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

25 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

Access to Document

10.13182/FST56-1053

Cite this

@article{49d418084ba34fd6becee49bed3b5b8e,

title = "Thermophysical properties and microstructure of plasma-sprayed tungsten coating on low activation materials",

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",

year = "2009",

month = aug,

doi = "10.13182/FST56-1053",

language = "English",

volume = "56",

pages = "1053--1057",

journal = "Fusion Science and Technology",

issn = "1536-1055",

publisher = "American Nuclear Society",

number = "2",

}

TY - JOUR

T1 - Thermophysical properties and microstructure of plasma-sprayed tungsten coating on low activation materials

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.

UR - http://www.scopus.com/inward/record.url?scp=69649091602&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69649091602&partnerID=8YFLogxK

U2 - 10.13182/FST56-1053

DO - 10.13182/FST56-1053

M3 - Article

AN - SCOPUS:69649091602

VL - 56

SP - 1053

EP - 1057

JO - Fusion Science and Technology

JF - Fusion Science and Technology

SN - 1536-1055

IS - 2

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this