Self-Diffusion of Niobium in Some of its Alloys with Molybdenum
Abstract
Self diffusion coefficients (D) were obtained for niobium alloyed with 5, 10, 20, 30 and 45 percent Mo. The values of D were determined from radioactive tracer measurements Of Nb(95) in the form of Nb2O3. Lattice parameters were determined by the powder method and both hardnesses and microhardnesses were obtained by standard methods. The self diffusion coefficient of Nb is given as a function of Mo content for temperatures ranging from 1600 to 2100 degree C while both the activation energy E and the diffusion parameter 1n D sub O are given as functions of Mo content. The relation between 1n D sub O and E is given. A list of all the diffusion parameters, hardnesses, microhardnesses and lattice parameters is presented for various temperatures and Mo content. Comparisons of E and 1n D sub O are made for the Mo-Zr system which also had a linear dependence of 1n D sub O as a function of E.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 07, 1967
- Accession Number
- AD0678313
Entities
People
- E. Y. Velmozhnyi
- G. P. Sheikin
- P. V. Geld
- V. D. Lyubimov
Organizations
- Air Force Systems Command