Fe-B-Nb-Er块状非晶合金的形成能力及热稳定性研究  

Thermal stability and bulk glass forming ability of Fe-B-Nb-Er bulk metallic glass

作　　者：耿岩[1,2] 苏亚坤[1] 张海峰[2] 祁阳[1] 

机构地区：[1]东北大学理学院,沈阳110819 [2]中科院金属研究所,沈阳110016

出　　处：《材料与冶金学报》2013年第4期275-279,共5页Journal of Materials and Metallurgy

基　　金：东北大学基础科研资助项目(N110605004)

摘　　要：采用工业原料通过铜模喷铸法制备了(Fe7.2B24Nb4)100-x Er x(x=3.0、4.0、4.5、5.0、6.0、7.0)块状非晶合金系,采用X射线衍射仪、DSC差示热量扫描仪研究了稀土元素Er对该非晶合金系热稳定性、玻璃形成能力的影响.结果表明:稀土元素Er的添加明显提高了样品的非晶形成能力,Er含量(摩尔分数)为5.0%时成功制备出直径为5 mm的(Fe72B24Nb4)95Er5块状非晶,该非晶合金具有较高的热稳定性,抗晶化能力较强,其晶化激活能分别达到382.8、539.5、680.8 kJ/mol.( Fe72 B24 Nb4)100-x Erx( x = 3.0、4.0、4.5、5.0、6.0、7.0) system bulk amorphous alloys were produced by using the raw materials of industrial grade purity through copper mould casting.X-ray diffractometer ( XRD) ,differential scanning calorimetry ( DSC ) were employed to characterize the glass forming ability,thermal stability of the amorphous alloys .The experimental results showed that the glass forming ability of the Fe-B-Nb-Er system amorphous alloys was improved by increasing content of the rare earth element Er ; A sample of 5 mm was obtained when mole fraction of Er was 5.0%.The thermal stabilities of Fe-B-Nb-Er system amorphous alloy was high.The activation energies of the amorphous alloys were 382.8 kJ/mol、539.5 kJ/mol、680.8 kJ/mol respectively.

关 键 词：块状非晶合金 玻璃形成能力 热稳定性 

分 类 号：TG139.8[一般工业技术—材料科学与工程]