Cu60Zr30Ti10非晶合金弛豫和晶化过程的小角X射线散射研究

应用小角X射线散射技术研究了Cu₆₀Zr₃₀Ti₁₀非晶合金从300到813 K之间微结构的演化情况.发现在淬火状态下Cu₆₀Zr₃₀Ti₁₀非晶合金中存在直径30 nm左右的富Cu区.非晶的结构弛豫包括573 K之前的低温结构弛豫和573 K到玻璃转变温度的高温结构弛豫，弛豫的结果是产生含有有序原子团簇的富Cu区，这些有序原子团簇的富Cu区是随后晶化过程中晶核产生的基础.Porod曲线分析表明，晶化生成的纳米体心立方CuZr相和基体之间有明锐的界面.关键词：小角X射线散射非晶合金结构弛豫晶化

Small angle X-ray scattering research of the relaxation and crystallization process in Cu60Zr30Ti10 amorphous alloy

Small angle X-ray scattering technique was used to investigate the evolution of microstructure in Cu₆₀Zr₃₀Ti₁₀ amorphous alloy heated at temperatures from 300 to 813 K. It is confirmed that the Cu-rich domains in the diameter range about 30 nm exist in the as-quenched state. The structural relaxation can be divided into the low temperature structure relaxation in the temperature range from 300 to 573 K and the high temperature structure relaxation in the temperature range from 573 K to the temperature of glass transition. The Cu-rich domains with ordered clusters are the basis of crystallization. Porod curves indicate that there is a sharp boundary between the nano body-centred-cubic CuZr precipitates and the matrix.