Biomedical Engineering Reference
In-Depth Information
5.8 Atomistic microstructures analyzed for crack propagation.
sized cylindrical inclusion; M4 is based on M1 with 6 nm sized cylindrical
inclusion; M5 is based on M2 with 3 nm sized cylindrical inclusion; M6 is
based on M2 with 6 nm sized cylindrical inclusion. Because of the imposition
of PBCs, microstructures M3 to M6 represent composites with second-phase
SiC inclusions arranged periodically. Figure 5.8 also shows crack lengths in
the analyzed nanocomposites.
The structures shown in Fig. 5.8 are three-dimensional. The structures
were formed by placing SiC cylindrical particles in Si
3
N
4
blocks with holes.
Setting up of the SiC-Si
3
N
4
interface in the structures can critically affect
the internal stresses. In order to relieve any artificial internal stresses, first
Si
3
N
4
blocks with holes were prepared and equilibrated without the presence
of the corresponding SiC cylindrical particles. SiC particles that are to be
inserted in the Si
3
N
4
holes were separately equilibrated as clusters. After
equilibration, the Si
3
N
4
block and the corresponding SiC particle were put
