Ti对Cu基块体非晶合金的玻璃转变动力学影响

The Effect of Glass forming Ability in Cu-based Bulk Amorphous Alloy adding Ti

本文选用非晶形成能力高,且在玻璃转变区和过冷液相区有高热稳定性的Cu46Zr47-xAl7Tix(x=0,1.5)块体非晶合金为研究对象。利用X射线衍射分析和差示扫描量热分析(DSC),研究了Ti元素的添加对于Cu基非晶合金玻璃转变动力学的影响。研究结果表明,在Cu46Zr47Al7块体非晶合金中用1.5%的Ti替代Zr之后,利用VFT方程分析得知合金的强度指数D由2.54增大到3.78,脆性指数m也从39减小到34,表现出了更高的玻璃形成能力。

In this dissertation, Cu-based bulk amorphous alloys Cu46Zr47-xAl7Tix（x=0,1.5）, which exhibit good glass forming ability （GFA） and high thermal stability against crystallization at glass transition as well as in supercooled liquid region, have been chosen to be the model materials to study. By the X-ray diffraction and differential scanning calorimetry analysis,that researched the effect of glass forming ability in Cu-based bulk amorphous alloy adding Ti. The results showed that： it is found that the fragility parameter M decreases from 39 to 34, simultaneously the strength parameter D increases from 2.54 to 3.78 using the Vogel-Fulcher-Tamman （VFT） equation, Cun6ZraTA17 amorphous alloy exhibits stronger glass forming ability when 1.5% Ti element had been added.