PHONON-DISPERSION OF THE BCC PHASE OF GROUP-IV METALS .1. BCC TITANIUM

被引：270

作者：

PETRY, W

HEIMING, A

TRAMPENAU, J

ALBA, M

HERZIG, C

SCHOBER, HR

VOGL, G

机构：

[1] FREE UNIV BERLIN, FACHBEREICH PHYS, W-1000 BERLIN 33, GERMANY

[2] UNIV MUNSTER, INST MET, W-4400 MUNSTER, GERMANY

[3] FORSCHUNGSZENTRUM JULICH, INST FESTKORPERFORSCH, W-5170 JULICH 1, GERMANY

[4] UNIV VIENNA, INST FESTKORPERFORSCH, A-1090 VIENNA, AUSTRIA

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.43.10933

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phonon dispersion has been measured on in situ-grown bcc titanium at 1020-degrees-C. A band of low-frequency and strongly damped phonons extending along the Brillouin surface from T[110BAR] 1/2(1,1,0) to L 2/3(1,1,1) is found. These strongly anharmonic phonons have been measured at various temperatures between the bcc-to-hcp transition temperature and the melting point. Geometrical considerations show how these large-amplitude lattice vibrations are related to the displacements which are necessary for the two martensitic phase transitions from bcc to omega (under pressure) and from bcc to hcp (upon lowering the temperature).

引用

页码：10933 / 10947

页数：15

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