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对非晶Ｆｅ７８Ｂ１３Ｓｉ９合金进行了低温等时及电脉冲加热退火处理。用高分辨率电子显微系统观察分析合金脆化前后的微观结构变化。试验结果表明，常规退火时合金的低温脆化是其淬态存在的类Ｆｅ３Ｂ原子排列短程有序区长大至３～７ｎｍ所致；电脉冲加热由于能抑制类Ｆｅ３Ｂ有序区的发展并使其“碎化”而避免脆化的发生。电脉冲加热后合金的脆化与ｂｃｃα－Ｆｅ晶粒的形核有关。
The amorphous Fe78B13Si9 alloy was subjected to low temperature isochronous and electric pulse annealing. Microstructural changes before and after embrittlement of the alloy were observed and analyzed by high resolution electron microscopy. The experimental results show that the low-temperature embrittlement of the alloy during conventional annealing is due to the quenching of Fe3B-like atoms arranged short-range orderly region up to 3 ~ 7nm due to electric pulse heating can inhibit the development of ordered Fe3B- It “shreds” to avoid embrittlement. The electrical embrittlement of the alloy after heating is related to the nucleation of bccα-Fe grains.