Frictional properties and wear of a molybdenum coating and a bronze (Cu-10%Sn) with friction modifier fillers

Tura, J.M.; Traveria, A.; Castellar, M. D. de; Pujadas, J.; Blouet, J.; Gras, R.; Magham, H. Ghaem; Belair, P.; Hanau, T.; Romero, A.

doi:10.1016/0043-1648(95)06647-0

Cited by 16 publications

(4 citation statements)

References 4 publications

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“…However, in some cases, high abrasion resistance is also required, but its limited hardness makes it very sensible to wear [4]. In order to increase the wear resistance it is possible to use a hard reinforcing phase in the metallic bronze matrix or even, the use of friction modifier fillers for lubricated tribological systems [5]. The reinforcing phase can be in form of continuous fibers or discontinuous particles (e.g., in thermal spraying).…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior of Bronze Composite Coatings Obtained by Plasma Thermal Spraying

et al. 2011

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Bronze aluminum composite coatings containing different amounts of alumina were fabricated by plasma spray process and their tribological properties were investigated using ball-on-disk (BOD) and rubber wheel (RW) tests at room temperature. Main wear mechanisms in pure bronze coatings during the ball-on-disk friction test were abrasion and intersplat delamination. The addition of alumina in bronze coatings clearly enhances their wear resistance. To explain this behavior, this article proposes an additional wear mechanism in the composite coatings that involves the rupture of the alumina lamellae located just below the wear track leading to a uniform distribution of fine alumina particles enveloped by the bronze matrix, which increase the surface hardness and hinder the wear. The deposition of debris on the wear track of composite coatings provokes an enhancement of the wear resistance as well. Bronze coatings show a low and stable friction coefficient of around l = 0.3. Nevertheless, coatings with reinforcing particles of alumina show an abrupt transition in the friction coefficient from values around l = 0.4-0.8, related to the modification of the surface contacts on the wear track due to the formation of a compacted debris layer deposited during the tribological test.

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Section: Introductionmentioning

confidence: 99%

Tribological Behavior of Bronze Composite Coatings Obtained by Plasma Thermal Spraying

et al. 2011

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“…Ko and Robertson [2] investigated the sliding wear properties of hard chrome and thermally sprayed tungsten carbide coatings against Al-Ni-bronze. The molybdenum as well as bronze is characterized by low friction coefficient [3]. They might be deposited using thermal sprayed processes [4,5].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Plasma Spraying Parameters on Microstructure and Porosity of Bronze-Polyester Coatings for Plain Bearings Applications

Góral,

Kubaszek,

Kościelniak

et al. 2024

SSP

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The plasma sprayed bronze coatings are widely used for repairing of plain bearing used in different applications. This type of coating was not deeply analyzed in state-of-art publications. In presented article we fill this gap in the case of plasma spraying process. The influence of power current (300/500/700A) and hydrogen flow (0/4/8 NLPM) on microstructure and thickness of aluminium bronze-polyester coating was investigated. The Thermico A60 plasma torch was used for thermal spray process of coating on flat carbon steel samples (grade S355). The Metco 604NS was sprayed with 20g/min powder feed rate. The obtained results showed the presence of local large pores formed by burning of polyester in plasma plume. This gap makes role of oil pockets in bearings. The obtained coatings were characterized by large deviation in thickness in range 200-350 micrometers. It might be concluded that in requires additional milling process after deposition.

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“…In the past, there were researches aiming to improve wear resistance of the traditional tin bronze. Example were addition of P, Fe, and Mn to improve abrasive wear resistance [2], embedding by chromium-molybdenum steel particles to reduce wear rate under lubricated sliding [3], and alloyment with nickel to produce a spinodally hardened alloy [4]. Since alloyment with aluminum in copper matrix, making aluminum bronze, yields the alloy a very high hardness.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum Addition to Cu-10wt%Sn Bearing on its Pin-on-Disc Wear Behavior

Chobaomsup

Luangvaranunt

2010

AMR

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The objective of this research was to study effect of sintering time, sintering temperature and aluminum addition on pin-on-disc wear behavior of Cu-10wt%Sn bearing that was produced from powder metallurgy method. It was found that, for the as-sintered samples, the larger addition of aluminum, the greater reduction in density and hardness in all sintering conditions. Density and hardness of samples sintered at 900°C decreased with increasing sintering time. Density and hardness of samples sintered at 830°C increased with increasing sintering time. Maximum hardness was obtained when the samples were sintered at 900°C for 30 min or sintered at 830oC for 60 min. Heat treating the samples by annealing at 750oC for 1 h, and quenching in water improved the hardness of the samples alloyed with aluminum significantly. Hardness of 5wt%Al sample increased by 37% to 69.2 HV. Wear mode of samples without aluminum addition was abrasive with accumulation of α-phase wear debris on worn pin surface. For samples with aluminum addition, wear mode was abrasive-oxidative producing clean worn surface which was preferred for self-lubrication mechanism of this type of bearing.

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Frictional properties and wear of a molybdenum coating and a bronze (Cu-10%Sn) with friction modifier fillers

Cited by 16 publications

References 4 publications

Tribological Behavior of Bronze Composite Coatings Obtained by Plasma Thermal Spraying

Tribological Behavior of Bronze Composite Coatings Obtained by Plasma Thermal Spraying

The Influence of Plasma Spraying Parameters on Microstructure and Porosity of Bronze-Polyester Coatings for Plain Bearings Applications

Effect of Aluminum Addition to Cu-10wt%Sn Bearing on its Pin-on-Disc Wear Behavior

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