TIME-RESOLVED X-RAY-SCATTERING STUDY OF ORDERING KINETICS IN BULK SINGLE-CRYSTAL CU3AU

被引：54

作者：

SHANNON, RF ^{[1
]}

NAGLER, SE ^{[1
]}

HARKLESS, CR ^{[1
]}

NICKLOW, RM ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.46.40

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Time-resolved x-ray scattering has been used to study ordering kinetics in single-crystal bulk Cu3Au. After annealing at high temperatures, the sample is rapidly quenched to fixed temperatures below the order-disorder transition temperature. The development of order is monitored in real time with use of scattering techniques. The data clearly showed three regimes: nucleation, ordering, and coarsening. The anisotropic superlattice peaks that reflect the domains structure are investigated in connection with the ordering kinetics. The line shape of the scattering function exhibits a crossover from a Gaussian to a Lorentzian squared as the system goes from the ordering regime to the coarsening regime. The line shape of S(Q) is analyzed by fitting the data with a variety of functions. The resolution is accounted for during the fitting. The coarsening in Cu3Au is consistent with curvature-driven growth.

引用

页码：40 / 54

页数：15

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