Introduction to Materials - Sample Preparation Topic for Transmission Electron Microscopy - page 22

Fig. 2.10 Drawing of a 53 ◦
grain boundary orientation
along the [001] direction

Fig. 2.11 Two-dimensional
crystal defects: grain
boundaries with different
structures of the boundary
plane

Symmetric Asymmetric Faceted

Fig. 2.12 Two-dimensional crystal defects: coherent and semi-coherent interfaces

or incoherent with those of the matrix. The accumulation of vacancies can form an
intragranular or intergranular cavity.
The mechanical properties of a composite material require good mechanical
resistance of the fiber-matrix interfaces under the effects of a load, i.e., during its
aging and at high temperatures, which corresponds to the application conditions.
Studies on the mechanical behavior of a fiber (e.g., starting with measurements of
resistance to rupture) demonstrates that this behavior is directly tied to the behavior
of the interfaces found in the composite material. The study of the microstructure