Reducing the Magnetic Tape/Guide Friction Coefficient by Laser Surface Texturing: Experimental Analysis

2007 ◽  
Author(s):  
Bart Raeymaekers ◽  
Izhak Etsion ◽  
Frank E. Talke
Keyword(s):  
Friction Coefficient ◽  
Experimental Analysis ◽  
Magnetic Tape ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Air Bearing ◽  
Surface Features

The friction coefficient is an important parameter in designing magnetic tape transports. We have introduced laser surface texturing to reduce the friction coefficient between guides and magnetic tape. The surface features enhance the formation of an air bearing and hence, reduce the friction coefficient.

A Model for the Magnetic Tape/Guide Interface With Laser Surface Texturing

2007 ◽  
Author(s):  
Bart Raeymaekers ◽  
Izhak Etsion ◽  
Frank E. Talke
Keyword(s):  
Magnetic Tape ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Air Bearing

The spacing between a magnetic tape and a guide in a tape path can be increased by creating dimples on the guide surface. The dimples enhance the formation of an air bearing. A model is presented to maximize the average air bearing pressure.

scholarly journals Fabricating the Superhydrophobic Nickel and Improving Its Antifriction Performance by the Laser Surface Texturing

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1155 ◽  
Author(s):  
Junyuan Huang ◽  
Songbo Wei ◽  
Lixin Zhang ◽  
Yingying Yang ◽  
Song Yang ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Contact Area ◽  
Fluid Dynamic ◽  
Surface Texturing ◽  
High Energy ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Nickel Surface ◽  
Water Droplets ◽  
Groove Texture

The superhydrophobic surface can change the friction property of the material, reduce the adhesion of the friction interface, and produce a certain slip, thereby reducing the friction coefficient. The laser has high energy, high density, and is especially suitable for the surface treatment of materials. The laser surface texturing is a good way to construct superhydrophobic surfaces. The experiment uses a nanosecond pulse laser to construct the groove texture on the nickel surface. The contact area between the air and the droplets retained on the rough surface is increased, effectively preventing the water droplets from entering the gully of the surface microstructure, reducing the water droplets and the solid surface. The contact area ultimately makes the surface exhibit excellent superhydrophobicity. A superhydrophobic nickel surface having an apparent contact angle of water (ACAW) of 160° and a sliding angle (SA) of less than 10° was prepared. The MM-W1B vertical universal friction and wear tester was used to test the groove texture samples with different depths. The surface texture can capture the wear debris generated by the wear and store the lubricant, which is beneficial to the formation of fluid dynamic pressure lubrication and improve the load. The friction coefficient is reduced from 0.65 of the unprocessed surfaces to 0.25 after the texturing, and the friction performance is greatly improved.

scholarly journals Corrosion Wear Performance of Pure Titanium Laser Texturing Surface by Nitrogen Ion Implantation

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 990 ◽  
Author(s):  
Lin Cao ◽  
Yun Chen ◽  
Jie Cui ◽  
Wei Li ◽  
Zhidan Lin ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Ion Implantation ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Textured Surface ◽  
Artificial Joints ◽  
Nitrogen Ion Implantation ◽  
Nitrogen Ion

The poor tribological performances of titanium have significantly limited its applications in the field of artificial joints. In order to solve problems regarding the wear and corrosion of artificial joints in the body, we fabricated the composite materials utilizing the combination of laser surface texturing and nitrogen ion implantation technology, and investigated the effect of laser surface texturing, nitrogen ion implantation, and different dimple area densities on tribological performance. The results show that the textured surface could reduce the friction coefficient and improve the wear resistance, and the optimum dimple density was found to be 25%. After N ion implantation, the wear resistance of the textured sample was further improved, due to the formation of the nitride layer. Moreover, as shown by the electrochemical test results, the corrosion resistance was enhanced significantly. The friction coefficient decreased the most, and the wear resistance increased by 405% with the lowest wear rate of 0.37 × 10−3 mm3/N·m. However, the specimen with a dimple density of 60% had the worst wear resistance. The results of the study provide a basis for the development and application of artificial joint materials.

scholarly journals Experimental Analysis of Microstructured Steel Surfaces for Wet Tribological Applications in the Low Velocity Regime

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Mateusz Chlipala ◽  
Johannes Schneider ◽  
Volker Schulze
Keyword(s):  
Friction Coefficient ◽  
Wear Debris ◽  
Laser System ◽  
Surface Texturing ◽  
Picosecond Laser ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Low Velocity ◽  
Pin On Disc ◽  
Steel Surfaces

