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SEM Characterization of Hydrogenated Nickel

Published online by Cambridge University Press:  02 July 2020

S.S.M. Tavares ,
A. Lafuente ,
S. Miraglia ,
D. Fruchart ,
B. Lambert  and
S. Pairis
S.S.M. Tavares
Affiliation:
CNRS / Laboratoire de Cristallographie - BP 166, 38042, Grenoble Cedex, France
A. Lafuente
Affiliation:
Inst, de Ciencias de los Materiales de Aragon, CSIC-Universidad de Zaragoza, 50009, Spain
S. Miraglia
Affiliation:
CNRS / Laboratoire de Cristallographie - BP 166, 38042, Grenoble Cedex, France
D. Fruchart
Affiliation:
CNRS / Laboratoire de Cristallographie - BP 166, 38042, Grenoble Cedex, France
B. Lambert
Affiliation:
CNRS / Laboratoire de Cristallographie - BP 166, 38042, Grenoble Cedex, France
S. Pairis
Affiliation:
CNRS / Laboratoire de Cristallographie - BP 166, 38042, Grenoble Cedex, France
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Abstract

The insertion of hydrogen in metals promotes severe modifications of physical and mechanical properties. in the case of nickel, hydrogen induces intergranular cracking [1] and decrease of ferromagnetism [2]. Hydrogen occupies the octahedral interstices of the fee structure promoting cell expansion. Large amounts of the fcc (β hydride may be produced by high pressure hydrogenation [3] or electrolytic charging [4]. The H/Ni relation (x) in the P hydride range from 0.6 to 1.0, depending on the method and conditions of hydrogenation. The β hydride is known to be metaestable at room temperature and normal pressure [5].

In this work, a thin foil (0.02mm thick) of high purity nickel was hydrogenated by electrolytic charging in a 1N H2SO4 solution with 20 mA/cm2 by 24 hours. AS2O3 was used as catalyst in a concentration of 5xl0−5mol/l. The hydrogenated samples were analysed by X-ray diffraction and SEM immediately after and 4 hours after the charging (room temperature aging).

Type
Metals and Alloys
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 1268 - 1269
Copyright
Copyright © Microscopy Society of America 2001

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References

references

1.)Yao, J., Meguid, S. A., Cahoon, J. R., Metall. Trans. A, 24A (1993) 105.CrossRefGoogle Scholar
2.)Jing-Zhi, Yu, Sun, Q., Kawazoe, Y., Mat. Trans. JIM, 4 (1999) 1244.Google Scholar
3.)Hanson, M., Bauer, H.J., J. Alloys and Comp., 179 (1992) 339.CrossRefGoogle Scholar
4.)Traverse, A., Kachnowski, T., Thomé, L., Bernas, H., Phys. Review B, 22 (1980) 4355.CrossRefGoogle Scholar
5.)Wertheim, G. K., Buchanan, D. N. E., J. Phys. Chem. Solids, 28 (1967) 225.CrossRefGoogle Scholar
6.)Zakroczymski, T., Szklarska-Smialowska, Z., Smialowski, M., Corrosion 39 (1983) 20.CrossRefGoogle Scholar