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Die numerische Lösung der Kontaktaufgabe in Radialgleitlagern unter den Bedingungen beschränkter Schmierung und trockener Reibung

100%

Bronček J. , Dzimko M.

tom Z. 13

72--80

Fűr die Bildung irgendeines physikalisch-mathematischen Modelles des tribotechnischen Prozesses, d. h. des Reibungsprozesses, des Verschleißes und der Berechnung der Gleitlagertragfähigkeit, ist die ausfűhrliche Kenntnis der tribologischen Parameter im Kontakt von zwei Gleitflächen erforderlich. Es handelt sich vor allem um die mathematische Beschreibung elastischer und plastischer Verformungen und um die Beschreibung des Gleitflächenspannungzustandes bei Kontakt und bei Belastung. Es handelt sich um die Lösung der physikalisch-mathematischen Modelle des realen Oberflächenkontakts, d. h. der rauen Oberflächen, der monometallischen Oberflächen, der Oberflächen mit Metallbeschlägen, der Oberflächen mit Kunstoffbeschlägen und so weiter.

This article deals with approximate numerical solution of the contact problem in the radial sliding bearings. The problem was solved with help of self-suggested software tool which makes possible a numerical modelling examined problem.

Tribological analysis of nanocomposited TiAlSiN layer

80%

Bronček J. , Havetta I. , Dzimko M.

tom Z. 11

53--59

Results of ball on disc principle tests to examine the friction coefficient and wear rate of nanocomposite coatings are published. Nanocomposite coating TiAlSiN (MARWIN Si) was deposited by Physical Vapour Deposition (PVD) on stainless steel AISI 304 (STN 41 7241) plates.

Comparison of roughness meaurement methods

80%

Bronček J. , Vidiečan J. , Dzimko M.

tom Z. 16

19-26

Chosen techniques in the context of surface topography measurement are described. The technical details and measurements of the device followed by several examples of its applications are then discussed. The main measurable parameters are the volume of material removed by wear and the surface area of the wear track. Both two-dimensional analysis of profiles and three-dimensional analysis of surface topography maps can be used to assess wear damage.

The thickness effects of copper interlayer on frictional properties of lead-tin thin film

71%

Takeichi Y. , Ariga N. , Li C. S. , Uemura M. , Dzimko M.

tom Vol. 4, no spec.

189-194

The effects of the thickness of copper interlayer on frictional properties of lead-tin thin films were investigated. Thin film and interlayer were formed by vacuum deposition. The thickness of lead-tin film was about 0.06, 0.09, 0.19 and 0.43 žm. Ball-on-disk type friction test was carried out in vacuum. The load was increased and decreased for the range of about 0.1 to 0.6 N in the "variable load friction test". The thin film with thicker interlayer (~ 30 nm) showed higher friction coefficient as compared to the results for the thin film with thinner interlayer (~ 3 nm). However, abrupt increase in friction coefficient by break down of thin film was not observed for the thin film with thicker interlayer. Moreover, longer endurance life was attained for the thin film with thicker interlayer in the "endurance life friction test". Adhesion of copper to glassy material is greater than that of lead or tin. Also copper would bind tightly with tin by migration. Therefore durability of thin film with thicker copper interlayer would be prolonged although friction coefficients were increased because of the higher shearing strength for copper as compared with that for lead or tin.