THE EFFECT OF TEMPERATURE ON STABILITY OF THE AL-CU-CO DECAGONAL PHASE

被引：22

作者：

HE, Y ^{[1
]}

CHEN, H ^{[1
]}

POON, SJ ^{[1
]}

SHIFLET, G ^{[1
]}

机构：

[1] UNIV VIRGINIA,DEPT MAT SCI,CHARLOTTESVILLE,VA 22901

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1991年 / 64卷 / 05期

关键词：

D O I：

10.1080/09500839108214626

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Melt-spun Al65Cu15Co20 ribbons annealed at 550-degrees-C for 62 days have been studied in high-resolution electron microscopy (HREM). No structural transformation of the decagonal phase has been observed. Using the centres of tenfold ring cluster, both HREM pictures for the long-term annealed and unannealed samples can be covered completely with Penrose tiles from set P1 and set P3, with the tile length 12-4 angstrom, which is a tau--1 scaling of our previous tile length (20 angstrom). Phason fluctuations calculated for both samples are found to be similar. The observed structures can be described by a random tiling model based on Penrose tiles from set P1 and P3, which is different from conventional random binary tiling. The important roles of composition and frozen-in phason disorder in the stability of the decagonal phase are discussed.

引用

页码：307 / 315

页数：9

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