Analyzing indentation behavior of LaGaO3 single crystals using sharp indenters
Abbreviated Journal Title
J. Eur. Ceram. Soc.
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
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 of the European Ceramic Society
"Analyzing indentation behavior of LaGaO3 single crystals using sharp indenters" (2008). Faculty Bibliography 2000s. 820.