Solubility and Diffusion of Hydrogen in Zirconium

Abstract

solubility and Diffusion of Hydrogen in Zirconium． The solubility of hydrogen in zlrconlum was determined as a function of temperature（range： 500。to 900。C）and pressuぐe （range：10哨3 to 3αmmHg）．The diffusion coefficients for H inα一 Zr（range：450。 to 700。C）an．d inβ一Zr（range：8700 to 11000C）were calculated by diffusion－ annealing method， which consisted of annealing the diffusion couples of diffe：rent hydrogen． contents in Pb bath， and analysing the hydrogen gradient across the diffusion zone． The calculated diffusion coefficients of H inα一andβ一Zr are expressed， respectively， as： 1）α＝4．15×10－3exp（一9470／1～T） cm2／sec （450～7000C） Dβ＝7．37×10－3exp（一8540／．RT） cm2／sec（870～1100。C）