Hyperfine interactions in solid state reaction of hematite with aluminium

The solid state reaction of hematite with aluminium has been induced by mec hanical alloying. Mossbauer spectroscopy and X-ray diffraction have been us ed to investigate the reaction products. The reaction was completed in a ti me longer than 15 min but shorter than 30 min. During the reaction a Fe(Al) bcc solid solution was obtained as a matrix, with Al2O3 as reinforcement. After prolonged milling both components were in a nanocrystalline paramagne tic state.