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- Title
Onset Plastic Deformation and Cracking Behavior of Silicon Carbide under Contact Load at Room Temperature.
- Authors
Zhao, Xiaofeng; Langford, Richard M.; Shapiro, Ian P.; Xiao, Ping; Pharr, G.
- Abstract
The room temperature onset plastic deformation and crack behavior of 3C-SiC under contact load were investigated using nanoindentation and transmission electron microscopy ( TEM). During loading, abrupt bursts or pop-in in the load-displacement curves was observed at a depth of ~60 nm. The 3C-SiC deforms elastically before the pop-in depth, but exhibits a plastic-elastic behavior after that. TEM observations reveal that the shear slip is the predominant deformation mechanism in 3C-SiC during indentation. The cracks usually initiate at the intersection of shear bands or grain boundary. In addition, theoretical analysis confirms that the pop-in event is associated with the onset plasticity of 3C-SiC.
- Subjects
DEFORMATIONS (Mechanics); SILICON carbide; FRACTURE mechanics; TRANSMISSION electron microscopy; SHEAR (Mechanics); CRYSTAL grain boundaries; CERAMIC materials
- Publication
Journal of the American Ceramic Society, 2011, Vol 94, Issue 10, p3509
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2011.04674.x