脉冲磁场对铁基非晶合金结构及晶化动力学的影响  

Effect of Pulsed Magnetic Field on Structure and Crystallization Kinetics of Iron-based Amorphous Alloys

作　　者：魏思海 傅明喜[1] 邹吉炜 WEI Sihai;FU Mingxi;ZOU Jiwei(College of Materials Science and Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《热加工工艺》2022年第24期6-9,13,共5页Hot Working Technology

基　　金：江苏省教育厅高校科学研究项目(03KJD430067)。

摘　　要：利用XRD和DSC方法研究磁脉冲处理对Fe_(64)Ni_(1)Al_(4.5)Cu_(0.5)Ga_(2)P_(9.65)B_(9.6)Si_(3)C_(5.75)非晶结构和晶化动力学的影响。XRD结果表明:与淬态试样相比,脉冲磁场处理后试样的峰形更加起伏,内部开始有原子团簇的形成,但其结构仍保持非晶态。DSC结果反映,脉冲磁场处理后试样的Tx和Tp较淬态试样有不同程度的降低,并伴随着脉冲次数的增加均呈降低趋势。利用Ozawa方程计算出各组试样的晶化激活能,结果显示脉冲磁场处理有利于提高非晶稳定性。通过JMA模型计算出各组试样晶化过程中的m_(x)和m_(p),数据分析显示随着脉冲次数的增加两者均呈增大趋势,表明脉冲磁场处理能够提高晶化反应速率。The effects of magnetic pulse treatment on the amorphous structure and crystallization kinetics of Fe_(64)Ni_(1)Al_(4.5)Cu_(0.5)Ga_(2)P_(9.65)B_(9.6)Si_(3)C_(5.75) are studied by XRD and DSC.The XRD results show that the peak shape of the amorphous sample treated by pulsed magnetic field is more undulated than that of the as-quenched sample,and the atomic clusters are formed inside the sample.However,it remains amorphous structure.The DSC results show the Txand Tpof the sample treated by pulsed magnetic field are lower than that of the quenched sample.With the increase of the number of pulses,they are all decreased.In addition,the crystallization activation energy of the sample is calculated by the Ozawa method,and it is shown that the pulse magnetic field treatment is beneficial to the enhancement of the amorphous stability.The m_(x)and m_(p)in the crystallization process of each group of samples are calculated by the JMA model.The results show that with the increase of the number of pulses,they both show an increasing trend,indicating that the pulsed magnetic field treatment can increase the rate of crystallization reaction.

关 键 词：铁基非晶合金 脉冲磁场 XRD和DSC 晶化动力学 晶化激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]