Diffusion in metals

A review about diffusion in metals has been completed and published as a chapter in a book on "Diffusion in Condensed Matter."

Diffusion of Pd and Ir in aluminium single crystals has been studied as a function of temperature using the radiotracer sectioning technique. Pd diffuses significantly slower than Al with a high activation enthalpy and a high pre-exponential factor. The heavy transition metal Ir diffuses slightly faster than Al self-diffusion and its activation parameters are quite normal.

Recent progress from our laboratory which concerns diffusion in various intermetallic phases has been summarized. Relevant factors which influence diffusion such as crystal structure, state of order, temperature, composition, and some consequences for the atomic mechanisms of diffusion have been discussed.

Drittmittelgeber:

Deutsche Forschungsgemeinschaft

Beteiligte Wissenschaftler:

Dr. K. Freitag (Universität Bonn), Dipl.-Phys. R. Galler, Dipl.-Phys. Chr. Khoukaz (bis Mai 2000), Prof. Dr. H. Mehrer (Leiter), Dr. F. Wenwer (bis Sept. 1997)

Veröffentlichungen:

Mehrer, H., F. Wenwer: Diffusion in metals, in: Diffusion in Condensed Matter, Vieweg Verlag 1998, 1 - 58

Khoukaz, Chr., H., Mehrer: Solute diffusion of Pd and Ir in aluminium, Z. Metallkde. 91, 888 - 896 (2000)

Mehrer, H., Chr. Herzig: Diffusion in intermetallic compounds - Recent Progress Advances in Science and Technology 29, Mass and Charge Transport in Inorganic Materials: Fundamentals to Devices; P. Vicenzini, V. Buscaglia (Editors), Techna Srl. 2000, p. 187 - 196