ICOSAHEDRAL PHASE FORMATION IN TI68-XCR32SIX ALLOYS

被引：34

作者：

ZHANG, X

KELTON, KF

机构：

[1] Department of Physics, Washington University, St. Louis, Missouri

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1990年 / 62卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1080/09500839008215133

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report, for the first time, the formation of the icosahedral phase (i-phase) in rapidly quenched Ti68-xCr32Sixalloys, where 6≤x≤ 18. The i-phase occurs at a composition for which there áre no structurally similar crystalline phases. Transmission electron microscopy (TEM) and X-ray diffraction measurements are presented. The TEM diffraction patterns show strong localized diffuse scattering and spot anisotropy. These features are compared with similar ones found in Al83Cr17and Ti61Mn37Si2icosahedral phases. No evidence for an enthalpic signature of phase transformation was found upon heating to the melting temperature, indicating that the i-phase is at least strongly metastable. The first estimates of the density are reported. © 1991 Taylor & Francis Group, LLC.

引用

页码：265 / 271

页数：7

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