Introduction

In this chapter, the fabrication methods of ceramic-matrix composites (CMCs), including chemical vapor infiltration (CVI), polymer infiltration and pyrolysis, and melt infiltration (MI), were introduced and the application of CMC hot-section components in aero engines was also analyzed. The mechanical properties of different CMCs, e.g., mini CVI-SiC/SiC, unidirectional MI-SiC/SiC, cross-ply MI-SiC/SiC, and 2D woven CVI-SiC/SiC, were analyzed and related with composite's internal damage mechanisms. Two typical CMC components, i.e., turbine twin guide vanes and turbine blisk, were designed and tested at high temperature. The microstructure and damage mechanisms of CMCs were analyzed using different damage monitoring methods. The mechanical behavior of first matrix cracking, multiple matrix cracking evolution, matrix crack opening, and matrix crack closure behavior in CMCs were also introduced.