Surface textures fabricated by laser and ultrasonic rolling for improving tribological properties of TiAlSiN coatings

This paper is about the KF301/WS2 modified lubricating wear-resisting coating which is prepared by supersonic plasma spraying, laser remelting and surface texturing technology, tribological characteristic of KF301/WS2 lubricating wear-resisting coating of four different (round pit, diamond, parallel and intermittence) tracks and part laser remelting is studied under room temperature. Research shows: textures of different tracks have a certain influence on friction factor of coating’s surface and abrasion loss. Friction coefficient of mouldling surface of broken texture is about 0.012 in the initial stages, while friction coefficient of round pit texture is about 0.0085. Round pit, diamond and parallel microtopography make friction state enter stabilization quickly, effectively restraining the wave of abrasion loss. When wear time reaches to 1 hour, abrasion loss of broken texture is 0.03mg, while abrasion loss of round pit texture is about 0.015mg. Tribological properties, from high to low, in turn, are round pits, diamond, parallel and broken texture.

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Lubricated Friction Reduction by Spiral-Groove-Shape Nano-Texturing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.516.431 ◽

2012 ◽

Vol 516 ◽

pp. 431-436 ◽

Cited By ~ 2

Author(s):

Yusuke Tanaka ◽

Kazuma Okada ◽

Tomoko Hirayama ◽

Takashi Matsuoka ◽

Hiroshi Sawada ◽

...

Keyword(s):

Femtosecond Laser ◽

Tribological Properties ◽

Friction Reduction ◽

Fluid Film ◽

Spiral Groove ◽

Low Friction ◽

Surface Textures ◽

Lubrication Film ◽

Sliding Surfaces ◽

Effect Of Surface

To effectively reduce the friction in machines operating under lubrication, the sliding surfaces should be fully fluid-film lubricated. Under the full fluid-film lubricated conditions, the upper surface is completely supported by the lubrication film formed in the gap between the surfaces, resulting in low friction and no wear. Surface texuturing is a promising way to modify the tribological properties of sliding surfaces, and a technique for fabricating surface textures with a nanometre-order depth using a femtosecond laser can be used to easily and quickly produce periodic grooves in metal surfaces. It can thus be applied to industrial sliding surfaces to improve their tribological properties. The purpose of the study is to verify the effect of surface nanotextures fabricated using a femtosecond laser to reduce friction under lubrication. As a result, the two disks continued to operate under full fluid-film lubricated conditions even when the bearing clearance became quite small, less than 200 nm. Our testing showed that grooves with a nanometre-order depth can support a higher load than ones with a micrometre-order depth, and we proved that nanotexture can expand the full-lubricated condition.

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Effect of laser surface textures combined with multi-solid lubricant coatings on the tribological properties of Al2O3/TiC ceramic

Wear ◽

10.1016/j.wear.2015.08.002 ◽

2015 ◽

Vol 342-343 ◽

pp. 1-12 ◽

Cited By ~ 25

Author(s):

Youqiang Xing ◽

Jianxin Deng ◽

Xingsheng Wang ◽

Rong Meng

Keyword(s):

Tribological Properties ◽

Solid Lubricant ◽

Laser Surface ◽

Surface Textures

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Variations in Surface Textures of Quartz Sand using Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069466 ◽

1970 ◽

Vol 28 ◽

pp. 494-495

Author(s):

Eugene J. Amaral

Keyword(s):

Electron Microscopy ◽

Glass Industry ◽

Glass Slide ◽

Distilled Water ◽

Early Paleozoic ◽

Secondary Effects ◽

Surface Textures ◽

High Silica ◽

Sand Deposit ◽

The U.S

Examination of sand grain surfaces from early Paleozoic sandstones by electron microscopy reveals a variety of secondary effects caused by rock-forming processes after final deposition of the sand. Detailed studies were conducted on both coarse (≥0.71mm) and fine (=0.25mm) fractions of St. Peter Sandstone, a widespread sand deposit underlying much of the U.S. Central Interior and used in the glass industry because of its remarkably high silica purity.The very friable sandstone was disaggregated and sieved to obtain the two size fractions, and then cleaned by boiling in HCl to remove any iron impurities and rinsed in distilled water. The sand grains were then partially embedded by sprinkling them onto a glass slide coated with a thin tacky layer of latex. Direct platinum shadowed carbon replicas were made of the exposed sand grain surfaces, and were separated by dissolution of the silica in HF acid.

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