LAUSR

Abstract The B2 structure based MIL composites was fabricated by a two-step processing: the stacked Al and Fe foils were firstly hot pressed under eutectic reaction to form the Al-rich intermetallic phase(Fe2Al5) layer by consuming all the Al foils. And then, for forming the Fe-rich intermetallic phase (FeAl with B2 structure), three kinds of experiments were carried out to transfer the Al-rich phase layer to B2 structure: annealing at eutectic temperature for a long time; hot pressing or Spark plasma sintering (SPS) at higher temperature (1000 °C). The EDS, EBSD, XRD, micro-hardness tests and quasi-static compression are applied to study microstructure evolution, phase transformation and identification during fabricating the B2 structure based MIL composites. Mechanical properties of the B2 structure based MIL composites has proved the reduction of the stress concentration on the interface.