Production of Babbitt Coatings by High Velocity Oxygen Fuel (HVOF) Spraying

Nascimento, Alexandre Romão Costa; Ettouil, Fadhel Ben; Moreau, Christian; Savoie, S.; Schulz, Robert

doi:10.1007/s11666-017-0615-9

Cited by 10 publications

(6 citation statements)

References 16 publications

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“…Moreover, the authors proved that the rate of tin Babbitt wear depends on the wear rate of β phase particles (SnSb). Similarly, works [ 6 , 7 , 8 , 9 ] present the influence of coating application methods on the microstructure and properties of Babbits. Additionally, the positive effect of changing the morphology of SnSb precipitates on reducing the tribological wear was also presented in [ 2 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of FSP on Tribological Properties of Grade B89 Tin Babbitt

et al. 2021

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The article presents the results of tests of the tribological properties of a bearing alloy on a tin matrix (B89) after surface modification by means of friction stir processing (FSP) with a Whorl tool. The samples were processed using two tool speeds of 280 and 580 RPM and a constant linear speed of 355 mm/min. The obtained results proved the significant influence of FSP on both the morphology of the precipitates and the investigated properties. Changes in the nature and course of friction were also observed, including the participation of individual wear mechanisms in the studied test conditions. The use of the 560 RPM tool rotation speed reduces the friction coefficient and the weight loss by about 30%. The flexural strength was also increased from 123 to 307 MPa.

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Section: Introductionmentioning

confidence: 99%

Effect of FSP on Tribological Properties of Grade B89 Tin Babbitt

et al. 2021

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“…The volume fraction and mass (material density and powder size) of the blended (mixed in) hard particles have not yet been sufficiently researched.Depositing Sn-based Babbitt as a plain bearing material using LPCGDS is a very promising field of application. Despite its relatively higher cost, Sn-based Babbitt alloys reveal a low hardness, abrasion resistance to steel, low stiffness, excellent corrosion resistance, good embedding ability of foreign particles, less tendency towards segregation, and last but not least low coefficient of friction [19][20][21]. Therefore, Babbitt as an alloy is mainly used as a sliding layer in plain hydrodynamic bearings to reduce friction [19].…”

Section: Introductionmentioning

confidence: 99%

“…Despite its relatively higher cost, Sn-based Babbitt alloys reveal a low hardness, abrasion resistance to steel, low stiffness, excellent corrosion resistance, good embedding ability of foreign particles, less tendency towards segregation, and last but not least low coefficient of friction [19][20][21]. Therefore, Babbitt as an alloy is mainly used as a sliding layer in plain hydrodynamic bearings to reduce friction [19]. Babbitt, in general, consists mostly of the elements tin (Sn), copper (Cu), and antimony (Sb).…”

Section: Introductionmentioning

confidence: 99%

Embedding Behavior of Ceramic Particles in Babbitt Coatings and Its Effect on the Tribological Properties of Low-Pressure Cold Sprayed Coatings

et al. 2020

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The low melting point of Sn-based Babbitt alloys often causes nozzle clogging in the low-pressure cold gas-dynamic spraying (LPCGDS) process, which impacts the process steadiness and the coating quality. Adding hard particles to the feedstock material eliminates this kind of interruption. A certain amount of these particles finds their way in the obtained coatings. These particles also trigger a kind of “hammering effect” due to their impulse forces. These forces are directly dependent on the mass and velocity of the impacting hard particles. However, these forces may lead to a decrease in the porosity and improve the adhesion of the obtained coating. In this study, the effect of the density and size of the hard particle was examined by three different hard materials, Cr3C2, Al2O3, and B4C, which have a material density of 6.68, 3.95, and 2.52 g/cm3, respectively. The used feedstock in this study is a powder mixture that contains 75 vol.% Babbitt and 25 vol.% of either B4C, Cr3C2, or Al2O3. The effect of the size distributions “particles with lower mass” was tested using two different Al2O3. The various hard particles show different embedding behaviors, as well as different effects on the coating build-up. It was found that the blended hard particles were enclosed with the Babbitt matrix, and their interface with Babbitt shows no clear evidence of pronounced diffusion. The size distribution of the blended hard particles has a direct effect on the splat formation and the obtained coating microstructure. It was found that the type of hard particles played a decisive role in the friction behavior. Nevertheless, the hard particle reinforced Sn-Sb-Cu-based composite coatings demonstrated a nearly constant coefficient of friction throughout the load-interval.

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“…Therefore, Babbitt coatings serve as a sacrificial surface [8]. In the event of unwanted contact with the more expensive counterpart, the softer Babbitt surface wears out to protect the counterpart from significant damage [9], or to permit deformation to accommodate some misalignment of the bearing surfaces [10]. Moreover, the soft solid solution matrix provides the ability to act as a solid lubricant and allows the embedding of abrasive particles, whereas the intermetallic phases dispersed in the matrix largely determine the resulting hardness and thus have a substantial influence on the maximum load carrying capacity [11].…”

Section: Introductionmentioning

confidence: 99%

“…In the field of thermal spraying, Babbitt coatings are commonly deposited by using flame spraying [12], plasma spraying [13], high velocity oxy-fuel spraying [9] and arc spraying [12]. To date, only a very few studies have paid attention to Sn-Sb-Cu-based Babbitt coatings deposited by means of LPCS and reported the microstructural properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characteristics in Babbitt Coatings Deposited by LPCS

et al. 2020

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Studies have already established that the mechanical properties of Babbitt coatings significantly depend on the microstructural characteristics, such as the amount and distribution of intermetallic compounds dispersed in a soft solid solution matrix. For Sn–Sb–Cu-based Babbitt coatings, the formation of SbSn- and CuSn-based precipitates has a substantial influence on the resulting microhardness and thus determines the maximum load carrying capacity. Thermal spraying of Sn-based Babbitt coatings results in a relatively more refined structure of these precipitates than in common manufacturing processes, such as casting, due to the thermal processing conditions. This study aims to evaluate the effect of the temperature of the propellant gas and substrate temperature on the microstructural characteristics of Sn–Sb–Cu-based Babbitt coatings deposited by low pressure cold spraying (LPCS). The deposits were examined for their phase composition, microhardness and mesoscopic structure. It was found that the coatings were mainly composed of Sb2Sn23, Sb0.49Sn0.51 and Sorosite (CuSn or CuSb0.115Sn0.835), regardless of the substrate temperature or temperature of the propellant gas to be investigated. For a gas temperature above 300 °C, an increased microhardness was observed, which correlates with the appearance of a more homogenous distribution of Sb0.49Sn0.51 dispersed in a soft Sn-rich solid solution matrix.

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Production of Babbitt Coatings by High Velocity Oxygen Fuel (HVOF) Spraying

Cited by 10 publications

References 16 publications

Effect of FSP on Tribological Properties of Grade B89 Tin Babbitt

Effect of FSP on Tribological Properties of Grade B89 Tin Babbitt

Embedding Behavior of Ceramic Particles in Babbitt Coatings and Its Effect on the Tribological Properties of Low-Pressure Cold Sprayed Coatings

Microstructural Characteristics in Babbitt Coatings Deposited by LPCS

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