Formation of bulk β–FeSi2by annealing rapidly solidified α–FeSi2ribbons

Solidification of FeSi2alloy by single-roller rapid solidification technology was studied, and monophase α–FeSi2ribbons were obtained. Phase evolution of the monophase and metastable α–FeSi2ribbons during subsequent annealing was studied within situelectric resistance measurements. The results show that the metastable α–FeSi2phase transforms into the β–FeSi2phase at about 620 °C and then transforms into the α–FeSi2phase again at a higher temperature when heated. A new relatively simple method to prepare bulk β–FeSi2alloy, that is, formation of bulk β–FeSi2alloy by annealing monophase α–FeSi2alloy, is presented.