Plasma electrolytic polishing of metalized carbon fibers

Böttger‐Hiller, Falko; Nestler, Klaus; Zeidler, Henning; Glowa, Gunther; Lampke, Thomas

doi:10.3934/matersci.2016.1.260

Cited by 18 publications

(8 citation statements)

References 8 publications

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“…The used carbon fibers were HTS40 (TohoTenax, Chiyoda, Japan), HTS40 with a nickel coating (TohoTenax, Chiyoda, Japan) and Grafil 34700 with a copper coating (Inca-Fiber, Chemnitz, Germany). The production of the copper-coated fiber is described in detail in the publications of Böttger-Hiller [23,24]. The mechanical properties can be found in Table 1.…”

Section: Production and Characterization Methodsmentioning

confidence: 99%

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Bard¹,

Schönl²,

Demleitner³

et al. 2019

Polymers

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In this paper, the thermal and electrical conductivity and mechanical properties of fiber reinforced composites produced from nickel- and copper-coated carbon fibers compared to uncoated fibers are presented. The carbon fibers were processed by our prepreg line and cured to laminates. In the fiber direction, the thermal conductivity doubled from ~3 W/mK for the uncoated fiber, to ~6 W/mK for the nickel, and increased six times to ~20 W/mK for the copper-coated fiber for a fiber volume content of ~50 vol %. Transverse to the fiber, the thermal conductivity increased from 0.6 W/mK (uncoated fiber) to 0.9 W/mK (nickel) and 2.9 W/mK (copper) at the same fiber content. In addition, the electrical conductivity could be enhanced to up to ~1500 S/m with the use of the nickel-coated fiber. We showed that the flexural strength and modulus were in the range of the uncoated fibers, which offers the possibility to use them for lightning strike protection, for heatsinks in electronics or other structural heat transfer elements.

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Section: Production and Characterization Methodsmentioning

confidence: 99%

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Bard¹,

Schönl²,

Demleitner³

et al. 2019

Polymers

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“…In the case of plasma polishing, ecologically harmless aqueous salt solutions are used as the electrolyte, with significantly higher voltages range of 180 V to 320 V [7]. The anodically polarized workpiece to be processed has a much smaller surface area than the cathodically polarized basin, and thus represents the active electrode.…”

Section: Electrolytic Plasma Polishing (Epp)mentioning

confidence: 99%

“…Therefore, the need for techniques that improve the surface quality of metal workpieces such as copper [1,2], stainless steel [3][4][5], titanium [6] and metalized carbon fibers [7] is becoming increasingly important in many industrial (chemical and food industry) and medical applications [8,9]. A change in the surface quality can be obtained by various machining methods, including polishing, coating and cutting processes.…”

Section: Introductionmentioning

confidence: 99%

Electrolytic Plasma Polishing of Pipe Inner Surfaces

Cornelsen

Deutsch

Seitz

2017

Metals

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Smooth surfaces are becoming increasingly important in many industries, such as medical, chemical or food. In some industrial areas, the mechanical treatment of surfaces (grinding and polishing) does not fulfil desired specifications. Non-abrasive methods (chemical and electrochemical) have the advantage that even complex geometries and free-form shapes can be polished. In the context of this paper, electrochemical surface treatment is considered in more detail. Both electro polishing, which is state of the art, and the novel electrolytic plasma polishing (EPP) process are presented. This paper focusses on the electrolytic plasma polishing because it has many advantages compared to the process of electro polishing. The theoretical operation of the electrolytic plasma polishing is shown. A prototype system for plasma polishing of internal surfaces of pipes was installed and a polishing head was developed. Several parameters are investigated, such as the width of the adjustable polishing head gap and different velocities v or different applied potential differences U, and first results of the average surface roughness Sa as function of the various parameters were evaluated. It can be seen that a stable polishing process can be achieved at the highest potential difference of 320 V and that the average surface roughness Sa reaches a range from 0.065 to 0.090 µm. At the same time, it has been shown that with increasing potential difference, the average surface roughness becomes independent of the width of the adjustable polishing head gap.

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“…According to the existing literature, common value of average current density range from 0.1 A/cm 2 to 0.5 A/cm 2 [1,2,3,5,7,16,34,40]. Thus, knowing the initial sample area and monitoring the current during processing, the process can be controlled.…”

Section: Inline Metrology In Plasma Electrolytic Polishingmentioning

confidence: 99%

Process Understanding of Plasma Electrolytic Polishing through Multiphysics Simulation and Inline Metrology

et al. 2019

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Currently, the demand for surface treatment methods like plasma electrolytic polishing (PeP)—a special case of electrochemical machining—is increasing. This paper provides a literature review on the fundamental mechanisms of the plasma electrolytic polishing process and discusses simulated and experimental results. The simulation shows and describes a modelling approach of the polishing effect during the PeP process. Based on the simulation results, it can be assumed that PeP can be simulated as an electrochemical machining process and that the simulation can be used for roughness and processing time predictions. The simulation results exhibit correlations with the experimentally-achieved approximation for roughness decrease. The experimental part demonstrates the results of the PeP processing for different times. The results for different types of roughness show that roughness decreases exponentially. Additionally, a current efficiency calculation was made. Based on the experimental results, it can be assumed that PeP is a special electrochemical machining process with low passivation.

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Plasma electrolytic polishing of metalized carbon fibers

Cited by 18 publications

References 8 publications

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Electrolytic Plasma Polishing of Pipe Inner Surfaces

Process Understanding of Plasma Electrolytic Polishing through Multiphysics Simulation and Inline Metrology

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