Stress-Induced Changes to the Triple-Point Phase Boundary of the Niobium-Deuterium System

Abstract

The effects of mechanical stress, due to cold rolling, on the triple-point phase equilibrium in the niobium-deuterium system have been investigated using differential scanning calorimetry. Both unstressed and stressed foil samples of niobium-deuterium were analyzed over the temperature range 323 to 398 K. Over this temperature range, niobium-deuterium undergoes several phase changes (depending on the composition of the niobium-deuterium specimen). Differential scanning calorimetry allowed determination of temperature, energy, and compositional characteristics of these phase changes. It has been found that mechanical deformation has a significant effect on all of these characteristics.

A Comparative Assessment of Hydrogen Embrittlement: Palladium and Palladium-Silver (25 Weight% Silver) Subjected to Hydrogen Absorption/Desorption Cycling

“…The influence of hydrogen absorption and desorption on many important properties of such systems has been the focus of many fundamental studies into solid-gas systems for decades. There have been investigations focused on the thermodynamic properties of these materials [1], electrical properties [2], optical properties [3], structural properties [4], phase stability properties [5] and mechanical properties [6]. These materials are at the center of truly multidisciplinary investigations and are studied by chemists, physicists, engineers, materials scientists and metallurgists.…”