非晶态Fe－B－Si合金的退火脆化

ANNEALING EMBRITTLEMENT OF AMORPHOUS Fe-B-Si ALLOYS

非晶态Ｆｅ－Ｂ－Ｓｉ合金的退火脆化具有明显的成分依赖性，并且对制备条件和退火方式比较敏感；近共晶成分的合金（如Ｆｅ８０Ｂ１１．５Ｓｉ８．５和Ｆｅ７９Ｂ１１．５Ｓｉ９．５等）和适当液淬工艺条件下制备的非晶合金薄带具有相对较小的脆化倾向。与常规退火工艺相比，脉冲电流加热快速退火，可在保持延性基本不变的情况下，明显改善合金的磁性；

Annealing embrittlement of the amorphous Fe-B-Si alloys is strongly dependent on their composition and is relatively susceptible to melt-quenching condition and annealing treatment. Alloys composed near the eutectic range, such as amorphous Fe80B11.5Si8.5 and Fe79B11.5Si9.5 alloys, and the ultra-thin ribbons made from suitable melt-spun technique are slightly tending to annealing embrittlement. Compared to conventional annealing regime,rapid annealing by pulse-current heating can obviously improve the magnetic properties of as-quenched alloys with holding the ductility. It is a hopeful practical method to obtain an optimum ductile and superior magnetic properties of amorphous Fe-B-Si alloy.