Influence of tungsten-carbon mixed layer and irradiation defects on deuterium retention behavior in tungsten

Ryo Miura; Tetsuo Fujishima; Hiromichi Uchimura; Kensuke Toda; Makoto Kobayashi; Naoko Ashikawa; Akio Sagara; Naoaki Yoshida; Yuji Hatano; Yasuhisa Oya; Kenji Okuno

doi:10.1016/j.fusengdes.2013.04.051

Influence of tungsten-carbon mixed layer and irradiation defects on deuterium retention behavior in tungsten

Ryo Miura^*, Tetsuo Fujishima, Hiromichi Uchimura, Kensuke Toda, Makoto Kobayashi, Naoko Ashikawa, Akio Sagara, Naoaki Yoshida, Yuji Hatano, Yasuhisa Oya, Kenji Okuno

^*Corresponding author for this work

Hydrogen Isotope Research Center, Organization for Promotion of Research

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

6 Scopus citations

Abstract

The D₂⁺ fluence dependence on deuterium (D) retention was studied to clarify the D retention mechanism in tungsten. The additional D desorption stage was observed around 660 K in the TDS spectrum for a sample implanted with D₂⁺ up to the fluence of 10²³ D⁺ m^-2, which desorption stage was not observed the D ₂⁺ implanted sample with the fluence less than 10 ²² D⁺ m^-2. The TEM observation showed that the highly dense voids were formed in tungsten by D₂⁺ implantation with the fluence of 10²³ D⁺ m^-2, considering that the D would be trapped by voids. To understand the D trapping by voids in C⁺ implanted tungsten, C⁺-D₂ ⁺ sequential implantation experiments at various C⁺ implantation temperatures were performed. It was found that the amount of D desorbed around 560 K was increased by increasing the C⁺ implantation temperature. The formation of the voids was observed with increasing the C ⁺ implantation temperature by TEM, indicating that the increase of D desorption around 560 K was caused by the formation of voids. However, the desorption temperature of D trapped by voids in C⁺ implanted sample was lower than that in D₂⁺ implanted one. TEM observation and XPS measurement indicated that this difference was caused by the increase of void size and/or the presence of implanted carbon.

Original language	English
Pages (from-to)	1827-1830
Number of pages	4
Journal	Fusion Engineering and Design
Volume	88
Issue number	9-10
DOIs	https://doi.org/10.1016/j.fusengdes.2013.04.051
State	Published - 2013/10

Keywords

Carbon
Deuterium retention behavior
TDS
TEM
Tungsten
Voids

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
General Materials Science
Mechanical Engineering

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10.1016/j.fusengdes.2013.04.051

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@article{1d8517ef1cd44e5a9c85151cfbe806c2,

title = "Influence of tungsten-carbon mixed layer and irradiation defects on deuterium retention behavior in tungsten",

abstract = "The D2+ fluence dependence on deuterium (D) retention was studied to clarify the D retention mechanism in tungsten. The additional D desorption stage was observed around 660 K in the TDS spectrum for a sample implanted with D2+ up to the fluence of 1023 D+ m-2, which desorption stage was not observed the D 2+ implanted sample with the fluence less than 10 22 D+ m-2. The TEM observation showed that the highly dense voids were formed in tungsten by D2+ implantation with the fluence of 1023 D+ m-2, considering that the D would be trapped by voids. To understand the D trapping by voids in C+ implanted tungsten, C+-D2 + sequential implantation experiments at various C+ implantation temperatures were performed. It was found that the amount of D desorbed around 560 K was increased by increasing the C+ implantation temperature. The formation of the voids was observed with increasing the C + implantation temperature by TEM, indicating that the increase of D desorption around 560 K was caused by the formation of voids. However, the desorption temperature of D trapped by voids in C+ implanted sample was lower than that in D2+ implanted one. TEM observation and XPS measurement indicated that this difference was caused by the increase of void size and/or the presence of implanted carbon.",

keywords = "Carbon, Deuterium retention behavior, TDS, TEM, Tungsten, Voids",

author = "Ryo Miura and Tetsuo Fujishima and Hiromichi Uchimura and Kensuke Toda and Makoto Kobayashi and Naoko Ashikawa and Akio Sagara and Naoaki Yoshida and Yuji Hatano and Yasuhisa Oya and Kenji Okuno",

