Influence of pre-oxidation of NiAl intermetallic particles on thermal stability of Al/NiAlp composites at 500 °C

Thermal stability of PM Al/5%NiAl composites has been studied by exposure at 500 °C up to 24 h. NiAl intermetallic particles were employed as-received and after pre-oxidation at several temperatures. The optimal oxidation condition was determined based on its ability to delay interfacial reactions and prevent debonding at the metal/reinforcement interface.