Cu_(60)Zr_(30)Ti_(10)非晶合金弛豫和晶化过程的小角X射线散射研究  

Small angle X-ray scattering research of the relaxation and crystallization process in Cu_(60)Zr_(30)Ti_(10) amorphous alloy

作　　者：程伟东[1] 孙民华[1] 李佳云[1] 王爱屏[1] 孙永丽[1] 刘芳[1] 刘雄军[2] 

机构地区：[1]哈尔滨师范大学物理系,哈尔滨150025 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《物理学报》2006年第12期6673-6676,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50301013;10374087)资助的课题.~~

摘　　要：应用小角X射线散射技术研究了Cu60Zr30Ti10非晶合金从300到813K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30nm左右的富Cu区.非晶的结构弛豫包括573K之前的低温结构弛豫和573K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.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.

关 键 词：小角X射线散射 非晶合金 结构弛豫 晶化 

分 类 号：O482[理学—固体物理]