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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Chemical aspects of antiballistic cermets preparation
 Brožek, Vlastimil ; Kubatík, Tomáš František ; Chráska, Tomáš ; Mušálek, Radek ; Janata, Marek ; Mastný, L.
The paper aims to demonstrate the possibilities of metal-ceramic material deposition on different types of metal or ceramic substrates using plasma deposition. A number of self-supporting components and the preparation of metal-braced composites are described and the results of plasma depositions of two particular extremely hard ceramic materials, boride and nitride of titanium are presented. The plasma deposition of these material is performed in technological conditions which prevent undesirable high-temperature oxidation. The paper describes deposition conditions that may lead to materials suited to create anti-ballistic protection and complicated shapes or improve parameters of surface layers of present anti-ballistic ceramics.
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Ceramic coatings prepared by liquid precursor plasma spraying
 Brožek, Vlastimil ; Kutílek, Zdeněk ; Bertolissi, Gabriele ; Mastný, L.
LPPS method (Liquid precursor plasma spraying) was performed using aqueous solutions of ammonium vanadate and chromate in order to přepade nano-crystalline ceramic coatings on steel and ceramic substrates. Their structure was studied and verified by injecting at different conditions the liquid precursors into the stream of water stabilized plasma. The surface coverage of nano-coatings is inversely proportional to the concentration of precursor and largely depends on the geometric arrangement of the depositing device in which there is a complex process multistage precursor processing within milliseconds.
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Chemical aspects of the anti-ballistic armors preparation by plasma deposition
 Brožek, V. ; Chráska, T. ; Mušálek, R. ; Neufuss, Karel
This paper informs about possibility to deposit ceramic-metallic composites on different types of metallic and ceramic substrates by thermal spraying, namely plasma spraying. Preparation of free-standing deposits as well as metal-reinforced composites is described. Results of plasma deposition of two ultra-hard ceramic materials (titanium boride and nitride) are presented in more details. Plasma deposition of materials carried out in specific technological conditions preventing undesirable high-temperature oxidation of ultra-hard ceramics is costly. Therefore, deposition conditions which should lead to improvement of surface properties of currently used antiballistic ceramics were studied and described.
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