Dynamic hardness and elastic modulus calculation of porous SiAlON ceramics using depth-sensing indentation technique

被引：39

作者：

Sahin, Osman ^{[1
]}

Uzun, Orhan ^{[2
]}

Sopicka-Lizer, Malgorzata ^{[3
]}

Gocmez, Hasan ^{[4
]}

Kolemen, Ugur ^{[2
]}

机构：

[1] Suleyman Demirel Univ, Dept Phys, Isparta, Turkey

[2] Gaziosmanpasa Univ, Dept Phys, Tokat, Turkey

[3] Silesian Tech Univ, Dept Mat Sci, Katowice, Poland

[4] Dumlupinar Univ, Dept Ceram Engn, Kutahya, Turkey

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 06期

关键词：

mechanical properties; hardness; SiAlON; depth-sensing indentation technique; indentation;

D O I：

10.1016/j.jeurceramsoc.2007.09.052

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Interest in characterizing the mechanical properties of porous materials at micro-/nanometer scales has increased due to recent development of micro-/nanosystems. Depth-sensing indentation (DSI) systems, also referred to as nanoindentation, are strong tools for performing indentation measurements. The load-displacement curves of SiAlON-based porous ceramics were measured under different peak load (200-1800 mN). The most commonly used Oliver-Pharr method was used to analyze the unloading segments of these curves. The experimental results revealed that the dynamic hardness (H-d) and reduced elastic modulus (E,) exhibit peak-load dependence, i.e., indentation size effect (ISE). Such peak-load dependence requires calculation of the load-independent hardness (H-LI) and elastic modulus (E,). The experimental hardness data were analyzed using Meyer's law, Hays-Kendall's model, the proportional specimen resistance (PSR) model, and the modified PSR (MPSR) model. As a result, the modified PSR model is found to be the most effective one for Hd determination of these SiAlON-ceramics. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1235 / 1242

页数：8

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