|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fracture Properties and Residual Stresses in Small Dimensions
||In Situ Stable Crack Growth at the Micron Scale
||Giorgio Sernicola, Tommaso Giovannini, Punit Patel, James Kermode, Daniel Balint, T Ben Britton, Finn Giuliani
|On-Site Speaker (Planned)
Grain boundaries typically dominate the mechanical properties of ceramics. Therefore, measuring the properties of individual grain boundaries is useful if we want to promote mechanistically informed grain boundary engineering in ceramic processing. Extracting properties of individual boundaries is very difficult in conventional testing, as a large scale fracture experiment tests many grain boundaries and convolute microstructure, crack path and performance. Therefore, we have developed an in situ technique using micro double cantilever beam and direct measurements of stable crack growth to measure the surface energy of SiC and the fracture energy of a glassy interface in a SiC bicrystal. Our measurements of the surface energy are correlated to new DFT calculations of the same interface and match well.