Design of irradiation-resistant SiC fiber–reinforced SiC matrix composites for nuclear applications

Abstract

Because of their inherent advantages—high-temperature resistance, chemical inertness, and low neutron absorption, SiC fiber–reinforced SiC matrix composites continue to gain attention in the development of advanced nuclear fission and fusion energy systems. Resistance to neutron irradiation ranks high among the material property requirements for proposed nuclear applications. This chapter describes approaches to designing radiation-resistant SiC-based composites based on radiation damage processes at multiple length scales in SiC ceramics with different microstructures. The primary focus is on the effects of irradiation on dimensional stability and mechanical properties. This guidance should aid in designing composites for specific material property requirements and developing R&D plans to overcome remaining technological challenges.