Nanoindentation hardness of submicrometer alumina ceramics

被引：117

作者：

Krell, A

Schädlich, S

机构：

[1] Fraunhofer Inst Ceram Technol & Sintered Mat, IKTS, D-01277 Dresden, Germany

[2] Fraunhofer Inst Mat & Beam Technol, IWS, D-01277 Dresden, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2001年 / 307卷 / 1-2期

关键词：

hardness; grain size effect; load influence; ceramics; alumina;

D O I：

10.1016/S0921-5093(00)01818-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanoindentations at loads of 20-200 mN were performed on submicrometer sintered alumina ceramics of different residual porosity. The indentation size effect of the hardness call be obtained without variation of the maximum load directly from loading curves, if the Young's modulus of the material is known and if the shape of the penetration curve is analyzed carefully. Similar influences of testing load (indentation size effect), grain size and porosity are observed as known from conventional measurements. At small testing loads of 25-50 mN, the Vickers hardness of dense sub-mum corundum ceramics rises to 25-30 GPa depending on the microstructure. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：172 / 181

页数：10

共 21 条

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[2]

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