Study on the microstructure of FeCrAl/aluminum bronze composite coatings prepared by supersonic electric arc-spraying

摘要

FeCrAl/aluminum bronze composite coatings were prepared by supersonic electric arc-spraying. The microstructure of the composite coating was studied by using optical microscope (OM), scanning electron microscope (SEM). The results show that the FeCrAl and QAl7 aluminum bronze composite coatings have a typical layered structure which is composed of FeCrAl, QAl7 aluminum bronze flattened particles as well as alumina films between them. FeCrAl and QAl7 aluminum bronze flattened particles are distributed alternately and have a good combination between each other.