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采用XRD、DSC研究了深冷预处理对Fe_(67.5)Ni_1Al_5Ga_2P_(9.65)C_(6.75)B_(4.6)Si_3Sn_(0.5)铁基非晶合结构和晶化过程的影响。结果发现:经深冷预处理,铁基非晶合金内部中程有序的原子结构发生改变;晶化退火处理之后,样品晶粒的平均尺寸增大,晶化面积减少;晶化样品的T_g、T_x及T_p增大,混合焓ΔH减小。研究表明:深冷预处理能抑制非晶合金在晶化过程中的形核,降低非晶合金的形核率;晶化后热稳定性提高。
The effect of cryogenic pretreatment on the Fe-based amorphous structure and the crystallization process of Fe_ (67.5) Ni_1Al_5Ga_2P_ (9.65) C_ (6.75) B_ (4.6) Si_3Sn_ (0.5) The results showed that: after cryogenic pretreatment, the internal atomic order structure of the Fe-based amorphous alloy changed. After the crystallization annealing, the average size of the grains increased and the crystallization area decreased. The T_g , T_x and T_p increase, and the enthalpy of mixing ΔH decreases. The results show that: cryogenic pretreatment can inhibit the nucleation of amorphous alloy in the crystallization process, reducing the nucleation rate of amorphous alloy; thermal stability after crystallization.