In recent years Ceramic Matrix Composites(CMCs)have attracted the attention of material researchers for applications such as highly heat stressed components for combustion engines and in aero engines,not because fibre reinforcement of the ceramic enhances intrinsic strength values,but to change their brittle failure behaviour to a quasi-ductile stepwise failure by restricting crack propagation.Currently,such CMCs can be produced by infiltration but this is not considered to be an economic approach for large-scale production,and progress in adopting CMCs for highly-stressed applications has,therefore,been limited.
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