Determination of resistance to cavitation of pyrophyllite samples

Dragan Radulović; Marko Pavlović; Marina Dojčinović

doi:10.5937/zasmat2102126A

Autori

Dragan Radulović Institute of Technology of Nuclear and Other Mineral Row Materials - ITNMS, Belgrade, Serbia Autor
Marko Pavlović Kontrol Inspekt-Beograd, Beograd Autor
Marina Dojčinović University of Belgrade, Faculty of Technology and Metallurgy, Serbia Autor

DOI:

https://doi.org/10.5937/zasmat2102126A

Ključne reči:

pirofilit, kavitaciona otpornost, gubitak mase, morfologija oštećenja, analiza slike

Apstrakt

U radu je ispitivana otpornost pod dejstvom kavitacije uzoraka sinterovanog pirofilita. Polazni uzorak pirofilita iz ležišta Parsović-BiH mleven je u vibracionom mlinu na granulaciju 20mm, presovan je i sinterovan na temperaturama (ºC): 1000; 1100; 1200. Za procenu kavitacione otpornosti praćena je promena mase uzorka u funkciji vremena delovanja kavitacije. Primenjena je ultrazvučna vibraciona metoda sa stacionarnim uzorkom prema standardu ASTM G32. Izračunate su kavitacione brzine za sve uzorke, kao osnovni pokazatelj otpornosti materijala pod dejstvom kavitacije. Promena morfologije površine uzorka sa vremenom ispitivanja praćena je primenom skenirajuće elektronske mikroskopije. Na osnovu vrednosti kavitacione brzine i analize morfologije oštećenja površine određena je kavitaciona otpornost ispitivanih uzoraka na bazi pirofilita. Dobijeni rezultati ukazuju da uzorci sinterovanog pirofilita imaju zadovoljavajuću otpornost na dejstvo kavitacije i mogu se primeniti u uslovima manjih kavitacionih opterećenja.

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