ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Specific phase transitions to the compound-like impurity nanosegregation structures atdislocations and grain boundaries in metals and their influence on diffusion-assisted processes areconsidered, mainly, on the basis of the thermodynamic analysis of the related experimental data.The following systems and aspects are in detail considered: (1) the hydride-like nanosegregation ofhydrogen at dislocations and grain boundaries in palladium and their influence on the apparentcharacteristics of hydrogen solubility and diffusivity in palladium; (2) the physics of the anomalouscharacteristics of diffusion of Fe and other transition impurities in crystalline Al at elevatedtemperatures, the role of the compound-like nanosegregation (CLNS) of Fe and the others atdislocations and grain boundaries in Al, analysis of the Mössbauer and diffusion data on CLNS ofFe at grain boundaries and dislocations in Al; (3) some new physical aspects of internal oxidationand nitridation of metals (for Cu-0.3%Fe alloy/Cu2O surface layer, and for (Ni-5%Cr) alloy / N2gas), the role of the compound-like impurity nanosegregation at dislocations and grain boundaries,study results on the deviations from the classical theories predictions and their interpretation. Thepossibility is considered of nanotechnology applications of the study results for creation ofnanostructured metals with compound-like nanosegregation structures at grain boundaries, in orderto obtain specific physical and mechanical properties of such a cellural-type nanocomposites. Inparticular, it can be complex hydride-like, carbide-like, nitride-like, carbide-nitride-like, oxide-likeor intermetallide-like nanosegregation structures at grain boundaries of nanostructured metals
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.138.91.pdf
