Controllable hydrophilic titanium surface with micro-protrusion or micro-groove processed by femtosecond laser direct writing

He, Weidong; Yao, Peng; Chu, Dongkai; Sun, Hui; Lai, Qingguo; Wang, Qingwei; Wang, Pengfei; Qu, Shuoshuo; Huang, Chuanzhen

doi:10.1016/j.optlastec.2022.108082

Cited by 16 publications

(11 citation statements)

References 36 publications

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“…In addition, blue or dark blue areas were visible on each material, resulting from local surface overheating and oxidation. The appearance of an oxide film on the titanium treated at a sufficient fluence is usual and often reported [9,14,23]. Such behavior can be explained by the oxygen adsorption by metal(s) melted by laser irradiation and eventually the formation of oxides [2].…”

Section: Surface Topography and Compositionmentioning

confidence: 97%

“…The chemical composition was slightly related to the laser action. After laser processing, the oxygen content was higher in the micro-protrusion than in the micro-groove [9]. Excessive oxygen was appointed within the subsurface layer [16,22].…”

Section: Introductionmentioning

confidence: 96%

“…The laser action unequivocally influences the surface topography. Surface structures can be modeled from micro-grooves to micro-protrusions by setting up the selected pro-cessing parameters [9], simultaneously increasing the roughness. Using femtosecond laser line scanning, textured surfaces are created with some microcracks [10].…”

Section: Introductionmentioning

confidence: 99%

“…Laser treatment can also affect wettability. A hydrophilic titanium surface was obtained using a femtosecond laser [9]. The hydrophilic surface was observed after modification with a femtosecond laser, with the water contact angle decreasing with the increasing laser fluence [10].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Laser Treatment on Intrinsic Mechanical Stresses in Titanium and Some of Its Alloys

et al. 2023

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Laser surface treatment conducted at different power levels is an option to modify titanium bone implants to produce nano- and microtopography. However, such processing can lead to excess mechanical stress within the surface layer. This research aims to calculate the level of such residual stresses after the surface processing of Ti grade IV, Ti15Mo, and Ti6Al7Nb alloys with an Nd:YAG laser. Light and scanning electron microscopies (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffractometry (XRD), optical profilography, and nano-indentation tests were applied to characterize the surface zone. The laser processing resulted in a distinct surface pattern and the formation of remelted zones 66–126 µm thick, with roughness values ranging between 0.22 and 1.68 µm. The mechanical properties were weakly dependent on the material composition. The residual stresses caused by the laser treatment were moderate, always tensile, increasing with loading, and was the highest for the Ti15Mo alloy.

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Section: Surface Topography and Compositionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Laser Treatment on Intrinsic Mechanical Stresses in Titanium and Some of Its Alloys

et al. 2023

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“…Abhijith et al (2021) fabricated micro-grooves with embedded nanoscale ripples on Ti surfaces via laser surface texturing (LST) and verified the enhancement of surface hydrophilicity and osseointegration. He et al (2022) proposed a method that controls the hydrophilicity of Ti surfaces with either micro-protrusions or microgrooves. The effect of the femtosecond laser process parameters on the shape of the microstructure was investigated.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Microstructures and Roughness Design Effects on Surface Hydrophilicity through the Lattice Boltzmann Method

2023

JAFM

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Hydrophilicity is one of the most vital characteristics of titanium (Ti) implants. Surface structure design is a powerful and efficient strategy for improving the intrinsic hydrophilic ability of Ti implants. Existing research has focused on experimental exploration, and hence, a reliable numerical model is needed for surface structure design and corresponding hydrophilicity prediction. To address this challenge, we proposed a numerical model to analyze the droplet dynamics on Ti surfaces with specific microstructures designed through the lattice Boltzmann method (LBM). In this work, a Shan-Chen (SC) model was applied in the simulations. We simulated droplets spreading on smooth and micropillar surfaces with various wettability and provided a comprehensive discussion of the edge locations, contact line, droplet height, contact area, surface free energy, and forces to reveal more details and mechanisms. To better tune and control the surface hydrophilicity, we investigated the effects of micropillar geometric sizes (pillar width a, height h, and pitch b) on hydrophilicity via single factor analysis and the response surface method (RSM). The results show that the hydrophilicity initially increases and then decreases with an increasing a, increases with an increasing h, and decreases with an increasing d. In addition, the interaction effects of a-d and h-d are significant. The optimization validation of the RSM also demonstrates the accuracy of our lattice Boltzmann (LB) model with an error of 0.687%. Here, we defined a dimensionless parameter ξ to integrate the geometric parameters and denote the surface roughness. The hydrophilicity of Ti surfaces improves with an increasing surface roughness. In addition, the effect of the microstructure geometry shape was investigated under the same value of surface roughness. Surfaces with micropillars show the best hydrophilicity. Moreover, this study is expected to provide an accurate and reliable LB model for predicting and enhancing the intrinsic hydrophilicity of Ti surfaces via specific microstructure and roughness designs.

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A Hybrid Incremental Sheet Forming Process for Fabricating Functional Surface Microtextures

Zhao,

Li,

Liu

et al. 2023

Lecture Notes in Mechanical Engineering

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Controllable hydrophilic titanium surface with micro-protrusion or micro-groove processed by femtosecond laser direct writing

Cited by 16 publications

References 36 publications

Effect of Laser Treatment on Intrinsic Mechanical Stresses in Titanium and Some of Its Alloys

Effect of Laser Treatment on Intrinsic Mechanical Stresses in Titanium and Some of Its Alloys

Numerical Study of Microstructures and Roughness Design Effects on Surface Hydrophilicity through the Lattice Boltzmann Method

A Hybrid Incremental Sheet Forming Process for Fabricating Functional Surface Microtextures

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