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

Matějíček, Jiří; Nevrlá, Barbara; Vilémová, Monika; Boldyryeva, H.

doi:10.1515/nuka-2015-0049

Cited by 32 publications

(9 citation statements)

References 20 publications

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“…An FGM interlayer may reduce the stress concentration between these two materials, compared to a sharp interface [2]. Depending on the processing technique, intermetallic compounds such as Fe 2 W and Fe 7 W 6 may form [3]. For design considerations, the properties of all constituents need to be known; these are the subject of this paper.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Properties of Individual Phases Formed in Sintered Tungsten-Steel Composites

et al. 2015

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Tungsten is a prime candidate material for plasma facing components in fusion devices, thanks to its advantageous properties with respect to interaction with hot plasma. For its bonding to the supporting structure, composites and graded layers can be used for the reduction of stress concentration at the interface. When tungsten and steel are processed at elevated temperatures, e.g. hot pressing or spark plasma sintering, intermetallic phases may form and their presence and properties will aect the properties of the composite. In this work, mechanical and thermal properties of the individual phases, i.e. steel, tungsten and FeW intermetallics are investigated. Mechanical properties were determined by instrumented indentation. Thermal conductivity was determined by the xenon ash method on a range of samples with varying composition, from which the conductivities of each constituent were estimated. The results can be used for the optimization of compositional proles and processing conditions for manufacturing of plasma facing components.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Properties of Individual Phases Formed in Sintered Tungsten-Steel Composites

et al. 2015

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“…For appropriate stress redistribution, a thickness of the order of millimeters is needed [6]. An overview of several prospective fabrication technologies, such as plasma spraying, laser cladding, hot pressing, and spark plasma sintering, with their characteristics, advantages, and limitations was provided in [7]. W-rich composites with small percentage of Ni + Fe or Ni + Cu, commonly called "tungsten heavy alloys", are considered as possible plasma-facing materials as an alternative to tungsten.…”

Section: Introductionmentioning

confidence: 99%

W + Cu and W + Ni Composites and FGMs Prepared by Plasma Transferred Arc Cladding

2021

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Tungsten-based materials are the most prospective candidates for plasma-facing components of future fusion devices, such as DEMO. W-based composites and graded layers can serve as stress-relieving interlayers for the joints between plasma-facing armor and the cooling or structural parts. Coating/cladding techniques offer the advantages of eliminating the joining step and the ability to coat large areas, even on nonplanar shapes. In this work, W + Cu and W + Ni composites were prepared by pulsed plasma transferred arc (PTA) cladding on several different substrates. Optimization of the process was carried out with respect to powder mixture composition and process parameters like arc current, plasma gas composition, and traverse velocity. Dense claddings of several millimeters thickness and various W content were achieved. Moreover, multilayers with W content gradually varying from 47 to 92% were formed. The structure, compositional profiles, and thermal properties of the claddings were characterized.

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“…Tungsten is an essential construction material for the thermonuclear experimental reactor (ITER) [3].Tungsten is also used in mechanical engineering, chemical industry, aviation, medicine, and electrochemical processing [4][5].…”

Section: Introductionmentioning

confidence: 99%

Periodic Sorption of Tungstate Ions on Anionite AV-17-8

et al. 2017

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Abstract. The multiple sorption of sodium tungstate resulting from the autoclave-soda digestion of a tungsten-bearing concentrate was studied using anion-exchange resin AV-17-8. The choice of ion exchange resin was carried out under static conditions using highly basic anionites. The sorption and desorption plots for tungstate and carbonate ions were demonstrated under dynamic conditions. The total dynamic capacity of the resin was estimated for each species of the ions in three sorption cycles. The applicability of the AV-17-8 resin as a sorbent in the autoclave-soda process flowsheet was determined.

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

Cited by 32 publications

References 20 publications

Mechanical and Thermal Properties of Individual Phases Formed in Sintered Tungsten-Steel Composites

Mechanical and Thermal Properties of Individual Phases Formed in Sintered Tungsten-Steel Composites

W + Cu and W + Ni Composites and FGMs Prepared by Plasma Transferred Arc Cladding

Periodic Sorption of Tungstate Ions on Anionite AV-17-8

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