National Repository of Grey Literature 15 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Study of mechanical properties of nanolayered Ti/Ni coatings
Zábranský, L. ; Václavík, R. ; Přibyl, R. ; Ženíšek, J. ; Souček, P. ; Buršík, Jiří ; Fořt, Tomáš ; Buršíková, V.
The aim of the present work was to study the dependence of mechanical properties of Ti/Ni multilayer thin films on the thicknesses of constituent Ti and Ni layers. The multilayer thin films were synthesized by deposition of Ti and Ni layers alternately on single crystalline silicon substrates using direct current magnetron sputtering method. Thicknesses of Ti and Ni layers varied from 1.7 nm to 100 nm. The micro-structure of the multilayer films was studied using X-ray diffraction technique, scanning electron microscopy with focused ion beam technique and transmission electron microscopy. Mechanical properties obtained from nanoindentation experiments were discussed in relation to microstructural observations.
W-B-C Nanostructured Layers - Microstructure and Mechanical Properties
Buršík, Jiří ; Kuběna, Ivo ; Buršíková, V. ; Souček, P. ; Zábranský, L. ; Mirzaei, S. ; Vašina, P.
Several W-B-C layers were prepared by magnetron sputtering. The microstructure of thin layers was observed by means of scanning and transmission electron microscopy on cross sections prepared using a focused ion beam. Both undisturbed layers and the volume under indentation prints were inspected.
Characterization of Ta-B-C nanostructured hard coatings
Buršík, Jiří ; Buršíková, V. ; Souček, P. ; Zábranský, L. ; Vašina, P.
Microstructure and mechanical properties of Ta-B-C nanocrystalline layers prepared by magnetron sputtering were studied. DC magnetron sputtering was used to prepare thin layers on rotated substrates. Various deposition parameters were tested. Microstructure of layers was studied by means of scanning and transmission electron microscopy on thin lamellar cross sections prepared using a focussed ion beam. Both undisturbed layers and the volume under relatively large indentation prints (load of 1 N) were observed. The microstructure observations were correlated with mechanical properties characterized by means of nanoindentation experiments in both the static and the dynamic loading regime. Elastic modulus, indentation hardness and fracture resistance of prepared nanostructured coatings were evaluated and discussed.
Impact resistence on nanocomposite Mo-B-C- and W-B-C coatings deposited using magnetron sputtering technique
Fořt, Tomáš ; Grossman, Jan ; Daniel, Josef ; Sobota, Jaroslav ; Dupák, Libor ; Buršíková, V. ; Zábranský, L. ; Souček, L. ; Mirzaei, S. ; Alishahi, M. ; Vašina, P. ; Buršík, Jiří
Recently, based on attractive mechanical properties of boride and carbide based X2BC ternary compounds (X = Mo, W and Ta) they became subjects of both theoretical calculations and experimental work. In the case of stoichiometric composition, X2BC with X = Mo, W and Ta are very promising candidates for protection of cutting and forming tools due to their unusually stiffness and moderate ductility.\nIn this work we focus on nanostructured Mo-B-C and W-B-C layers grown by magnetron sputtering on high speed steel (HSS) substrates. Mechanical properties of the layers were characterized by nanoindentation experiments in both static and dynamic loading regimes. Elastic modulus, indentation hardness and fracture resistance were evaluated and discussed. The fracture resistance of both Mo-B-C and W-B-C coatings was compared using both indentation and dynamic impact tests.\n
Characterization of Mo-B-C nanostructured coating microstructure by means of AEM and GDOES
Buršík, Jiří ; Svoboda, Milan ; Švábenská, Eva ; Buršíková, V. ; Souček, P. ; Zábranský, L. ; Vašina, P.
A Mo-B-C nanostructured coating was prepared on WC-Co hard-metal substrate by magnetron sputtering. The details of microstructure of deposited thin layer as well as elements redistribution caused by subsequent annealing at 1000°C were studied by several experimental techniquec.
