Fabrication and tribological behaviors of corner-cube-like dimple arrays produced by laser surface texturing on medical needles

Wang, Xinsheng; Giovannini, Marco; Xing, Youqiang; Kang, Min; Ehmann, Kornel F.

doi:10.1016/j.triboint.2015.07.042

Cited by 35 publications

(9 citation statements)

References 23 publications

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“…1 a, b, c, d), especially anisotropic dimple shapes. For examples, triangular [35][36][37][38][39][40] and chevron shapes [18,41,42] (shown in Fig. 1 c, and d).…”

Section: Introductionmentioning

confidence: 99%

The use of anisotropic texturing for control of directional friction

Lu¹,

Wood²,

Gee

et al. 2017

Tribology International

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This paper presents a study on the influence of anisotropically shaped texture arrays on friction behaviour of an oil lubricated sliding contact, especially on directional friction control based on the diverging and converging characteristics of the textures. Experiments have been conducted on a TE77 reciprocating cylinder-on-plate test rig, where steel rollers were used to slide against steel plate samples with or without textures. A mineral base oil was used to lubricate the contacts. Three geometries of dimples were designed and laser textured on the steel plate samples with varied 3-dimensional features, including Square Flat (SF), Square slope (SS) and Triangular Flat (TF) shapes representing the shape in x-y (top view) and x-z (side view) planes respectively. These shapes were chosen to vary the converging and diverging properties of the lubricated contacts depending on the sliding direction. Relatively large dimple sizes (side length ~ and depth ~ ) have been used in this study to enable observation of the effect and easy control of the texturing process. The texture density has been kept at as most literature suggested. The large dimple sizes resulted that the dimples were not be fully covered by the contact area, i.e. the dimple sides were bigger than the Hertzian contact width of the roller-flat contacts. This has eliminated the 'lift' or 'load bearing' effect discussed in most papers thus focuses on other effects investigated in this study. The results show that beneficial effects of the anisotropic textures present in all lubrication regimes including the boundary, mixed and hydrodynamic lubrications, especially under prevailing boundary lubrication conditions. Using high sampling rate for the friction data during the tests, it was able to study local friction effect due to individual dimple array especially at their leading and trailing edges. The results show that a local friction reduction is observed at the leading while an increase at the trailing edge. Overall directional friction effect of the anisotropic textures has been observed that the converging shape in both y-z plane and the x-y plane reduces friction. Furthermore, it was found that the triangular shape dimples have a greater local frictional response at each dimple array, while the sloped bottom square dimples have a more significant overall directional fricition effect.

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“…1 a, b, c, d), especially anisotropic dimple shapes. For examples, triangular [35][36][37][38][39][40] and chevron shapes [18,41,42] (shown in Fig. 1 c, and d).…”

Section: Introductionmentioning

confidence: 99%

The use of anisotropic texturing for control of directional friction

Lu¹,

Wood²,

Gee

et al. 2017

Tribology International

View full text Add to dashboard Cite

show abstract

“…Furthermore, the bright colors at the edges of the pits indicated that they were worn heavily. This is because the edges of the pits were sharp and could behave as 'cutting edges' that scratched the other surface, resulting in the concentration of stress along with wear [38]. In the meanwhile, the micro-cutting effect at the the edges of the pits increased the friction coefficient [39][40].…”

Section: Weight Loss (Mg)mentioning

confidence: 99%

Influence of bionic non-smooth surface texture on tribological characteristics of carbon-fiber-reinforced polyetheretherketone under seawater lubrication

Wang

Wood

et al. 2020

Tribology International

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To explore anti-wear characteristics for valve pair, the influences of smooth and non-smooth surfaces on tribological properties of the carbon-fiber-reinforced polyetheretherketone (CFRPEEK) coupled with stainless steel 316L were investigated under natural seawater lubrication. The results show that the specimen with ellipsoidal pits has the best frictional performance, followed by the specimen with triangular pits, and the specimen with hemispherical pits is the worst. Microscope observation analysis showed that the reasonable non-smooth surface can reduce adhesion wear and improved the stability of friction system as compared to smooth surface. Results also indicated that the reasonable non-smooth unit can effectively store seawater and debris, and produce hydrodynamic lubrication effect, which surface shows the excellent tribological properties.

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“…2, and the size was 600×450×935 mm 3 . Concerning exposure systems for printing or delineating patterns on a cylindrical specimen, various research results have been reported [14][15][16][17][18]. The authors have developed some systems also except the above mentioned ones [19][20][21][22].…”

Section: Resist Patterning Using Synchronized Scan Rotation Lithographymentioning

confidence: 99%

Fabrication of Stent-Like Mesh Structures Using Synchronized Scan Rotation Lithography and Wet Etching

Horiuchi

Ito

Suzuki

et al. 2020

J. Photopol. Sci. Technol.

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Stent-like complicated cylindrical structures were made with pipes of stainless-steel SUS 304 using new lithography and wet chemical etching. In the new lithography, patterns on a flat reticle were printed on a pipe coated with a resist film by synchronously scanning the reticle linearly and rotating the pipe around the axis, and limiting the momentary exposure area on the top ridge of the pipe by placing an oblong slit on the reticle in parallel to the pipe axis. The patterned pipe was wetly etched in an aqueous solution of ferric chloride using the resist patterns as etching masks. Because the etching was progressed equally in all the directions from the resist pattern edges, masked parts under the resist patterns were also gradually etched from the pattern edges and undercut during the pipe was penetrated through the wall. Caused by the undercut, obtained mesh widths became narrower than the resist pattern widths. However, a stent-like mesh structure with widths of 108±12.4 (3σ) µm was decently fabricated by appropriately controlling the resist pattern width and the etching time. To attain higher accuracy in the future, cross section profiles of the mesh and relationship between resist pattern widths and mesh widths were discussed in detail.

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Fabrication and tribological behaviors of corner-cube-like dimple arrays produced by laser surface texturing on medical needles

Cited by 35 publications

References 23 publications

The use of anisotropic texturing for control of directional friction

The use of anisotropic texturing for control of directional friction

Influence of bionic non-smooth surface texture on tribological characteristics of carbon-fiber-reinforced polyetheretherketone under seawater lubrication

Fabrication of Stent-Like Mesh Structures Using Synchronized Scan Rotation Lithography and Wet Etching

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