Structuring of tungsten by pulsed ECM processes for He-cooled divertor application

Holstein, N.; Krauß, W.; Konys, J.

doi:10.1016/j.fusengdes.2008.05.020

Cited by 14 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…with ratio 1-0.5 for the first time. Below 120 • C no remarkable scale formation is visible in contrast to similar system EMIM-Cl-AlCl 3 [5], despite measurable currents. At 150 • C homogeneous scales were obtained as depicted in Fig.…”

Section: Deposition From Non-aqueous Electrolytesmentioning

confidence: 72%

“…Anodic dissolution methods and pure chemical etching were tested with emphasis to economical and technological aspects. In general anodic dissolution similar to electro-chemical-machining (ECM) [5] is possible, however, more cost intensive than current less chemical etching.…”

Section: Surface Activation Of Tungstenmentioning

confidence: 99%

“…Ionic liquids, molten salts of organics, offer the chance to act as such solvents for transition metal salts 0 500 (e.g. AlCl 3 [5]) and allow formation of electrolytes. Systematically based analyses were started in this field with refractory metals and the IL EMIM-Cl.…”

Section: Deposition From Non-aqueous Electrolytesmentioning

confidence: 99%

See 2 more Smart Citations

Alternative electro-chemically based processing routes for joining of plasma facing components

Krauß

Lorenz

Holstein

et al. 2011

Fusion Engineering and Design

View full text Add to dashboard Cite

Section: Deposition From Non-aqueous Electrolytesmentioning

confidence: 72%

Section: Surface Activation Of Tungstenmentioning

confidence: 99%

See 1 more Smart Citation

Alternative electro-chemically based processing routes for joining of plasma facing components

Krauß

Lorenz

Holstein

et al. 2011

Fusion Engineering and Design

View full text Add to dashboard Cite

“…The challenge is a synchronization of all these parameters with the "normal" parameters as current density and chemical environment. Details are described in [8].…”

Section: C-ecm For Deep Structuringmentioning

confidence: 99%

Development of novel tungsten processing technologies for electro-chemical machining (ECM) of plasma facing components

Holstein

Krauß

Konys

2011

Fusion Engineering and Design

View full text Add to dashboard Cite

“…11 Drastically different from easy-to-handle metals, WO 3 is generated on the processed surface in ECM of pure tungsten with neutral aqueous solutions, which blocks further dissolution of tungsten. 5,11 But WO 3 can be removed from tungsten surface in alkaline solutions, [12][13][14][15] in which hydroxyl ions (OHˉ) play the leading role. Hence, alkaline solution is the well-deserved choice to process tungsten in ECM.…”

mentioning

confidence: 99%

A Distinct Perception on Wire Electrochemical Micromachining of Pure Tungsten with Neutral Aqueous Solution

Gao

2019

J. Electrochem. Soc.

View full text Add to dashboard Cite

Pure tungsten is widely-used in industrial and electrochemical machining (ECM) is favored to machine tungsten. Alkaline solution is preferred in ECM of tungsten. However, alkaline solution isn't environment-friendly, creating the need of greener electrolytes. Neutral solution can dissolve tungsten theoretically since OHˉcan be generated in ECM, which plays the same role as alkaline solution. With neutral solution, bipolar current was used to produce numerous OHˉfor the ECM of tungsten. However, tool cathode wears out when bipolar current is used, indicating its unfeasibility in wire electrochemical micromachining (WEMM, a variation of ECM). An alternative conception is needed for WEMM of tungsten. Actually, the amount of removed material is very tiny in unit time in WEMM. It' possible that OHˉgenerated is adequate in WEMM of tungsten with neutral solution, which's worth investigating. Herein, with neutral solution only, WEMM of tungsten is investigated. Electrochemical characteristic of tungsten in different neutral solutions is measured. Experiments are conducted on a series of tungsten foils with such solutions. The experimental results demonstrated that with neutral solution only, a range of tungsten foils (0 to 200 μm) can be well machined by WEMM. Finally, microstructures with excellent morphology are achieved using 0.1 m/l NaNO 3 solution.

show abstract

Structuring of tungsten by pulsed ECM processes for He-cooled divertor application

Cited by 14 publications

References 7 publications

Alternative electro-chemically based processing routes for joining of plasma facing components

Alternative electro-chemically based processing routes for joining of plasma facing components

Development of novel tungsten processing technologies for electro-chemical machining (ECM) of plasma facing components

A Distinct Perception on Wire Electrochemical Micromachining of Pure Tungsten with Neutral Aqueous Solution

Contact Info

Product

Resources

About