Annealing of silicon-iron ribbons containing around 6.5 wt% silicon

The magnetic properties and the grain structure of 6.6Si.93.4Fe ribbons made by a rapid quenching roll method were measured after annealing the ribbons at about 1180°C for 60 minutes under pressures ranging from 5×10-1to 1.5×10-3Torr. By annealing the ribbon under the pressure of 3 × 10-1Torr the ribbon had highly oriented