摘要
Silicon carbide(SiC)fiber possesses low neutron capture cross-section,low induced radioactivity,high thermal stability,low density,high specific strength,good oxidation-ablation resistance,high specific modulus,especially improved flaw tolerance and non-catastrophic mode of failure.Therefore,silicon carbide fiber is considered as a candidate structural component in advanced nuclear industry fields.The irradiation damage which silicon carbide fiber will be subject to is inevitable.For structural components in fast breed reactors or in fusion reactors,the energy of PKAs(primary knocked-on atoms)produced by high-energy neutron irradiation can be several hundred keV,therefore effects of energy deposition via electronic processes(excitation and ionization)by PKAs in materials cannot be ignored.In situations of fuel cladding,materials may surfer from irradiation by fission fragments(which are heavy ions with up to hundreds of MeV).It is therefore necessary to know effects of energetic heavy-ion irradiation in silicon carbide for nuclear application.
