Nb对铁基非晶合金的晶化影响  

Effects of Nb Addition on Fe-based Amorphous Alloys Crystallization

作　　者：傅明喜[1] 甘俊旗[2] 张纪波[2] 卢永慧[1] 高英俊[2] 赵江[1] 周宏军[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]广西大学物理科学与工程学院,广西南宁530004

出　　处：《金属功能材料》2007年第2期5-9,共5页Metallic Functional Materials

基　　金：江苏省教育厅高校科学研究项目(03KJD430067)

摘　　要：利用X射线衍射(XRD)和差热分析(DSC)方法试验研究了Nb元素对Fe-(Al,Ga)-(P,C,Si,B)系合金非晶晶化的影响。结果表明:Fe73Nb1Al4Ga2P12B4Si4的晶化过程为α-Fe→α-Fe+Fe5SiP+Al0.7Fe3Si0.3+Fe3B+剩余非晶化相;替代元素Nb的加入提高了材料的晶化温度,改变了Fe74Al4Ga2P12B4Si4的晶化激活能,其中形核激活能(Eg)、晶化起始激活能(Ex)和第一晶化峰激活能(Ep1)都大大增加;另外,Nb的加入还使合金晶化后的晶粒尺寸大大减小。The effects of Nb addition on Fe73Nb1Al4Ga2P1284Si4 amorphous alloys crystallization were investigated by the way of XRD, DSC and SEM. The results show that the crystallization progresses of Fe73Nb1Al4Ga2P1284Si4 were α-Fe→α-Fe＋Fe5SiP＋Al0.7Fe3Si0.3＋Fe3B＋remained noncrystallization phase. The amorphous alloys crystallization temperature increased and activation energy of Fe73Nb1Al4Ga2P1284Si4 was changed by the addition of substitute elements Nb. Nucleation formation activation energy（Eg）seed-medlated growth activation energy （Ex）and crystallization peak activation energy （Ep1）of amorphous alloy all increased, and the size of grains decreased sharply when Nb was added in alloys.

关 键 词：非晶合金 非晶晶化 激活能 热稳定性 

分 类 号：TG139.8[一般工业技术—材料科学与工程]