The Role of Spraying Parameters and Inert Gas Shrouding in Hybrid Water-Argon Plasma Spraying of Tungsten and Copper for Nuclear Fusion Applications

Matějíček, Jiří; Kavka, T.; Bertolissi, G.; Ctibor, Pavel; Vilémová, Monika; Mušálek, Radek; Nevrlá, Barbara

doi:10.1007/s11666-013-9895-x

Cited by 28 publications

(11 citation statements)

References 26 publications

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“…Highly dense and conductive coatings of refractive materials such as tungsten can be applied on plasma-facing components (Ref [341][342][343] that are exposed to plasma having temperatures of millions of degrees. Their objective is to protect construction materials from particle irradiation and heat flux from the plasma.…”

Section: Windmentioning

confidence: 99%

The 2016 Thermal Spray Roadmap

et al. 2016

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Considerable progress has been made over the last decades in thermal spray technologies, practices and applications. However, like other technologies, they have to continuously evolve to meet new problems and market requirements. This article aims to identify the current challenges limiting the evolution of these technologies and to propose research directions and priorities to meet these challenges. It was prepared on the basis of a collection of short articles written by experts in thermal spray who were asked to present a snapshot of the current state of their specific field, give their views on current challenges faced by the field and provide some guidance as to the R&D required to meet these challenges. The article is divided in three sections that deal with the emerging thermal spray processes, coating properties and function, and biomedical, electronic, aerospace and energy generation applications.

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Section: Windmentioning

confidence: 99%

The 2016 Thermal Spray Roadmap

et al. 2016

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“…The material loss could have occurred by evaporation during flight and/or by splashing upon impact, if the splashed droplets did not adhere. Droplet fragmentation in-flight is unlikely under these conditions, as shown in [35]. Occasionally, bubbles were observed near the center of some splats, indicating that adsorbates were not completely removed by the preheat run.…”

Section: Observations Of Single Splatsmentioning

confidence: 89%

The Influence of Interface Characteristics on the Adhesion/Cohesion of Plasma Sprayed Tungsten Coatings

et al. 2013

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Abstract:Tungsten is the prime candidate material for plasma facing components of future fusion devices. Plasma spraying, with its ability to coat large areas, including non-planar surfaces, with a significant thickness, is a prospective fabrication technology for components subject to moderate heat loads, e.g., the first wall of the Demonstration Reactor (DEMO). The functionality of such coatings is critically dependent on their adhesion to the underlying material. This in turn, is influenced by a variety of processing-related factors, chief among them being the state of the interface. In this study, the effects of two factors-surface roughness and the presence of thin interlayers-were investigated. Two different levels of roughness of steel substrates were induced by grit blasting, and two thin interlayers-titanium (Ti) and tungsten (W)-were applied by physical vapor deposition prior to plasma spraying of W by a Water Stabilized Plasma (WSP) torch. Coating adhesion was determined by a shear adhesion test. The structures of the coatings and the interfaces, as well as the characteristics of the fractured surfaces, were observed by SEM.

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“…Argon shrouding was applied to suppress coating oxidation [13]. For the irradiation experiments a 1 cm × 1 cm specimen was cut out of the sprayed piece.…”

Section: Methodsmentioning

confidence: 99%

Heat load and deuterium plasma effects on SPS and WSP tungsten

et al. 2015

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Abstract. Tungsten is a prime choice for armor material in future nuclear fusion devices. For the realization of fusion, it is necessary to address issues related to the plasma-armor interactions. In this work, several types of tungsten material were studied, i.e. tungsten prepared by spark plasma sintering (SPS) and by water stabilized plasma spraying (WSP) technique. An intended surface porosity was created in the samples to model hydrogen/ helium bubbles. The samples were subjected to a laser heat loading and a radiation loading of deuterium plasma to simulate edge plasma conditions of a nuclear fusion device (power density of 10 8 W/cm 2 and 10 7 W/cm 2 , respectively, in the pulse intervals up to 200 ns). Thermally induced changes in the morphology and the damage to the studied surfaces are described. Possible consequences for the fusion device operation are pointed out.

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The Role of Spraying Parameters and Inert Gas Shrouding in Hybrid Water-Argon Plasma Spraying of Tungsten and Copper for Nuclear Fusion Applications

Cited by 28 publications

References 26 publications

The 2016 Thermal Spray Roadmap

The 2016 Thermal Spray Roadmap

The Influence of Interface Characteristics on the Adhesion/Cohesion of Plasma Sprayed Tungsten Coatings

Heat load and deuterium plasma effects on SPS and WSP tungsten

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