用旋转水中熔融金属纺丝法制备了Ｆｅ－Ｓｉ－Ｂ非晶金属丝。拉伸和弯折性能表明，当合金中杂质碳原子分数含量≥０．２％时，制备态（淬态）非晶丝发生脆化。电子探针、Ａｕｇｅｒ能谱分析与透射电镜观察发现，非晶丝表面具有大约１５０－３００ｎｍ宽的富碳层且包含Ｆｅ＿（２３）（Ｃ，Ｂ）＿６相。该相是Ｆｅ－Ｓｉ－Ｂ非晶丝脆化的原因。
Fe-Si-B amorphous alloy wires were prepared by the melt spinning in rotating water and the tensile and bending properties of as-cast wires were maesured. Minor carbon, makes the wires embrittle. The enrichment of carbon and the precipatation Fe_(23) (C,B),_6 phases in the surface layer of wires were observed by SEM, TEM and SAM.It seems that Fe_(23) (C, B)_6 induced the embrittlement of as-cast amorphous wires.
参考文献
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| [4] | GerlingR,SchimanskyFP,WagnerR．ActaMetall,1988 |
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