LATTICE-DYNAMICAL STUDY OF THE PREMARTENSITIC STATE OF THE CU-AL-BE ALLOYS

被引：32

作者：

MANOSA, L ^{[1
]}

ZARESTKY, J ^{[1
]}

LOGRASSO, T ^{[1
]}

DELANEY, DW ^{[1
]}

STASSIS, C ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.48.15708

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron-scattering techniques have been used to study the premartensitic state of a family of Cu-Al-Be alloys, which transform from the bec phase to an 18R martensitic structure. We find that the phonon modes of the TA2[110] branch have very low energies with anomalous temperature dependence. A slight anomaly at q = 2/3 was observed; this anomaly, however, does not change significantly with temperature. No elastic peaks, related to the martensite structure, were found in the premartensitic state of these alloys. The results are compared with measurements, performed under the same instrumental conditions, on two Cu-Al-Ni and a Cu-Zn-Al martensitic alloy.

引用

页码：15708 / 15711

页数：4

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