Fe77Co2Zr9B10Cu2合金的制备及其磁性能

采用单辊快淬法制备了Fe77Co2Zr9B10Cu2合金,在530～750℃等温退火40 min,利用X射线衍射和振动样品磁强计研究了Fe77 Co2 Zr9 B10 Cu2合金的微观结构和磁性能。结果表明:淬态Fe77Co2Zr9B10Cu2合金为非晶、纳米晶双相结构。随着退火温度的升高,α-Fe晶体相从非晶、基体中析出,晶粒尺寸长大,晶化体积分数增加,矫顽力先减小后增大,比饱和磁化强度逐渐增大。实验结果表明,530℃退火后合金的矫顽力最小,在670℃时迅速增大。样品的磁性与其微观结构、晶粒尺寸、晶化体积分数等因素有关.

Preparation and Magnetic Properties of Fe77 Co2 Zr9 B10 Cu2 Alloy

Fe77 Co2 Zr9 B10 Cu2 alloy ribbons were prepared by single-roller melt spinning method. After being annealed at 530-750 ℃ for 40 min, their microstructure and magnetic properties at elevated temperatures were investigated. The results show that with the increase of the annealing temperature, α-Fe crystal phase precipitates from amorphous matrix, the grain size increases, the volume fraetion of α-Fe crystal phase increases, special saturation magnetization increases gradually, while coereivity decreases tardily at first and then increases. It is found out that the coereivity increases rapidly at 670 ℃, while being the smallest annealed at 530 ℃. The magnetic properties of Fe77 Co2Zr9B10Cu2 alloy are related with its microstructure, grain size, volume fraction of crystal phase and other factors.