Naslov
Critical evaluation of indentation fracture toughness measurements with Vickers indenter on yttria-stabilized zirconia dental ceramics = Kritische Bewertung der mittels Vickers-Indentierung ermittelten Bruchzähigkeit von mit Yttriumoxid stabilisierten tetragonalen Zirkonoxid-Dentalkeramiken
(Critical evaluation of indentation fracture toughness measurements with Vickers indenter on yttria-stabilized zirconia dental ceramics)

Autori
Ćorić, Danko ; Majić Renjo, Marijana ; Žmak, Irena

Izvornik
Materialwissenschaft und Werkstofftechnik (0933-5137) 48 (2017), 8; 767-772

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Zirconia, Yttria-stabilized zirconia ceramics ; Dental ceramics ; Fracture toughness ; Vickers indentation test

Sažetak
The purpose of this study was to investigate and analyze fracture toughness (KIc) of yttria stabilized tetragonal zirconia (Y-TZP) dental ceramics by the Vickers indentation fracture test. In order to determine fracture toughness, the Vickers indenter was used under the load of 294.20 N (HV30). The cracks, which occur from the corners of a Vickers indentation, were measured and used for fracture toughness determination, through five mathematical models according to (I) Anstis, (II) Evans and Charles, (III) Tanaka, (IV) Niihara, Morena and Hasselman and (V) Lankford. Morphology of indentation cracking was determined by scanning electron microscope. The most adequate model for determination of fracture toughness (KIc) of yttria stabilized tetragonal zirconia dental ceramics by the Vickers indentation fracture test is Lankford model.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA