Cu-Zn-Al合金中类液振荡的非线性机理  

THE NONLINEAR MECHANISM OF THE FLUID-LIKE FLUCTUATION IN THE Cu-Zn-Al ALLOY

作　　者：杨新娥[1] 高后秀[2] 李京生[1] 郑俊娟[1] 杨渝钦[3] 

机构地区：[1]天津大学理学院应用物理系,天津300072 [2]天津大学材料科学与工程学院,天津300072 [3]天津大学电子工程学院,天津300072

出　　处：《物理学报》2001年第7期1346-1349,共4页Acta Physica Sinica

基　　金：国家攀登计划基础研究基金! (批准号 :1999 444 );国家教育部科学基金资助&&

摘　　要：讨论了在Cu Zn Al合金表面观察到的非线性振荡现象 .观测和计算表明 ,这些微米量级的原子胞体的类液振荡具有孤波运动特征 ,当外部激振较强时 ,其振荡可维持相当长的时间 ;如果内耗较强 ,原子波胞的振幅按照函数e-kt规律随时间衰减 .理论计算与实验符合较好 .The fluctuation patterns observed in the Cu-Zn-Al alloy are reported and calculated by using a nonlinear approach in this paper. The results show that the fluid-like oscillations of the atom-cells of mum order have exhibited the feature of solitary waves. The oscillation can be maintained by the external driving,and as the internal friction becomes strong,the decay of the amplitude of solitary wave with respect to the time obeys the exponential mle exp ( - kt). The calculation is in good agreement with the experimental observations.

关 键 词：CU-ZN-AL合金 类液振荡 孤波 非线性机理 

分 类 号：TG131[一般工业技术—材料科学与工程]