Title
Analyzing indentation behavior of LaGaO3 single crystals using sharp indenters
Abbreviated Journal Title
J. Eur. Ceram. Soc.
Keywords
perovskites; hardness; mechanical properties; toughness; indentation; LaGaO3; DOPED LANTHANUM GALLATE; HIGH-TEMPERATURE; PLASTIC-DEFORMATION; CHOKHRALSKII METHOD; REAL STRUCTURE; CUBE-CORNER; FRACTURE; OXIDE; EVOLUTION; HARDNESS; Materials Science, Ceramics
Abstract
In this work, the mechanical properties of (1 0 0) and (0 0 1) oriented LaGaO3 single crystals have been studied using sharp indenters. Vickers hardness values for both the (1 0 0) and (0 0 1) samples were found to be in the same range (similar to 8 GPa). The values for the indentation fracture toughness (KR) from Vickers indentation on the (1 0 0) samples were determined to be 0.8 +/- 0.2 MPa m(1/2). Different crack lengths, implying a strong anisotropy in the indentation fracture toughness values, were observed in the two mutually perpendicular directions in the indentations on the (0 0 1) samples. These measurements led to estimates of 0.5 +/- 0.1 and 1.3 +/- 0.3 MPa m(1/2) for the two different sets of cracks on the (0 0 1) samples. In situ nanoindentation inside the SEM using a cube-corner indenter has also been used for studying the indentation fracture response of these samples. (c) 2008 Elsevier Ltd. All rights reserved.
Journal Title
Journal of the European Ceramic Society
Volume
28
Issue/Number
10
Publication Date
1-1-2008
Document Type
Article
Language
English
First Page
2039
Last Page
2047
WOS Identifier
ISSN
0955-2219
Recommended Citation
"Analyzing indentation behavior of LaGaO3 single crystals using sharp indenters" (2008). Faculty Bibliography 2000s. 820.
https://stars.library.ucf.edu/facultybib2000/820
Comments
Authors: contact us about adding a copy of your work at STARS@ucf.edu