Characterisation of Fe–20Cr–6Al–Y model alloy in supercritical water

摘要: AbstractMCrAlY (M = Fe, Ni or Co) alloys belong to a class of coating materials that provide corrosion and oxidation resistance Fe based substrate by forming dense alumina layer on the surface. In order assess its potential as resistant components in supercritical water cooled reactor core, Fe–22Cr–6Al–0·6Y model alloy was tested (SCW) (500°C 25 MPa) for over 6000 h. The long-term behaviour samples with various surface preparation means evaluated measuring weight change per unit area examining microstructure oxide formation using scanning electron microscopy X-ray diffraction. results showed alone led changes gain great seven times. Finely polished allowed more take place SCW, hence due Fe3O4 (and spinel) formation. Simple grinding abrasive paper yielded least most stable w...