Synthesis of Al/Fe3Al core–shell intermetallic nanoparticles by chemical liquid deposition method

In this work, an Al/Fe3Al core–shell nanoparticle was obtained by heat treatment of a precursor in high purity of argon. The precursor, with Fe(CO)5 and nano Al as raw materials, was synthesized simply by a chemical liquid deposition method. The evolution of the phase and morphology during the heat-treatment has been carefully studied by XRD and TEM. The results indicate that the precursor transformed to core–shell structure of Fe3Al intermetallic nanoparticle. The formation of the Fe3Al intermetallic nanoparticle was explored by DSC test, which reveals that the formation temperature of the nanoparticle is around 587 °C. Moreover, the TG–DSC measurements from 50 °C to 1000 °C in compressed air (20% O2 and 80% N2) reveal that the heat-treated powder of the precursor remains thermal stability in relatively low temperature but becomes concentrated combustion in elevated temperature.

Fe–Al intermetallic nanopowder was synthesized by the chemical liquid deposition method and subsequent heat-treatment in argon atmosphere. DSC test under argon atmosphere was used to reveal the forming process of Fe–Al intermetallic nanopowder and the results indicate that the forming temperature is around 587 °C. Moreover, core–shell Al/Fe3Al nanoparticles were observed and exhibited thermal stability below 400 °C and concentrated combustion at the range of 450–650 °C.Figure optionsDownload as PowerPoint slideHighlights
• Al/Fe3Al core–shell nanoparticles are prepared by the chemical liquid deposition method.
• The forming temperature of Al/Fe3Al nanopowder is around 587 °C.
• Al/Fe3Al nanopowder remains thermal stable below 400 °C and concentrated combustion at 450–650 °C.