Mechanical Properties of Nanocrystalline Tetragonal Zirconia Stabilized with CaO, MgO and Y_2O_3

• Authors: O. Sahin , İ. Demirkol , H. Göcmez , M. Tuncer , H. Ali Cetinkara , H. Salih Güder , E. Sahin , A. Rıza Tuncdemir
• Languages of publication: EN

Abstracts

EN

The citrate gel method, similar to the polymerized complex method, was used to synthesize homogeneous tetragonal zirconia at 1000°C. Nanocrystalline tetragonal phase has been fully stabilized at wide temperature range with 10 mol.% CaO, MgO, and Y_2O_3 addition. Scanning electron microscopy, X-ray diffraction, and microhardness tests are used to characterize synthesized materials. The grain size and dislocation density were calculated from X-ray diffraction data. The examined material exhibits indentation size effect behavior. Results revealed that the Vickers and Knoop microhardness are dependent on indentation test load. Geometrically necessary dislocation model and modified proportional resistance model are used to analyze the load dependence of the microhardness. The highest hardness values were obtained for the samples with CaO addition; however the lowest values were acquired for sample stabilized with Y_2O_3 by using both Knoop and Vickers techniques. This situation might be explained using the Hall-Petch relation.

Keywords

EN

62.20.-x; 62.20.F-

Discipline

• 62.20.-x: Mechanical properties of solids
• 62.20.F-: Deformation and plasticity(see also 83.50.-v Deformation and flow in rheology; for materials treatment effects on deformation, see 81.40.Lm)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 2
• Pages: 296-298

Dates

published

2013-02

Contributors

author

O. Sahin

• Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey

author

İ. Demirkol

• Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey

author

H. Göcmez

• Department of Ceramic Engineering, Dumlupinar University, Kutahya, Turkey

author

M. Tuncer

• Department of Ceramic Engineering, Dumlupinar University, Kutahya, Turkey

author

H. Ali Cetinkara

• Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey

author

H. Salih Güder

• Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey

author

E. Sahin

• Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey

author

A. Rıza Tuncdemir

• Department of Prosthetic Dentistry, Dentistry Faculty, Mustafa Kemal University, Hatay, Turkey

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Identifiers

DOI

10.12693/APhysPolA.123.296