Thermophysical properties and microstructure of plasma-sprayed tungsten coating on low activation materials

Takuya Nagasaka; Ryuta Kasada; Akihiko Kimura; Yoshio Ueda; Takeo Muroga

doi:10.13182/FST56-1053

Thermophysical properties and microstructure of plasma-sprayed tungsten coating on low activation materials

Takuya Nagasaka, Ryuta Kasada, Akihiko Kimura, Yoshio Ueda, Takeo Muroga

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

Tungsten (W) coating on various low activation materials, such as ferritic steel (F82H), oxide dispersion strengthened (ODS) steel, and vanadium alloy NIFS-HEAT-2 (NH2) was successfully demonstrated by the vacuum plasma spray (VPS) process. Void and crack-type defects were observed in VPS-W. The mass density of VPS-Wat room temperature (RT) was -90 % of the bulk W (sintered W The thermal diffusivity and thermal conductivity of VPS-Wfrom RT to 800 °C were 30-50 % of the bulk W, while the linear expansion coefficient and specific heat of VPS-W were similar to the bulk W. The thermal conductivity of VPS-W was significantly lower than the bulk W, but was still larger than the NH2 substrate. There was no significant thermal contact resistance at the interface between W coating and NH2 substrate. Thus, the heat transfer properties of NH2 will not be degraded by the W coating with the VPS process.

Original language	English
Pages (from-to)	1053-1057
Number of pages	5
Journal	Fusion Science and Technology
Volume	56
Issue number	2
DOIs	https://doi.org/10.13182/FST56-1053
Publication status	Published - 2009 Aug
Externally published	Yes

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear and High Energy Physics
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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abstract = "Tungsten (W) coating on various low activation materials, such as ferritic steel (F82H), oxide dispersion strengthened (ODS) steel, and vanadium alloy NIFS-HEAT-2 (NH2) was successfully demonstrated by the vacuum plasma spray (VPS) process. Void and crack-type defects were observed in VPS-W. The mass density of VPS-Wat room temperature (RT) was -90 % of the bulk W (sintered W The thermal diffusivity and thermal conductivity of VPS-Wfrom RT to 800 °C were 30-50 % of the bulk W, while the linear expansion coefficient and specific heat of VPS-W were similar to the bulk W. The thermal conductivity of VPS-W was significantly lower than the bulk W, but was still larger than the NH2 substrate. There was no significant thermal contact resistance at the interface between W coating and NH2 substrate. Thus, the heat transfer properties of NH2 will not be degraded by the W coating with the VPS process.",

author = "Takuya Nagasaka and Ryuta Kasada and Akihiko Kimura and Yoshio Ueda and Takeo Muroga",

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AU - Nagasaka, Takuya

AU - Kasada, Ryuta

AU - Kimura, Akihiko

AU - Ueda, Yoshio

AU - Muroga, Takeo

PY - 2009/8

Y1 - 2009/8

N2 - Tungsten (W) coating on various low activation materials, such as ferritic steel (F82H), oxide dispersion strengthened (ODS) steel, and vanadium alloy NIFS-HEAT-2 (NH2) was successfully demonstrated by the vacuum plasma spray (VPS) process. Void and crack-type defects were observed in VPS-W. The mass density of VPS-Wat room temperature (RT) was -90 % of the bulk W (sintered W The thermal diffusivity and thermal conductivity of VPS-Wfrom RT to 800 °C were 30-50 % of the bulk W, while the linear expansion coefficient and specific heat of VPS-W were similar to the bulk W. The thermal conductivity of VPS-W was significantly lower than the bulk W, but was still larger than the NH2 substrate. There was no significant thermal contact resistance at the interface between W coating and NH2 substrate. Thus, the heat transfer properties of NH2 will not be degraded by the W coating with the VPS process.

AB - Tungsten (W) coating on various low activation materials, such as ferritic steel (F82H), oxide dispersion strengthened (ODS) steel, and vanadium alloy NIFS-HEAT-2 (NH2) was successfully demonstrated by the vacuum plasma spray (VPS) process. Void and crack-type defects were observed in VPS-W. The mass density of VPS-Wat room temperature (RT) was -90 % of the bulk W (sintered W The thermal diffusivity and thermal conductivity of VPS-Wfrom RT to 800 °C were 30-50 % of the bulk W, while the linear expansion coefficient and specific heat of VPS-W were similar to the bulk W. The thermal conductivity of VPS-W was significantly lower than the bulk W, but was still larger than the NH2 substrate. There was no significant thermal contact resistance at the interface between W coating and NH2 substrate. Thus, the heat transfer properties of NH2 will not be degraded by the W coating with the VPS process.

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Thermophysical properties and microstructure of plasma-sprayed tungsten coating on low activation materials

Abstract

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