Effects of Surface Roughness and Manganese Phosphate Coating on Friction and Wear Characteristics

Ono, Masahiko; Inoue, Youichi

doi:10.4139/sfj.56.52

Cited by 3 publications

(6 citation statements)

References 3 publications

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“…The Ra and Rz values of PTFE (Ra; <1.0 μm, and Rz; <8 μm), were higher than the other specimens, which all recorded similar lower values for surface roughness. Specimens with a rough surface generally exhibit wear more readily 21) . However, despite the high surface roughness of PTFE compared to other specimens, it exhibited low wear, signifying extremely high wear resistance compared to other specimens (Tables 1, 2).…”

Section: Discussionmentioning

confidence: 99%

Polytetrafluoroethylene (PTFE): A resin material for possible use in dental prostheses and devices

Kameda

Ohkuma

Oka

2019

Dental Materials Journal

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Polytetrafluoroethylene (PTFE) is chemically stable, non-toxic to humans, highly resistant to heat and chemicals, and has an extremely low coefficient of friction. Therefore, PTFE is used in medical applications. We focused on the physical properties of PTFE in relation to its application as a material for use in prostheses and dental devices/instruments. PTFE exhibited low wear (approximately 1/3 that of bovine tooth, and 1/2 that of type III gold alloy), low dynamic friction (approximately 1/5 that of the other specimens), low hardness (4.8HV1.0), low coloration, and low bacterial adhesion, compared to other specimens except porcelain in wear and coloration test (p<0.01). These results suggest that PTFE could have applications in some prostheses for provisional and/ or permanent use, and dental instruments/devices by providing excellent impact absorption, high wear resistance for maintenance of occlusal vertical dimension and original function, and ease of cleaning.

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Section: Discussionmentioning

confidence: 99%

Polytetrafluoroethylene (PTFE): A resin material for possible use in dental prostheses and devices

Kameda

Ohkuma

Oka

2019

Dental Materials Journal

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“…This peak detection method is explained using a model surface (13 × 13 pixels), where the peak is present at the coordinates (4,4) and (10,10), as shown in Fig. 11 (a).…”

Section: Methods IIImentioning

confidence: 99%

“…First, the search area was a 3 × 3 pixels square. The coordinates (x, y) of and (4,4,9). When the center pixel is (x, y, z) = (2, 2, 2), because pixels with z = 4 and 7 are at higher positions than the center pixel (z = 2) in the search area, the center pixel at (2, 2, 2) is not determined to be a peak.…”

Section: Methods IIImentioning

confidence: 99%

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Development of Method for Measuring Minute Wear of Roughness Peaks of Underlying Steel Exposed on Soft Material-Covered Steel Surface

Nagahashi,

Masuko,

Yamamoto

et al. 2023

Tribology Online

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This paper reports a novel method to measure the very small amount of wear that occurred at roughness peaks of the underlying base steel exposed on the surface covered with a soft material film removed by sliding. It is impossible to detect the minute wear of the exposed roughness peaks by a known method so far. Image data with three-dimensional height information obtained by a laser microscope is used to detect the position and height of roughness peaks of the underlying base steel exposed on the surface. This method makes it possible to track the minute wear progress using the mean height of all the detected roughness peaks or the wear of detected specific roughness peaks. It was also reported that this method has generality to be applied to untreated steel surfaces. It was possible to detect tiny distinctions of wear by this method. Then it was clarified that the wear of steel exposed on the MnP-treated surface is greater than that of the untreated steel, especially it was remarkable in the initial stage of sliding.

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“…Although the MnP coating on the top surface is gradually worn away and the substrate appears, anti-wear performance is maintained for a long duration owing to the oil supply effect from the residual MnP in the etching pits, which play a role in oil reservoirs [7]. Ono et al [8] reported that sliding pairs, with a combination of rough and smooth surfaces prepared by turning, show low-stable friction over a wide range of low to high contact pressures, when either the rough or the smooth surface is coated with MnP.…”

Section: Introductionmentioning

confidence: 99%

Influence of Wear Surface Morphology and Phosphorus-Containing Tribofilm on Crack Initiation of Manganese Phosphate Coated Steel under Rolling–Sliding Contact

et al. 2020

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To improve the rolling-sliding contact fatigue strength of a case-carburized steel, the effect of the wear surface morphologies of manganese phosphate (MnP) coated steel and the growth and removal of phosphorus-containing tribofilm on surface-initiated crack formation was investigated. In order to modify the wear surface morphologies, two types of surface textures (ground and shot blasted) were prepared, followed by the MnP coating process. The tribological properties of the coated steel, tribofilm growth and removal, and surface-initiated crack formation were evaluated using a ball-on-disk tribometer with a rolling-sliding mode. The MnP coating on both the ground and shot blasted steel had nearly the same thickness and surface roughness. However, for the ground surface sample, the interface morphology between the coating and steel substrate was more irregular than the shot blasted surface sample, resulting in a larger number of exposed steel areas with smaller sizes after the MnP was almost worn away on tribological tests. During the runningin period, phosphorus-containing tribofilm growth and removal on the smaller exposed steel areas were observed. The surface-initiated crack formation on the smaller exposed steel areas was suppressed compared with larger exposed steel areas.

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Effects of Surface Roughness and Manganese Phosphate Coating on Friction and Wear Characteristics

Cited by 3 publications

References 3 publications

Polytetrafluoroethylene (PTFE): A resin material for possible use in dental prostheses and devices

Polytetrafluoroethylene (PTFE): A resin material for possible use in dental prostheses and devices

Development of Method for Measuring Minute Wear of Roughness Peaks of Underlying Steel Exposed on Soft Material-Covered Steel Surface

Influence of Wear Surface Morphology and Phosphorus-Containing Tribofilm on Crack Initiation of Manganese Phosphate Coated Steel under Rolling–Sliding Contact

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