note = "Funding Information: This study has been supported by NIFS Collaboration Program No. NIFS07KOBA020 , JSPS Kakenhi Nos. 19686055 and 22360389 from MEXT , Japan, and the Center for Instrumental Analysis at Shizuoka University .",

year = "2013",

month = oct,

doi = "10.1016/j.fusengdes.2013.04.051",

language = "英語",

volume = "88",

pages = "1827--1830",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier B.V.",

number = "9-10",

}

TY - JOUR

T1 - Influence of tungsten-carbon mixed layer and irradiation defects on deuterium retention behavior in tungsten

AU - Miura, Ryo

AU - Fujishima, Tetsuo

AU - Uchimura, Hiromichi

AU - Toda, Kensuke

AU - Kobayashi, Makoto

AU - Ashikawa, Naoko

AU - Sagara, Akio

AU - Yoshida, Naoaki

AU - Hatano, Yuji

AU - Oya, Yasuhisa

AU - Okuno, Kenji

N1 - Funding Information: This study has been supported by NIFS Collaboration Program No. NIFS07KOBA020 , JSPS Kakenhi Nos. 19686055 and 22360389 from MEXT , Japan, and the Center for Instrumental Analysis at Shizuoka University .

PY - 2013/10

Y1 - 2013/10

N2 - The D2+ fluence dependence on deuterium (D) retention was studied to clarify the D retention mechanism in tungsten. The additional D desorption stage was observed around 660 K in the TDS spectrum for a sample implanted with D2+ up to the fluence of 1023 D+ m-2, which desorption stage was not observed the D 2+ implanted sample with the fluence less than 10 22 D+ m-2. The TEM observation showed that the highly dense voids were formed in tungsten by D2+ implantation with the fluence of 1023 D+ m-2, considering that the D would be trapped by voids. To understand the D trapping by voids in C+ implanted tungsten, C+-D2 + sequential implantation experiments at various C+ implantation temperatures were performed. It was found that the amount of D desorbed around 560 K was increased by increasing the C+ implantation temperature. The formation of the voids was observed with increasing the C + implantation temperature by TEM, indicating that the increase of D desorption around 560 K was caused by the formation of voids. However, the desorption temperature of D trapped by voids in C+ implanted sample was lower than that in D2+ implanted one. TEM observation and XPS measurement indicated that this difference was caused by the increase of void size and/or the presence of implanted carbon.

AB - The D2+ fluence dependence on deuterium (D) retention was studied to clarify the D retention mechanism in tungsten. The additional D desorption stage was observed around 660 K in the TDS spectrum for a sample implanted with D2+ up to the fluence of 1023 D+ m-2, which desorption stage was not observed the D 2+ implanted sample with the fluence less than 10 22 D+ m-2. The TEM observation showed that the highly dense voids were formed in tungsten by D2+ implantation with the fluence of 1023 D+ m-2, considering that the D would be trapped by voids. To understand the D trapping by voids in C+ implanted tungsten, C+-D2 + sequential implantation experiments at various C+ implantation temperatures were performed. It was found that the amount of D desorbed around 560 K was increased by increasing the C+ implantation temperature. The formation of the voids was observed with increasing the C + implantation temperature by TEM, indicating that the increase of D desorption around 560 K was caused by the formation of voids. However, the desorption temperature of D trapped by voids in C+ implanted sample was lower than that in D2+ implanted one. TEM observation and XPS measurement indicated that this difference was caused by the increase of void size and/or the presence of implanted carbon.

KW - Carbon

KW - Deuterium retention behavior

KW - TDS

KW - TEM

KW - Tungsten

KW - Voids

UR - http://www.scopus.com/inward/record.url?scp=84884986675&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2013.04.051

DO - 10.1016/j.fusengdes.2013.04.051

M3 - 学術論文

AN - SCOPUS:84884986675

SN - 0920-3796

VL - 88

SP - 1827

EP - 1830

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

IS - 9-10

ER -

Influence of tungsten-carbon mixed layer and irradiation defects on deuterium retention behavior in tungsten

Abstract

Keywords

ASJC Scopus subject areas

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