Journal ArticleDOI
Site related nucleation and growth of hydrides on uranium surfaces
R. Arkush,A. Venkert,Michael Aizenshtein,S. Zalkind,D. Moreno,M. Brill,Moshe H. Mintz,N. Shamir +7 more
TLDR
In this paper, the characteristics of hydride nucleation and growth on certain surfaces of pure uranium and of U-0.1 wt.% Cr samples were studied (under I atm H, at temperatures of 50-75 C) using the hot-stage microscope, microprobe analyzer and atomic force microscope techniques.Citations
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A review of uranium corrosion by hydrogen and the formation of uranium hydride
TL;DR: A review of the literature surrounding the uranium-hydrogen system accrued over a 70-year period, providing a comprehensive assessment of what is known about hydride formation, decomposition and oxidation in the context of uranium storage applications is provided in this article.
Journal ArticleDOI
Microtextural investigation of hydrided α-uranium
TL;DR: In this paper, the influence of texture and heterogeneity in the microstructure on hydride initiation and growth was investigated in as-cast α-uranium, and the results suggest the dominant role of enhanced sub-surface hydrogen diffusion at misoriented regions in controlling hydrides nucleation and growth.
Journal ArticleDOI
A surface science study of the initial stages of hydrogen corrosion on uranium metal and the role played by grain microstructure
TL;DR: In this article, focused ion beam (FIB) milling with high resolution secondary electron imaging was used to examine grain orientation of the metal in the region of the corrosion sites, and the location of hydride sites was predominantly found to be associated with grain boundaries at the metal surface.
Journal ArticleDOI
Hydride nucleation and formation of hydride growth centers on oxidized metallic surfaces—kinetic theory
TL;DR: In this article, a kinetic theory for the formation of hydride patches on the surface of the metal is proposed. But the model assumes that the initiation of the growth process can take place only at certain sites, with a limited number of such sites available on the surfaces.
Journal ArticleDOI
The influence of oxide thickness on the early stages of the massive uranium–hydrogen reaction
TL;DR: The influence of oxygen-grown UO 2+ x films on the early stages of the massive uranium-hydrogen reaction has been studied in a non-visual, constant-volume cell as mentioned in this paper.
References
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Journal ArticleDOI
Evaluation of the kinetics and mechanisms of hybriding reactions
Moshe H. Mintz,Joseph Bloch +1 more
TL;DR: In this paper, a combined kinetic and metallographic study of hydride formation in metallic samples with well defined geometrical shapes is presented, which is based on a combination of the kinetic parameter IKP and the metallogrithm.
Journal ArticleDOI
Kinetics and mechanism of the U-H reaction
Joseph Bloch,Moshe H. Mintz +1 more
TL;DR: In this article, the authors studied the kinetics of the hydrogenation reaction of uranium over a wide range of pressures (10 2 −10 7 Pa) and temperatures (0 −500 °C).
Journal ArticleDOI
The initial kinetics of uranium hydride formation studied by a hot-stage microscope technique
TL;DR: The initial stages of the formation of uranium trihydride on the surface of uranium samples reacted with gaseous hydrogen (about 1.5 atm) were studied utilizing a hot-stage microscope.
Journal ArticleDOI
A microscope study of the initiation of the hydrogen-uranium reaction
L.W. Owen,R.A. Scudamore +1 more
TL;DR: In this paper, it is proposed that attack sites are formed at local deficiencies in the oxide film around inclusions and through film porosity, and that the rate of formation of attack sites of both types on clean uranium was found to be high.
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