Thermal stability,crystallization behavior,Vickers hardness and magnetic properties of Fe-Co-Ni-Cr-Mo-C-B-Y bulk metallic glasses  

Fe-Co-Ni-Cr-Mo-C-B-Y系大块金属玻璃的热稳定性、晶化行为、维氏硬度和磁性能(英文)

作　　者：韩佳甲[1] 王翠萍[1] 寇生中[2] 刘兴军[1] 

机构地区：[1]厦门大学材料学院材料科学与工程系,厦门361005 [2]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第1期148-155,共8页中国有色金属学报（英文版）

基　　金：Project(2012CB825700) supported by the National Basic Research Program of China

摘　　要：Thermal stability,crystallization behavior,Vickers hardness and magnetic properties of the Fe41Co7-xNixCr15Mo14C15B6Y2（x=0,1,3,5） bulk metallic glasses were investigated.The Fe41Co7-xNixCr15Mo14C15B6Y2（x=0,1,3,5） metallic glasses were fabricated by copper mold casting method.The thermal stability and crystallization behavior of the metallic glass rods were investigated by differential scanning calorimetry and isothermal experiments.Hardness measurements for samples annealed at different temperatures for different time were carried out at room temperature by the Vickers hardness tester,and magnetic measurements were performed at different temperatures by the vibrating sample magnetometer.It is shown that the addition of Ni does not play a positive role for enlarging ΔTx and GFA from parameter γ（=Tx/（Tg＋Tl））,and it can,however,increase the activation energy in the initial stage of crystallization by changing the initial crystallization behavior.The minor addition of Ni can refine the crystal grain obtained from the full crystallization experiment.The primary crystallization causes the decrease of hardness in these alloys,and as the crystallization continues,the hardness in all samples increases instead due to the precipitation of carbide and boride.The annealing temperature has an obvious effect on magnetic properties of these alloys,and the minor addition of Ni can effectively prevent the alloy annealed at high temperature to transform from paramagnetic to ferromagnetic state.研究Fe41Co7-xNixCr15Mo14C15B6Y2(x=0,1,3,5)大块金属玻璃的热稳定性、晶化行为、维氏硬度和磁性能。通过铜模铸造法制备Fe41Co7-xNixCr15Mo14C15B6Y2(x=0,1,3,5)大块金属玻璃。利用差示扫描量热法和等温热处理法研究这些金属玻璃的热稳定性和晶化行为。在室温下利用维氏硬度计测量试样经过不同温度和时间退火后的硬度,并对它们的磁学性质进行表征。实验结果表明,少量Ni元素的加入没有增大过冷液相区间和玻璃形成能力,但是改变合金的初始晶化行为,增大晶化激活能。少量Ni元素的加入能够细化最终晶化组织中的晶粒大小。初晶相使合金的硬度降低,但随着热处理温度的升高,所有合金的硬度都明显提高,原因是析出了大量的碳化物和硼化物。退火温度对合金的磁性能有很大影响,少量Ni元素的加入阻止了合金在高温退火后从顺磁态向铁磁态的转变。

关 键 词：Fe-Co-Ni-Cr-C-B-Y metallic glass thermal stability annealing magnetic properties 

分 类 号：TG139.8[一般工业技术—材料科学与工程]