Preparation of Fine-Grained Silicon-Nitride Ceramics and their Characterization by Depth-Sensing Indentation Tests

• Authors: O. Şahin , H. Güder , O. Uzun , E. Şahin , M. Sopicka-Lizer , H. Göçmez , E. Artunc
• Languages of publication: EN

Abstracts

EN

Both pressureless-sintered and dense, fine-grained silicon nitride ceramics were produced from mechanochemically activated nitride-based precursors. Scanning Electron Microscopy (SEM), Transmition Electron Microscopy (TEM), X-Ray Diffraction (XRD) and an ultra-low load microhardness tester were used to characterize these ceramics. Depth-sensing indentation (DSI) tests in the range of 200-1800 mN were performed on the silicon nitride ceramic to determine dynamic hardness (H_d) and reduced elastic modulus (E_r) values. These values were deduced by analyzing the unloading segments of the DSI curves. It was found that both H_d and E_r exhibits a significant indentation load dependence. Nix-Gao (NG) model was used to analyze the dynamic hardness data in the calculation of the load independent hardness value.

Keywords

EN

62.20.-x; 62.20.de; 81.05.Je

Discipline

• 62.20.de: Elastic moduli
• 62.20.-x: Mechanical properties of solids
• 81.05.Je: Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)(for ceramics in electrochemistry, see 82.45.Yz)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 2B
• Pages: B-355-B-359

Dates

published

2015-8

Contributors

author

O. Şahin

• Mustafa Kemal University, Department of Physics, Micro/Nanomechanic Characterization Laboratory, Hatay, Turkey

author

H. Güder

• Mustafa Kemal University, Department of Physics, Micro/Nanomechanic Characterization Laboratory, Hatay, Turkey

author

O. Uzun

• Bülent Ecevit University, Faculty of Engineering, Zonguldak, Turkey

author

E. Şahin

• Mustafa Kemal University, Department of Physics, Micro/Nanomechanic Characterization Laboratory, Hatay, Turkey

author

M. Sopicka-Lizer

• Silesian University of Technology Department of Materials Science, Katowice, Poland

author

H. Göçmez

• Dumlupnar University Department of Ceramic Engineering, Kütahya, Turkey

author

E. Artunc

• Süleyman Demirel University, Department of Physics, Isparta, Turkey

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Identifiers

DOI

10.12693/APhysPolA.128.B-355