Enthalpy data for the zirconium-hydrogen system

Understanding Hydrogen in Zirconium

Selected examples of the Canadian contribution to the development of understanding of the behavior of hydrogen in zirconium alloys are reviewed. To solve the technical problems faced by the nuclear industry, it was necessary to have values for the solubility and diffusivity of hydrogen in the alloys, the diffusivity needed for the three gradients of concentration, temperature, and stress. With ...

In situ hydrogen loading on zirconium powder

For the first time, various hydride phases in a zirconium-hydrogen system have been prepared in a high-energy synchrotron X-ray radiation beamline and their transformation behaviour has been studied in situ. First, the formation and dissolution of hydrides in commercially pure zirconium powder were monitored in real time during hydrogenation and dehydrogenation, then whole pattern crystal struc...

Gadolinium-hydrogen Ion Exchange on Zirconium Phosphate

Hydrogen-induced transformation superplasticity in zirconium

Commercially-pure zirconium is alloyed and dealloyed repeatedly with hydrogen at 810 C, thereby cyclically triggering phase transformations between hydrogen-free a-Zr and hydrogen-alloyed b-Zr. Under an externally applied tensile stress, the internal mismatch stresses produced by the a-b transformations are biased, resulting in the accumulation of strain increments after each chemical cycle in ...

Zirconium Isotope Heterogeneities in the Solar System

Introduction: Evidence for isotopic anomalies in bulk car-bonaceous chondrites relative to other meteorites, the moon and Earth have recently been reported for several elements (Sm, Nd, Ba, Ti and Cr[1, 2, 3]). The nature of these heterogeneities is not very well understood. The isotopic composition of Zr mainly reflects a mixture of different sand r-process nucleosynthetic components. The s-pr...