained clad coatings and the 0 45% C carbon steel under dry sliding wear test condition The friction coefficient of Nb-free clad coating oscillates around 0 48 which is obviously smaller than that of the 0 45% C carbon steel specimen which

2020-6-8Niobium is a material widely used for particle accelerating facilities such as cavities These components are usually obtained through forming processes and then to understand the friction behavior of niobium sheets during the forming process can be very useful Therefore in this work the friction behavior of niobium sheets under conditions similar to the ones faced in forming processes has

2020-6-30For the best tribological properties under 10 N dry sliding wear test condition the friction coefficient was 0 53 the wear rate was 3 3710~(–6) mm/(Nm) and the wear mechanism was mild abrasive wear The friction coefficient and the wear rate of the coating without heat treatment were 0 53 and6 3910~(–6) mm/(Nm) respectively

2019-12-2THE TRIBOLOGICAL PROPERTY PROFILE OF HARD METALS AND METAL MATRIX COMPOSITES BASED ON NIOBIUM CARBIDE M Woydt1 and H Mohrbacher2 1BAM Federal Institute for Materials Research and Testing DE-12200 Berlin Germany 2NiobelCon bvba BE-2970 Schilde Belgium Keywords: Niobium Carbide Metal Binder Metal Matrix Composite Friction Wear Hardness

Friction and Friction Coefficients

2020-8-14The friction force is the force exerted by a surface when an object moves across it - or makes an effort to move across it The frictional force can be expressed as F f = μ N (1) where F f = frictional force (N lb) μ = static (μ s) or kinetic (μ k) frictional coefficient N = normal force between the surfaces (N lb) There are at least two types of friction forces

The positron annihilation studies of well-annealed niobium samples after dry sliding or sandblasting are reported These treatments modify surface and subsurface regions introducing crystalline defects which are extended beneath the surface of the sample at a depth of about 140 m for the highest applied load of 50 N These defects can be identified as dislocations with jogs or vacancies

2019-7-1Effect of Load Speed and Sliding distance Fig 7: Wear v/s Load Fig 8: Wear v/s Speed Fig 9: Wear v/s sliding distance From Fig 5 it is evident that at 500 rpm as load increases wear increases for a sliding distance of 1500m It is evident omposite coatings do exhibit very high wear resistance even at high loads of 20N

2017-9-62 3 Wear test and wear loss characterization The dry sliding wear tests were conducted on a micro tribometer module CETR UTM-2 operating with linear reciprocating motion drive The samples are rubbed against a ball-shaped upper specimen made of 9 5 mm diameter tungsten carbide ball A load of 25 N stroke length of 2

In the latter case wear volume was determined by measuring the cross-section area of the material displaced at the edges at eight equidistant positions along the wear track /PAfter dry sliding test the higher wear resistance condition was selected in order to study its behavior on corrosive media and compared it with untreated specimens

The Journal Impact 2019-2020 of Wear is 3 040 which is just updated in 2020 Compared with historical Journal Impact data the Metric 2019 of Wear dropped by 9 52 % The Journal Impact Quartile of Wear is Q1 The Journal Impact of an academic journal is a scientometric Metric that reflects the yearly average number of citations that recent articles published in a given journal received

In this work the dry sliding friction and wear properties were studied by wear test for 100Cr6 bearing steel when Nb content was 0 018% and 0 040% In addition in order to explain the differences the experimental samples were processed for spheroidizing annealed and the quenched-tempered microstructure and hardness was analyzed

2018-6-10The effect of surface temperature on the friction and wear of RB ceramics substantially differed among the ball material types The friction coefficient for the RB ceramics sliding against an alumina ball decreased with increasing temperature and

Personal Information: Science Publishing Group

The paper titled "Dry sliding wear behaviour of graphite filler filled glass-epoxy composites at elevated temperatures" presented at Int Conference on Total Engineering Analysis and Manufacturing Technology TEAM-TECH-2009 Bangalore was adjudged as best technical paper and awarded a prize

Before and after wear testing samples were cleaned with brush to remove wear debris The wear has been measured by the loss in weight (Mettler: TOLEDO 0 1 mg accuracy) The differences in the weight measured before and after the test gave the dry sliding wear loss of the composites which has been converted into the volume loss

Using friction force microscopy we compared the nanoscale frictional characteristics of atomically thin sheets of graphene molybdenum disulfide (MoS2) niobium diselenide and hexagonal boron nitride exfoliated onto a weakly adherent substrate (silicon oxide) to those of their bulk counterparts Measurements down to single atomic sheets revealed that friction monotonically increased as the

2017-9-27R Ramesh R Gnanamoorthy (2007) 'Effect of hardness on fretting wear behaviour of structural steel En24 against bearing steel En31' Mat Design 28 1447 S Dhanasekaran and R Gnanamoorthy (2007) 'Dry sliding friction and wear characteristics of Fe-C-Cu alloy containing molybdenum di sulphide' Mat Design 28 1135-1141 [JIF=0 785]

2017-7-1In this study dry sliding wear behaviour of the carbon steel Fe-0 25C (Alloy 1) and microalloyed steels Fe-0 25C-0 1Nb-Al (Alloy 2) Fe-0 25C-0 15Nb-Al (Alloy 3) Fe-0 25C-0 2Nb-Al (Alloy 4) was investigated The effect of Nb and Al addition on hardness and wear properties of produced PM steels was discussed 2 Experimental procedure

Mobased composite surfacemodifying coating containing MoS2 was prepared on 1045 steel by multiarc ion plating and low temperature ion sulfurization The phase composition and elemental depth profiles of the resulting coatings were analyzed by means of Xray diffraction and Auger electron spectroscopy The tribological properties of the composite coating sliding against SAE52100 steel under

Mobased composite surfacemodifying coating containing MoS2 was prepared on 1045 steel by multiarc ion plating and low temperature ion sulfurization The phase composition and elemental depth profiles of the resulting coatings were analyzed by means of Xray diffraction and Auger electron spectroscopy The tribological properties of the composite coating sliding against SAE52100 steel under

Scientists have studied friction and wear from the late fifteenth century when Leonardo da Vinci developed the first friction model More recently in 1966 H Peter Jost coined the new word Tribology to indicate the combined effect of friction and wear that influences the strength of materials