Fatigue behavior of Y-TZP ceramic after surface treatments

Amaral M, Cesar PF, Bottino MA, Lohbauer U, Valandro LF (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Journal of the Mechanical Behavior of Biomedical Materials Elsevier

Book Volume: 57

Pages Range: 149-56

DOI: 10.1016/j.jmbbm.2015.11.042

Abstract

The aim of this study was to evaluate the effect of three surface treatments on the biaxial flexural strength before and after mechanical cycling, and fatigue limit of a Y-TZP ceramic.Disc-shaped specimens were produced and three surface conditions were tested: CT (as-sintered, untreated), GL (thin layer of porcelain glaze), and AA (air abrasion with 30µm silica particles). Profilometric and phase transformation analyses were performed. Disks were submitted to biaxial flexural strength (BFS) before and after mechanical cycling (100N, 2×10(6) cycles) and staircase approach (n=20). The flexural fatigue limits (FFLs) were obtained at 10(2), 10(3), 10(4) and 10(5) cycles.Tetragonal to monoclinic transformation was only observed for AA group (9.46% of monoclinic phase). Glazed group presented the highest Ra values. Flexural strength was higher for AA group; CT and GL groups were similar. The reliability was similar between groups. The mechanical cycling at 100N did not affected flexural strength. FFLs were higher for AA group, and the three surface treatments presented decrease in strength according to the increase in number o cycles.

Authors with CRIS profile

Ulrich Lohbauer Medizinische Fakultät

Additional Organisation(s)

Department of Operative Dentistry and Periodontology

Involved external institutions

Federal University of Santa Maria / Universidade Federal de Santa Maria (UFSM) BR Brazil (BR) São Paulo State University / Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP) BR Brazil (BR) University of São Paulo / Universidade de São Paulo (USP) BR Brazil (BR)

How to cite

APA:

Amaral, M., Cesar, P.F., Bottino, M.A., Lohbauer, U., & Valandro, L.F. (2016). Fatigue behavior of Y-TZP ceramic after surface treatments. Journal of the Mechanical Behavior of Biomedical Materials, 57, 149-56. https://dx.doi.org/10.1016/j.jmbbm.2015.11.042

MLA:

Amaral, Marina, et al. "Fatigue behavior of Y-TZP ceramic after surface treatments." Journal of the Mechanical Behavior of Biomedical Materials 57 (2016): 149-56.

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