Hydrogen Overvoltage of Zirconium

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 ...

Doping in the Valley of Hydrogen Solubility: A Route to Designing Hydrogen-Resistant Zirconium Alloys

Mostafa Youssef, Ming Yang, and Bilge Yildiz Department of Nuclear Science and Engineering, Laboratory for Electrochemical Interfaces, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA (Received 22 ...