The morphology and anisotropic growth kinetics of cerium hydride reaction sites

Effect of alloyed Ti on the microstructure and corrosion characteristics of a U–Ti alloy in a hydrogen environment

“…To date, hydriding nucleation on U and other kinds of metals, including gadolinium [12,13] and cerium [14], are being extensively studied. However, reports on nucleation behavior of U-based alloys are rare, except for quenched U-0.8Ti [8] and U-0.1 wt.% Cr [15][16][17].…”

Probing the cerium/cerium hydride interface using nanoindentation

“…An inconsistency exists between the morphology of cerium hydride sites found experimentally [5,6] and the lowest energy morphology predicted by Finite Element Modelling [7]. The calculations of Greenbaum et al used elastic and elastic-plastic strain energy to predict the resulting shape for instantaneous formation of a surface hydride by obtaining the minimum strain energy of the system.…”

“…Anisotropic growth kinetics that led to oblate hemispherical morphologies was demonstrated with cerium [5]. Vickers macro indentations demonstrated cerium hydride (2.2 GPa) to be significantly harder than cerium metal (0.34 GPa) [5].…”

“…Vickers macro indentations demonstrated cerium hydride (2.2 GPa) to be significantly harder than cerium metal (0.34 GPa) [5]. Nanoindentation has been used on cerium metal to obtain similar hardness values (0.4 GPa) to the macro indentation [8].…”

The anisotropic growth morphology and microstructure of plutonium hydride reaction sites

“…The same report observed a mixed phase in front of the metal/ hydride interface. Recent work on cerium hydride reaction sites suggests that anisotropic growth could be reasonably expected [13,14] therefore a detailed microstructural investigation into plutonium hydride reaction sites was conducted.…”