Bulk hydrogen retention in neutron-irradiated graphite at elevated temperatures

被引：13

作者：

Atsumi, H. ^{[1
]}

Tanabe, T. ^{[2
]}

Shikama, T. ^{[3
]}

机构：

[1] Kinki Univ, Dept Elect & Elect Engn, Higashiosaka, Osaka, Japan

[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Fukuoka 812, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 980, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷

关键词：

CARBON MATERIALS; COMPONENTS; ABSORPTION; TRANSPORT; TRITIUM;

D O I：

10.1016/j.jnucmat.2009.01.112

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bulk hydrogen retention and the analysis of absorption kinetics have been studied on graphite samples irradiated with neutrons at various fluences. There are two kinds of hydrogen trapping sites: interstitial cluster loop edge sites (trap 1) and carbon dangling bonds at edge surfaces of a crystallite (trap 2). Neutron irradiation preferably creates trap 2 sites at lower fluences and trap I sites at higher fluences. The dissociation enthalpy becomes 2-3 times higher for neutron-irradiated samples due to the creation of high energy trapping sites. Absorption kinetics, such as diffusion coefficients and absorption rate constants are strongly affected by neutron irradiation and annealing after irradiation. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：581 / 584

页数：4

共 16 条

[1] Hydrogen absorption into neutron-irradiated graphite and estimation of the trapping effect [J].

Atsumi, H. ;

Shibata, N. ;

Tanabe, T. ;

Shikama, T. .

PHYSICA SCRIPTA, 2007, T128 :72-75

[2] Hydrogen absorption and transport in graphite materials [J].

Atsumi, H ;

Tauchi, K .

JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 356 :705-709

[3] Hydrogen retention in graphite and carbon materials under a fusion reactor environment [J].

Atsumi, H .

JOURNAL OF NUCLEAR MATERIALS, 2003, 313 :543-547

[4] Mechanism of hydrogen trapping and transport in carbon materials [J].

Atsumi, H .

PHYSICA SCRIPTA, 2003, T103 :77-80

[5] Hydrogen bulk retention in graphite and kinetics of diffusion [J].

Atsumi, H .

JOURNAL OF NUCLEAR MATERIALS, 2002, 307 :1466-1470

[6] Hydrogen behavior in carbon-based materials and its neutron irradiation effect [J].

Atsumi, H ;

Iseki, M ;

Shikama, T .

JOURNAL OF NUCLEAR MATERIALS, 1996, 233 :1128-1132

[7]

ATSUMI H, 1992, J NUCL MATER, V191, P368

[8]

ATSUMI H, J NUCL MAT IN PRESS

[9] Hydrogen isotope retention and recycling in fusion reactor plasma-facing components [J].

Causey, RA .

JOURNAL OF NUCLEAR MATERIALS, 2002, 300 (2-3) :91-117

[10] THE INTERACTION OF TRITIUM WITH GRAPHITE AND ITS IMPACT ON TOKAMAK OPERATIONS [J].

CAUSEY, RA .

JOURNAL OF NUCLEAR MATERIALS, 1989, 162 :151-161

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