153 research outputs found
An innovative method based on the difference of material wettability to gain an efficient lubricant condition
No full textIn this work, the subject of many years’ research by the author, a vast number of tribological couplings in water environment is examined and an innovative method for an efficient lubricant condition, based on the difference of material wettability is presented
A new hip prosthesis without debris release
No full textsi presenta una nuova protesi e il meccanismo di lubrificazioneThis paper present an alternative bearing surface that is made of a Peek carbon fibre femoral cup and a CoCr alloy femoral head or vice versa.
In this work, which has been developed by the author for many years, a large number of tribological couplings is examined and an innovative method for an efficient lubricant condition, based on the difference of material wettability is proposed
Evolution, phylogeny and classification of Suctorea (Ciliophora)
No full textThe monograph is concerned with suctorian ciliates. Using the materials collected
and generalizing all literary data available, the author has proposed original hypotheses
of suctorians’ origin and the main regularities of the evolution of the taxa. A new scheme
of phylogeny of Suctorea has also been elaborated. Based on this research a new system
of the class Suctorea, including 4 subclasses, 15 orders, 2 suborders, 41 families and
124 genera, has been proposed
Water tribology An innovative metod to gain an efficient lubricant conditions
No full textWater tribololoy is a relevant branch of tribology, it is sufficient to think of the diverse cases of tribological couplings in water environment. It is therefore important to study the materials in tribological coupling but it is still more important to study the mechanism that allows the formation of the supporting meatus between two surfaces in couplings i.e. produces an efficient lubrication condition. In this work which has been developed by the author for many years a large number of tribological couplings is examined and an innovative method for an efficient lubricant condition, based on the difference of material wettability is proposed.
Materials with different wettabilities (the wettability of each material was measured using the model of the contact angle θ ) and with two different roughness intervals Ra (0.003-0.08) and Ra (0.08-3) were taken into consideration. Wear tests (ASTM 99G) of tribological couplings among materials with different wettabilities, were performed with a pin-on disc tribometer. The test has be realized in air environment, under the following conditions: dry and water lubrication using demineralised water as a lubricant.
From the wear test results and from the electronic microscope observation, the following result was obtained: the higher is the wettability difference (Δθ) between coupling materials, the more efficient is the lubricant condition, i.e. a stable supporting meatus is formed
Kompleks Besi(II) dengan Lingan 1,10-Fenantrolin 4,7-Dimetil-1,10-Fenantrolin KARAKTERISASI SECARA Spektrometri Ultraungu-Tampak
No full textKomplek Campuran Co(Ii) Dan Mn(Ii) Dengan 1,10-Fenantrolin Dan Rodanida. 1.Studi Pengomplekan Secara Spektrometri Inframerah
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