Overview of processing technologies for tungsten-steel composites and FGMs for fusion applications

• Authors: Jiří Matějíček , Barbara Nevrlá , Monika Vilémová , Hanna Boldyryeva
• Languages of publication: EN

Abstracts

EN

Tungsten is a prime candidate material for the plasma-facing components in future fusion devices, e.g. ITER and DEMO. Because of the harsh and complex loading conditions and the differences in material properties, joining of the tungsten armor to the underlying construction and/or cooling parts is a complicated issue. To alleviate the thermal stresses at the joint, a sharp interface may be replaced by a gradual one with a smoothly varying composition. In this paper, several techniques for the formation of tungsten-steel composites and graded layers are reviewed. These include plasma spraying, laser cladding, hot pressing and spark plasma sintering. Structure, composition and selected thermal and mechanical properties of representative layers produced by each of these techniques are presented. A summary of advantages and disadvantages of the techniques and an assessment of their suitability for the production of plasma-facing components is provided.

Keywords

EN

plasma-facing components; functionally graded materials (FGMs); tungsten; steel; plasma spraying; powder metallurgy

• Publisher: De Gruyter Open
• Journal: Nukleonika
• Year: 2015
• Volume: 60
• Issue: 2
• Pages: 267-273

Dates

published

1 - 6 - 2015

accepted

19 - 11 - 2014

online

22 - 6 - 2015

received

9 - 6 - 2014

Contributors

author

Jiří Matějíček

• Institute of Plasma Physics ASCR, Za Slovankou 3, 182 00 Prague 8, Czech Republic, Tel.: [phone], Fax: [phone]

author

Barbara Nevrlá

• Institute of Plasma Physics ASCR, Za Slovankou 3, 182 00 Prague 8, Czech Republic, Tel.: [phone], Fax: [phone]

author

Monika Vilémová

• Institute of Plasma Physics ASCR, Za Slovankou 3, 182 00 Prague 8, Czech Republic, Tel.: [phone], Fax: [phone]

author

Hanna Boldyryeva

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Identifiers

DOI

10.1515/nuka-2015-0049