The surface topography plays an important role in the design of a function-optimised surface. Therefore, the influence of topography with microsized structures produced by laser surface texturing (LST) is experimentally examined under lubricated sliding conditions. The structured specimens were made of AISI 51200 (DIN 100Cr6) hardened to about 800 HV. Concerning the requirements of tribological testing without any debris caused by the preprocessing, the structuring was carried out using a picosecond laser system (Trumpf TruMicro) with 6 ps pulse duration. A laboratory pin-on-disc tribometer (Plint TE-92 HS) was used for the tests, which were run under wet conditions with counterbodies made of bronze and steel at a nominal contact pressure of up to 4 MPa and sliding speeds between 0.04 and 2.0 m/s. Furthermore, start-stop cycles with accelerating and decelerating shares were used to simulate an automotive start-stop system. In the tribological experiments, a significant reduction of the friction coefficient was observed compared to sliding pairs without microstructured pin surfaces. Whereas no measureable wear occurred on the steel pins and discs, the bronze discs showed a significant amount of wear and the microstructures on the pin surfaces mated against bronze discs were almost completely filled with wear debris.

A Model for Magnetic Tape/Guide Friction Reduction by Laser Surface Texturing

2007 ◽  
Vol 28 (1) ◽  
pp. 9-17 ◽  
Author(s):  
Bart Raeymaekers ◽  
Izhak Etsion ◽  
Frank E. Talke
Keyword(s):  
Magnetic Tape ◽  
Surface Texturing ◽  
Laser Surface ◽  
Friction Reduction ◽  
Laser Surface Texturing

Effect of laser surface texturing on tribological properties of polyimide composites in the application of traveling wave rotary ultrasonic motor

2018 ◽  
Vol 70 (4) ◽  
pp. 569-577 ◽  
Author(s):  
Xiaoliang Liu ◽  
Gai Zhao ◽  
Jinhao Qiu
Keyword(s):  
Friction Coefficient ◽  
Tribological Properties ◽  
Traveling Wave ◽  
Surface Texturing ◽  
Ultrasonic Motor ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Content Type ◽  
Output Performance ◽  
Polyimide Composites

Purpose The purpose of this paper is to investigate the effect of laser surface texturing on the tribological properties of polyimide composites and the output performance of traveling wave rotary ultrasonic motor. Design/methodology/approach The surface texturing on polyimide composites specimens were fabricated by laser ablation process of different dimple densities, and then the tribological properties were tested by a flat-on-flat tribometer under dry conditions. Finally, the output performance of the traveling wave rotary ultrasonic motor was tested to verify the effectiveness of dimples surface texturing. Findings The results show that surface texturing can greatly enhance the friction coefficient of contact interface, especially the specimen with a dimple density of 7.06 per cent exhibited the highest friction coefficient among the specimens. When the input voltage is 500 V, the output power, locked-rotor torque and output torque of ultrasonic motor with textured PI of 7.06 per cent dimple density as friction material at the speed of 100 r/min increased by 13.8, 19 and 12.8 per cent compared to that of the untextured PTFE, respectively. When the ultrasonic motor reverses, the output performance is increased by 20.9, 40.3 and 17.7 per cent, respectively. Originality/value Surface texturing is an effective way to improve the friction behavior of polyimide composites and then correspondingly enhance the energy conversion efficiency and output performance of the traveling wave rotary ultrasonic motor.

scholarly journals Does laser surface texturing really have a negative impact on the fatigue lifetime of mechanical components?

Friction ◽  
2021 ◽  
Author(s):  
Chia-Jui Hsu ◽  
Andreas Stratmann ◽  
Simon Medina ◽  
Georg Jacobs ◽  
Frank Mücklich ◽  
...  
Keyword(s):  
Boundary Lubrication ◽  
Surface Texturing ◽  
Contact Stresses ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Wear Loss ◽  
Textured Surface ◽  
Periodic Patterns ◽  
Rolling Bearings ◽  
Fatigue Lifetime

AbstractLaser surface texturing (LST) has been proven to improve the tribological performance of machine elements. The micro-scale patterns manufactured by LST may act as lubricant reservoirs, thus supplying oil when encountering insufficient lubrication. However, not many studies have investigated the use of LST in the boundary lubrication regime, likely due to concerns of higher contact stresses that can occur with the increasing surface roughness. This study aims to examine the influence of LST on the fatigue lifetime of thrust rolling bearings under boundary lubrication. A series of periodic patterns were produced on the thrust rolling bearings, using two geometrically different designs, namely cross and dimple patterns. Base oil ISO VG 100 mixed with 0.05 wt% P of zinc dialkyldithiophosphate (ZDDP) was supplied. The bearings with cross patterns reduce the wear loss by two orders of magnitude. The patterns not only retain lubricant in the textured pockets but also enhance the formation of an anti-wear tribofilm. The tribofilm generation may be improved by the higher contact stresses that occur when using the textured surface. Therefore, in contrast to the negative concerns, the ball bearings with cross patterns were instead found to increase the fatigue life by a factor of three.

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