Heat pretreatment-induced activation of gadolinium surfaces towards the initial precipitation of hydrides

G. Benamar; D. Schweke; N. Shamir; S. Zalkind; T. Livneh; A. Danon; G. Kimmel; M. H. Mintz

doi:10.1016/j.jallcom.2010.03.080

Heat pretreatment-induced activation of gadolinium surfaces towards the initial precipitation of hydrides

G. Benamar, D. Schweke, N. Shamir, S. Zalkind, T. Livneh, A. Danon, G. Kimmel, M. H. Mintz

Unit of Nuclear Engineering

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

15 Scopus citations

Abstract

A vacuum heat pretreatment is applied, in order to enhance the reactivity of hydride-forming metals towards hydrogen reaction. For gadolinium, as for other rare-earth metals and some actinides, pretreatment temperatures of about 470 K are sufficient to induce such activation. The different factors that may be involved in that activation mechanism are identified and analyzed for gadolinium and their role is evaluated. It is concluded that the most prominent effect is desorption of surface hydroxyl groups, which impede the dissociative chemisorptions of hydrogen.

Original language	English
Pages (from-to)	26-29
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	498
Issue number	1
DOIs	https://doi.org/10.1016/j.jallcom.2010.03.080
State	Published - 21 May 2010

Keywords

Activation
Desorption
Gadolinium
Hydride

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2010.03.080

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title = "Heat pretreatment-induced activation of gadolinium surfaces towards the initial precipitation of hydrides",

abstract = "A vacuum heat pretreatment is applied, in order to enhance the reactivity of hydride-forming metals towards hydrogen reaction. For gadolinium, as for other rare-earth metals and some actinides, pretreatment temperatures of about 470 K are sufficient to induce such activation. The different factors that may be involved in that activation mechanism are identified and analyzed for gadolinium and their role is evaluated. It is concluded that the most prominent effect is desorption of surface hydroxyl groups, which impede the dissociative chemisorptions of hydrogen.",

keywords = "Activation, Desorption, Gadolinium, Hydride",

author = "G. Benamar and D. Schweke and N. Shamir and S. Zalkind and T. Livneh and A. Danon and G. Kimmel and Mintz, {M. H.}",

note = "Funding Information: This work was partially supported by a grant from the Israel Council for Higher Education and Israel Atomic Energy Commission and a grant from the Ministry of National Infrastructure Division of R&D . ",

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doi = "10.1016/j.jallcom.2010.03.080",

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T1 - Heat pretreatment-induced activation of gadolinium surfaces towards the initial precipitation of hydrides

AU - Benamar, G.

AU - Schweke, D.

AU - Shamir, N.

AU - Zalkind, S.

AU - Livneh, T.

AU - Danon, A.

AU - Kimmel, G.

AU - Mintz, M. H.

N1 - Funding Information: This work was partially supported by a grant from the Israel Council for Higher Education and Israel Atomic Energy Commission and a grant from the Ministry of National Infrastructure Division of R&D .

PY - 2010/5/21

Y1 - 2010/5/21

N2 - A vacuum heat pretreatment is applied, in order to enhance the reactivity of hydride-forming metals towards hydrogen reaction. For gadolinium, as for other rare-earth metals and some actinides, pretreatment temperatures of about 470 K are sufficient to induce such activation. The different factors that may be involved in that activation mechanism are identified and analyzed for gadolinium and their role is evaluated. It is concluded that the most prominent effect is desorption of surface hydroxyl groups, which impede the dissociative chemisorptions of hydrogen.

AB - A vacuum heat pretreatment is applied, in order to enhance the reactivity of hydride-forming metals towards hydrogen reaction. For gadolinium, as for other rare-earth metals and some actinides, pretreatment temperatures of about 470 K are sufficient to induce such activation. The different factors that may be involved in that activation mechanism are identified and analyzed for gadolinium and their role is evaluated. It is concluded that the most prominent effect is desorption of surface hydroxyl groups, which impede the dissociative chemisorptions of hydrogen.

KW - Activation

KW - Desorption

KW - Gadolinium

KW - Hydride

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U2 - 10.1016/j.jallcom.2010.03.080

DO - 10.1016/j.jallcom.2010.03.080

M3 - Article

AN - SCOPUS:77952101826

SN - 0925-8388

VL - 498

SP - 26

EP - 29

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1

ER -

Heat pretreatment-induced activation of gadolinium surfaces towards the initial precipitation of hydrides

Abstract

Keywords

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