Home > Search Results: keywords:"poruchy krystalové mřížky|studené naprašování|torze za vysokého tlaku|spektroskopie dob života pozitronů|žíhání"
Search:
Search Tips :: Advanced Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Investigations of lattice defects in metallic coatings prepared by cold spraying
 Chmúrny, Daniel ; Čížek, Jakub (advisor) ; Stráský, Josef (referee)
Thermal stability of copper and nickel samples prepared by gas dynamic cold spraying and high pressure torsion were studied by means of positron lifetime spectroscopy and Vickers hardness test. These groups of the same materials prepared by fundamentally different methods were then compared in terms of Vickers hardness, mean positron life- time, separate positron lifetime components examination, volume of clusters of vacancies and their concentration, dislocation densities. This comparison revealed differences in thermal stability, inner defect behavior and homogeneity between the samples prepared by cold spraying and those by high pressure torsion. However, both methods manifested qualitative similarities as well. The spectra of the cold sprayed materials were calculated via simple positron trapping model while for calculations regarding those prepared by high pressure torsion the diffusion trapping model was needed due to strongly inhomoge- neous spatial distribution of defects. Annealing leads to a recrystallized state independent on the history of the concrete specimen. 1
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English