Прегледај по Аутор "Bučko, Mihael M."

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    MATHEMATICAL MODEL FOR TEMPERATURE CHANGE OF A JOURNAL BEARING
    (Vinča Nuclear Research Institute, Belgrade, Srbija, 2018) Antunović, Ranko; Halep, Amir; Bučko, Mihael M.; Perić, Sreten R.
    In this work, a representative mathematical model has been developed, which re-liably describes the heating and cooling of a journal bearing as a result of its malfunctioning, and the model has been further confirmed on a test bench. The bearing model was validated by using analytical modeling methods, i. e. the ex-perimental results were compared to the data obtained by analytical calculations. The regression and variance analysis techniques were applied to process the rec-orded data, to test the mathematical model and to define mathematical functions for the heating/cooling of the journal bearing. This investigation shows that a representative model may reliably indicate the change in the thermal field, which may be a consequence of journal bearing damage.
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    Specifičnosti elektrohemijskog taloženja i morfologija Zn–Mn prevlaka dobijenih iz pirofosfatnog elektrolita
    (Association of the Chemical Engineers of Serbia, 2011) Bučko, Mihael M.; Stevanović, Sanja I.; Tomić, Milorad V.; Pavlović, Miomir G.; Bajat, Jelena B.
    U proteklih nekoliko godina pokazano je da se alkalni pirofosfatni elektrolit može primeniti za elektrohemijsko taloženje prevlaka Zn−Mn legura na čeliku. U ovom radu je ispitana zavisnost morfologije i hemijskog sastava Zn−Mn prevlaka od primenjene gustine struje taloženja. Karakterizacija prevlaka vršena je mikroskopijom atomskih sila i energetskom disperzionom atomskom analizom. Metodom linearne voltametrije ispitan je uticaj dodatka, askorbinske kiseline, na katodne procese. Utvrđeno je da se iz alkalnog rastvora mogu dobiti prevlake zadovoljavajućeg kvaliteta, ali da gustina struje ima veliki uticaj na homogenost i hrapavost površine Zn−Mn prevlaka. Askorbinska kiselina inhibira redukciju vodonika i povećava iskorišćenje struje za taloženje legure.