Percolation effects during interdiffusion in the Cu-NiAl system

✍ Scribed by E Rabkin; V.N Semenov; A Winkler

• Book ID: 104402793
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 235 KB
• Volume: 50
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/s1359-6454(02)00144-1

✦ Synopsis

The interdiffusion in Cu-(Ni-43 at.% Al) system was studied. It was shown that in the diffusion zone Cu atoms substitute mainly Al atoms and the diffusion problem can be treated as a quasibinary. The concentration dependencies of interdiffusion coefficient were determined in the temperature range of 923-1273 K. The rapid increase of interdiffusion coefficient in the narrow region of Cu concentrations was interpreted in terms of percolation model. Calculated percolation threshold for Cu atoms (6.06 at.%) agrees well with the experimental data.