用水冷铜模吸铸方法制备了最大截面直径为2 mm的Y6Fe60.5Co11.5B22铁基大块非晶合金,研究了冷却速率对合金磁性能的影响,分析并计算了合金的临界冷却速率.大块Y6Fe60.5Co11.5B22非晶合金具有良好的软磁性能:其矫顽力Hc=2.53 A/m,饱和磁化强度Ms=1.24 T,初始磁化率明显高于相同成分的晶态合金.热稳定性分析表明,该合金具有较高的非晶形成能力,其形成非晶的临界冷却速率(Rc)约为119 K/s.
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