Indentation size effect of Y-TZP dental ceramics

Majić Renjo, Marijana and Ćurković, Lidija and Štefančić, Sanja and Ćorić, Danko (2014) Indentation size effect of Y-TZP dental ceramics. = Indentation size effect of Y-TZP dental ceramics. Dental Materials, 30 (12). e371-e376. ISSN 0109-5641. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2013). Točan broj autora: 4.

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Objective. The purpose of this study was to investigate and analyze the indentation size effect (ISE) in Vickers hardness of monolithic yttria partially stabilized zirconia (Y-TZP) dental ceramics without and with the addition of dental dye A3. The ISE is analyzed using the Mayer law, a proportional specimen resistance (PSR) model and a modified proportional specimen resistance (MPSR) model. Methods. Two samples of Y-TZP dental ceramics, trade names BruxZir (provided by Glidewell Laboratories, CA, USA), were investigated. The first sample was polished Y-TZP and the second sample was polished Y-TZP with the addition of dental dye A3, by VITA Classical Shade Guide. The Vickers hardness was measured under the following loads: 0.49 N, 0.98 N, 1.96 N, 4.90, 9.81 N and 29.42 N. Thirty indentations were made on each sample, under each load. Relationships between the applied load, F, and the resulting indentation size, d, have been analyzed by the Mayer law, the PSR model and the MPSR model. Results. The Meyer index (n) for both Y-TZP dental ceramics is less than 2, which indicates that hardness is dependent on test loads. The PSR model and the MPSR model were used to calculate "true" Vickers hardness or load-independent hardness. Significance. All applied mathematical models are suitable for the data analysis, which is confirmed with high correlation coefficients, but the best correlation between measured values and mathematical models was achieved with the MPSR model with a correlation coefficient of 0.9999. © 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Ceramic materials; Dental materials; Indentation; Mathematical models; Size determination; Yttria stabilized zirconia; Yttrium alloys; Zirconia; Ceramics; Correlation coefficient; Indentation size effects; Investigate and analyze; Monolithic zirconias; Proportional specimen resistance model; Proportional specimen resistances; Yttria partially stabilized zirconia; Vickers hardness
Subjects: TECHNICAL SCIENCE > Chemical engineering
TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1000 Department of Materials > 1010 Chair of Materials and Tribology
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Citations JCR: 0 (3.6.2015.)
Quartiles: Q1 (2013)
Citations SCOPUS: 0 (3.6.2015.)
Date Deposited: 27 May 2015 09:50
Last Modified: 03 Jun 2015 07:20

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