National Repository of Grey Literature 34 records found  beginprevious25 - 34  jump to record: Search took 0.00 seconds. 
Mechanical Properties of TiCN Layers
Bláhová, O. ; Prušáková, L. ; Sobota, Jaroslav ; Fořt, Tomáš ; Grossman, Jan ; Fajkus, M.
The work deals with problems of evaluation mechanical properties of thin wear resistance layers deposited by PACVD method. Nanoindenter XP carried out the nanoindentation measurements with continuous stiffness measurement. The tribological properties were carrying out by high temperature pin-on-disk tribometer and by impact tester.
Studium mechanických vlastností kovových vrstev na křemíkové podložce
Dušek, J. ; Buršíková, V. ; Sobota, Jaroslav ; Buršík, Jiří ; Bláhová, O. ; Klapetek, P. ; Vladoiu, R. ; Navrátil, V.
The mechanical properties of metallic thin films deposited on silicon by magnetron sputtering and Thermoionic vacuum arc were studied using two different type of indentation methods - the depth sensing indentation test (DSI) and the continuous stiffness measurement method (CSM).
Testování a modelování napěťových polí v tenkých tvrdých nanokompozitních multivrstvých a monovrstvých povlacích
Fořt, Tomáš ; Grossman, Jan ; Sobota, Jaroslav
To optimize the design of a coating/substrate system before the deposition we apply modelling of the stress fields in the coating/substrate system. After the deposition of the designed system we use the dynamic impact tester to evaluate wear resistance of the system in dynamical load.
Testing of the impact load of hard wear resistant coatings
Sobota, Jaroslav ; Fořt, Tomáš ; Grossman, Jan
The dynamic impact wear tester developed in our laboratory has been used to evaluate hard wear resistant coatings. After each test, wear scars were evaluated by means of optical microscope and profilometer. Results of these tests show usability of various types of coatings in dynamic load and enable to optimize the design of the coating/substrate system.
Testování odolnosti vůči nárazu tvrdých nanokompozitních povlaků
Fořt, Tomáš ; Sobota, Jaroslav ; Grossman, Jan
To evaluate the impact resistance of hard nanocomposite coatings in dynamic loading wear applications an impact test using system developed at the Institute of Scientific Instruments in collaboration with Brno University of Technology has been used. During testing the specimen is cyclically loaded by a ball that impacts of the coating surface. After the test, wear scars were evaluated by means of scanning electron microscope, spectral analyses and profilometer. The impact test offers an important new method for determination of the fracture toughness of hard thin coatings and simulates a wide range of tribological systems.
Testing of Coating/Substrate System Deposited by CVD and PACVD Methods by Impact Tester
Fajkus, M. ; Fořt, Tomáš ; Grossman, Jan ; Hořejš, S. ; Sobota, Jaroslav
The dynamic impact wear tester developed in our laboratory has been used to evaluate CVD and PACVD hard coatings deposited in VÚHŽ. After each test, wear scars were evaluated by means of optical microscope and profilometer. Results of these tests show usability of various types of coatings in dynamic load and enable to optimize the design of the coating/substrate system for the particular use.
Dynamic impact wear testing of nanostructured coatings
Boušek, Jaroslav ; Sobota, Jaroslav
Successive impacts of the cemented carbide ball onto a film coated sample induce high contact loads, which can vary in amplitude depending on the probe mass and the velocity of the probe immedialtely before the stroke. The method permits the variation of the impact force, the impact frequency and the number of impacts. Thus it is possible to quantify the number of the load cycles which a coated component can withstand and define a critical fatigue force. A simple probe including electronic circuity for this method use was designed. The basic equipment scheme and example of measurement are given.

National Repository of Grey Literature : 34 records found   beginprevious25 - 34  jump to record:
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1 Sobota, J.
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