Metals and alloys
For the fcc noble metals and for bcc metals of group V and VI such as Mo, W, V, and Nb, atomic diffusion is slow compared to the case of bcc alkali metals Li, Na, or K. The group IV metals Ti, Zr, and Hf have still higher diffusivities. The first section of the chapter describes the investigation of sodium diffusion, in particular presenting the encounter model of vacancy diffusion in detail. The second part deals with similar experiments on bcc-β-titanium, where the relation between high diffusivity and soft modes as measured by triple axis spectrometry is explained. QENS diffusion studies are also performed for some alloys and intermetallic compounds.
Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.
If you think you should have access to this title, please contact your librarian.