Development of copper matrix composite reinforced with FeAl particles produced by combustion synthesis

This work focuses on the synthesis of FeAl intermetallic compound by combustion synthesis (SHS process) and its inclusion as dispersoids in a copper matrix to develop a metal matrix composite (MMC) by sintering. In the first step, FeAl compound was produced by the sintering of Fe-50 at.%Al at 1100 °C. Then, after grinding and mixing with copper powder, it was sintered in solid phase and liquid phase to obtain a metal matrix composite. The Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy (SEM and EDS-X) analysis showed that copper diffuses in the microporosity of the FeAl particles and leaves porosity in the matrix. FeAl was milled by high energy to reduce the size of particles. It was then co-milled with copper to coat its particles in order to achieve higher density. The results showed that copper coats the FeAl particles which become finer and less porous. However, a low porosity persists in the matrix after sintering.