微量Co、Sn在Fe基非晶合金制备中的作用  

Effects of Trace Co and Sn on Formation Ability of Fe-based Amorphous Alloy

作　　者：傅明喜[1] 王芳芳[1] 赵江[1] 周宏军[1] 许巨晶[1] 

机构地区：[1]江苏大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第6期411-413,共3页Special Casting & Nonferrous Alloys

基　　金：江苏省教育厅高校科学研究项目(03KJD430067)

摘　　要：采用铜模喷铸法制备了Fe(64-x-y)Ni1Al5Ga2P9.65B9.6Si3C5.75SnxCoy(x=0,0.5,1.0,y=0,0.5,1.0,1.5,2.5,3.5)系非晶合金,用XRD、DSC研究了合金玻璃形成能力。结果表明,单一地加入元素Co或Sn并不能提高合金FeNiAlGaPBSiC的玻璃形成能力(GFA);但同时加入Co、Sn会影响合金的GFA:0.5%的Co和0.5%的Sn能有效改善合金的GFA,随着Co含量继续增加,合金的GFA明显提高;但Co含量大于1.5%、Sn大于0.5%时合金的GFA会减小。添加1.5%的Co和0.5%的Sn时合金的玻璃形成能力最大,其玻璃转变温度(Tg)、晶化温度(Tx)、过冷液相区宽度ΔTx、玻璃形成能力判据γ分别为696.3K,782.1K,85.8K和0.413。Fe(64-x-y)Ni1Al5Ga2P9.65B9.6Si3C5.75SnxCoy(x=0,0.5,1.0;y=0,0.5,1,1.5,2.5,3.5)amorphous alloys have been prepared by water cooled copper mold,and the glass forming ability(GFA)of the amorphous alloy was examined by XRD and DSC.The results indicate that although the GFA of the amorphous alloy can not be improved with alone adding Co or Sn,it can be improved by adding 0.5% Co and 0.5% Sn(in atom percentage).Furthermore,although the GFA of the amorphous alloy can be further increased with the increase of Co and Sn addition,however,it will be weakened with adding Co content more than 1.5% and Sn content more than 0.5%.The desirable GFA of the amorphous alloy can be obtained with 1.5% Co addition and 0.5% Sn addition,in which the glass transition temperature(Tg),the crystallization temperature(Tx),the under-cooled liquid region(△Tx)and the value of GFA parameters are 696.3 K,782.1 K,85.8 K and 0.413,respectively.

关 键 词：铁基非晶合金 玻璃形成能力 混合焓 混合熵 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG125.212[金属学及工艺—合金]