Laser Polishing in Medical Engineering

Temmler, André; Graichen, K.; Donath, Johannes

doi:10.1002/latj.201090028

Cited by 24 publications

(7 citation statements)

References 3 publications

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“…Past research on laser induced surface modification indicated that reduction of surface roughness is possible at pulse durations less than 200 ns and laser beam diameters of a few hundreds of micrometers [6,7]. Other studies include laser induced surface finishing of titanium for biomedical devices and implants [8,9] and microroughness reduction of tungsten films in the IC industry [10]. More recently, Perry et al [11][12][13] have demonstrated that pulsed laser micropolishing (PLlP), with pulse durations of 300 ns and 0.65 ls and a melt pool diameter of 60 lm, is a method by which the surface roughness of microfabricated and micromilled parts can be effectively reduced.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pulse Duration on Laser Micro Polishing

Vadali¹,

Ma²,

Duffie³

et al. 2013

Journal of Micro and Nano-Manufacturing

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Pulsed laser micro polishing (PLμP) has been shown to be an effective method of polishing micro metallic parts whose surface roughness can approach the feature size. Laser pulse duration in the PLμP process is an important parameter that significantly affects the achievable surface finish. This paper describes the influence of laser pulse duration on surface roughness reduction during PLμP. For this purpose, near-infrared laser pulses have been used to polish Ti6Al4V at three different pulse durations: 0.65 μs, 1.91 μs, and 3.60 μs. PLμP at longer pulse durations resulted in dominating Marangoni convective flows, yet significantly higher reductions in the average surface roughness were observed compared to the short pulse duration regime without convection.

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Section: Introductionmentioning

confidence: 99%

Effects of Pulse Duration on Laser Micro Polishing

Vadali¹,

Ma²,

Duffie³

et al. 2013

Journal of Micro and Nano-Manufacturing

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“…Using laser radiation, it is possible to enhance the surface quality of many different materials such as metals, plastics, ceramics, glasses, etc. Hence, laser polishing is a highly used technique for industrial applications [ 31 , 32 , 33 ].…”

Section: Methodsmentioning

confidence: 99%

Micromachining of Transparent Biocompatible Polymers Applied in Medicine Using Bursts of Femtosecond Laser Pulses

et al. 2020

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Biocompatible polymers are used for many different purposes (catheters, artificial heart components, dentistry products, etc.). An important field for biocompatible polymers is the production of vision implants known as intraocular lenses or custom-shape contact lenses. Typically, curved surfaces are manufactured by mechanical means such as milling, turning or lathe cutting. The 2.5 D objects/surfaces can also be manufactured by means of laser micromachining; however, due to the nature of light–matter interaction, it is difficult to produce a surface finish with surface roughness values lower than ~1 µm Ra. Therefore, laser micromachining alone can’t produce the final parts with optical-grade quality. Laser machined surfaces may be polished via mechanical methods; however, the process may take up to several days, which makes the production of implants economically challenging. The aim of this study is the investigation of the polishing capabilities of rough (~1 µm Ra) hydrophilic acrylic surfaces using bursts of femtosecond laser pulses. By changing different laser parameters, it was possible to find a regime where the surface roughness can be minimized to 18 nm Ra, while the polishing of the entire part takes a matter of seconds. The produced surface demonstrates a transparent appearance and the process shows great promise towards commercial fabrication of low surface roughness custom-shape optics.

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“…Moreover, heart pumping components such as in hub and hub cap are also nowadays using lasers to smoothen its surface as shown in Fig. 19 [103].…”

Section: Medical Applicationsmentioning

confidence: 99%

Review on mechanism and process of surface polishing using lasers

2019

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Laser polishing is a technology of smoothening the surface of various materials with highly intense laser beams. When these beams impact on the material surface to be polished, the surface starts to be melted due to the high temperature. The melted material is then relocated from the ‘peaks to valleys’ under the multidirectional action of surface tension. By varying the process parameters such as beam intensity, energy density, spot diameter, and feed rate, different rates of surface roughness can be achieved. High precision polishing of surfaces can be done using laser process. Currently, laser polishing has extended its applications from photonics to molds as well as bio-medical sectors. Conventional polishing techniques have many drawbacks such as less capability of polishing freeform surfaces, environmental pollution, long processing time, and health hazards for the operators. Laser polishing on the other hand eliminates all the mentioned drawbacks and comes as a promising technology that can be relied for smoothening of initial topography of the surfaces irrespective of the complexity of the surface. Majority of the researchers performed laser polishing on materials such as steel, titanium, and its alloys because of its low cost and reliability. This article gives a detailed overview of the laser polishing mechanism by explaining various process parameters briefly to get a better understanding about the entire polishing process. The advantages and applications are also explained clearly to have a good knowledge about the importance of laser polishing in the future.

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Laser Polishing in Medical Engineering

Cited by 24 publications

References 3 publications

Effects of Pulse Duration on Laser Micro Polishing

Effects of Pulse Duration on Laser Micro Polishing

Micromachining of Transparent Biocompatible Polymers Applied in Medicine Using Bursts of Femtosecond Laser Pulses

Review on mechanism and process of surface polishing using lasers

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