Investigations of adsorption states of protium and deuterium in redeposited carbon flakes formed in tokamak T-10

被引：13

作者：

Svechnikov, N. Yu. ^{[1
]}

Stankevich, V. G. ^{[1
]}

Sukhanov, L. P. ^{[1
]}

Menshikov, K. A. ^{[1
]}

Lebedev, A. M. ^{[1
]}

Kolbasov, B. N. ^{[1
]}

Zubavichus, Y. V. ^{[1
]}

Rajarathnam, D. ^{[2
]}

机构：

[1] Russian Res Ctr Kurchatov Inst, Moscow 123182, Russia

[2] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore

来源：

JOURNAL OF NUCLEAR MATERIALS | 2008年 / 376卷 / 02期

关键词：

D O I：

10.1016/j.jnucmat.2008.02.072

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work reports thermal desorption spectroscopy (TDS), Fourier-transform infrared (FF-IR) spectroscopy and X-ray diffraction (XRD) analyses on free standing redeposited hydrocarbon films (flakes) with a high deuterium to hydrogen isotopic ratio, produced in the T-10 tokamak in the Kurchatov Institute. XRD pattern showed that the carbon flakes differ substantially from graphite and are non-crystalline. The TDS D-2(H-2) curves consist of two groups of peaks (450-800 K and 900-1000 K), and appeared to be rather similar to those obtained for a mechanically milled nanostructured graphite. As a result, two main adsorption states with activation energies of about 0.65 and 1.25 eV/H were found, implying a hopping diffusion and a resonance mechanism, respectively. The IR spectral differences between reddish-gold and dark-brown flakes showed a less degree of C-H hybridization for dark films and a disordered carbon network, to which the CD2,3 end-groups are connected. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：152 / 159

页数：8

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