Fe_(67-x)Nb_5B_(28)Cu_x合金的非晶形成能力、热稳定性和电阻率研究  

Glass Forming Ability,Thermal Stability and Electrical Resistivity of the Fe_(67-x)Nb_5B_(28)Cu_x Alloys

作　　者：蔡萌萌 朱满[1] 坚增运[1] 常芳娥[1] Cai Mengmeng;Zhu Man;Jian Zengyun;Chang Fang'e(School of Materials and Chemical Engineering,Xi'an Technological University)

机构地区：[1]西安工业大学材料与化工学院

出　　处：《特种铸造及有色合金》2019年第1期6-9,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51301125;51371133);陕西省教育厅重点实验室科研计划资助项目(17KS055)

摘　　要：采用单辊甩带法制备了Fe_(67-x)Nb_5B_(28)Cu_x(x=0.5、1.0、2.0,摩尔分数)非晶合金,利用X射线衍射仪(XRD)、差示扫描量热仪(DSC)和四探针测试仪研究了Cu含量对合金热稳定性和电阻率的影响。结果发现,Fe基非晶合金的晶化过程与合金中的Cu含量有关,随着Cu含量的增加,合金的非晶形成能力和热稳定性降低。Fe_(66.5)Nb_5B_(28)Cu_(0.5)合金具有大的非晶形成能力以及高热稳定性,其过冷液相区宽度和晶化起始温度分别为39和929K。Fe_(67-x)Nb_5B_(28)Cu_x非晶合金的电阻率为119～138μΩ·cm,合金电阻率随Cu含量的变化规律与非晶形成能力(GFA)一致。The Fe67-xNb5B28Cux(x=0.5,1.0,2.0)(atomic fraction,%)amorphous ribbons have been prepared successfully by melt-spinning.The influences of Cu content on thermal stability and electrical resistivity were investigated by X-ray diffractometer(XRD),differential scanning calorimetry(DSC)and four-point tester.The results indicate that the crystallization process is directly related with Cu content,where with the increase of Cu content,the glass forming ability and thermal stability are decreased in the Fe67-xNb5B28Cux alloys.The Fe66.5Nb5B28Cu0.5glassy alloy exhibits the excellent GFA and high thermal stability,in which the values of ΔTx and Tx1are equal to 39K and 929K,respectively.The electrical resistivity of the Fe67-xNb5B28Cux glassy alloys reaches 119-138μΩ·cm.The Fe67-xNb5B28Cux glassy alloys show a correspondence between electrical resistivity and GFA.

关 键 词：FE基非晶合金 非晶形成能力 热稳定性 电阻率 

分 类 号：TG139.8[一般工业技术—材料科学与工程]