块体非晶合金Zr55Cu30Al10Ni5 结构弛豫的研究

应用同步辐射小角x射线散射和差示扫描量热分析对块体非晶合金Zr55₅₅Cu 30₃₀Al10₁₀Ni5₅结构弛豫进行了研究.实验结果表 明：经340℃、不同时间退火后的非晶内 部的电子密度涨落随退火时间的延长先增大而后减小；玻璃转变温度附近焓弛豫峰的表观激 活能则随退火时间的延长先减小而后增大.结果反映了随退火时间的延长，块体非晶合金内 部类液体区不断减少及类固体区不断增加的过程.关键词：小角x射线散射块体非晶合金结构弛豫

Study on structure relaxation of Zr5555Cu3030Al10 10Ni55bulk amorphous alloy

The structure relaxation of Zr55₅₅Cu30₃₀Al10_{10Ni55 bulk amorphous alloy annealed at 340℃ for different times have been investigated by synchrotron radiation small angle x-ray scattering and differential scanning calorimetr y. Annealing time dependence of electronic density fluctuation in the amorphous alloy and apparent activation energies for the enthalpy relaxation were presente d and discussed. The experimental results show that electronic density fluctuati ons increase first and then decrease with increasing annealing time, while the a pparent activation energy for the enthalpy relaxation exhibits an opposite chang e, i.e., decreases first and then increases. Both indicate the transformatio n from the liquid-like region to the solid-like region in amorphous alloy duri ng annealing.}