Compounds in Old Church Slavonic
Zábranský, Lukáš ; Čermák, Václav (advisor) ; Bláhová, Emílie (referee) ; Bauerová, Helena (referee)
In the dissertation Compounds in Old Church Slavonic, the author seeks to shed light on the issue of how to view words formed by composition in the Old Church Slavonic literature. The methodology of processing compounds in Old Church Slavonic is discussed in a separate chapter, which also summarises the recent literature on compounds with the references to key works. It goes on to explain and justify the principles adopted for the analysis of lexemes. Individual chapters, in addition to the various types of composition and the types of compounds divided by the author, also deal with the genre or frequency of specific examples. In the first place it was with a justification defined which lexical units were taken into account in the paper and vice versa, which were not included in the corpus. In the chapter on the methodology, the use of criteria and aspects was justified. Subsequently, a space was devoted to the issue of the so-called connecting morpheme of compounds, its origin and form in specific lexemes, an analysis from a formal point of view. The order of criteria in chapters is determined by their scope, i.e. their applicability to a greater or lesser range of compounds. Statistical data was taken into account in individual groups of lexemes. Subsequently, the compounds were examined in terms of word...
Compounds in Old Church Slavonic
Zábranský, Lukáš ; Čermák, Václav (advisor) ; Bláhová, Emílie (referee) ; Bauerová, Helena (referee)
In the dissertation Compounds in Old Church Slavonic, the author seeks to shed light on the issue of how to view words formed by composition in the Old Church Slavonic literature. The methodology of processing compounds in Old Church Slavonic is discussed in a separate chapter, which also summarises the recent literature on compounds with the references to key works. It goes on to explain and justify the principles adopted for the analysis of lexemes. Individual chapters, in addition to the various types of composition and the types of compounds divided by the author, also deal with the genre or frequency of specific examples. In the first place it was with a justification defined which lexical units were taken into account in the paper and vice versa, which were not included in the corpus. In the chapter on the methodology, the use of criteria and aspects was justified. Subsequently, a space was devoted to the issue of the so-called connecting morpheme of compounds, its origin and form in specific lexemes, an analysis from a formal point of view. The order of criteria in chapters is determined by their scope, i.e. their applicability to a greater or lesser range of compounds. Statistical data was taken into account in individual groups of lexemes. Subsequently, the compounds were examined in terms of word...
Deposition of Hard Yet Moderately Ductile MoBC Coatings by p-DC Magnetron Sputtering
Souček, P. ; Buršíková, V. ; Zábranský, L. ; Buršík, Jiří ; Vašina, P.
Novel nanolaminated MoBC coatings were prepared using a combination of non-reactive direct current and pulsed direct current magnetron sputtering. Depending on the deposition conditions the coatings were either of amorphous or of nanocomposite nature. Nanocomposite coatings showed good hardness and Young’s modulus and showed no tendency to form cracks even for high-load nanoindentation testing.
Study of fracture toughness and wear resistance of thin MoBC coating under dynamic conditions
Buršíková, V. ; Grossman, Jan ; Fořt, Tomáš ; Souček, P. ; Zábranský, L. ; Buršík, Jiří ; Vašina, P. ; Dupák, Libor ; Sobota, Jaroslav
The aim of the present work was to study the mechanical properties of thin amorphous MoBC coatings and MoBC coatings consisting of nanocrystalline Mo2BC embedded in amorphous MoBC matrix. The hardness of the amorphous MoBC coatings (20 GPa) is comparable with the common amorphous diamond-like carbon coatings, however their elastic modulus as well as fracture toughness and ductility are significantly higher. Magnetron sputtering of three targets, B4C, C and Mo, for MoBC was used for coatings preparation. The aim of this work was to study the mechanical and tribological properties of MoBC coatings deposited on high speed steel substrate. The classification of MoBC coatings was performed using an impact tester in a dynamic mode and enabled us to predict the limit load causing the coating destruction.

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See also: similar author names
3 ZÁBRANSKÝ, Luboš
2 Zábranský, L.
4 Zábranský, Lukáš
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