论文成果
The delta-Al4Cu9 phase as an approximant of quasicrystals
- 点击次数：
- 论文类型：期刊论文
- 发表时间：1996-06-01
- 发表刊物：PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS
AND MECHANICAL PROPERTIES
- 收录刊物：SCIE、Scopus
- 文献类型：J
- 卷号：73
- 期号：6
- 页面范围：1519-1528
- ISSN号：0141-8610
- 摘要：This paper analyses the structural properties of the delta-Al4Cu9 phase as an approximant to quasicrystals. The discussion is developed along two directions. One is the valence electron concentration (VEC) correlation; both the delta-Al4Cu9 and Al-Cu-Fe icosahedral phases are Hume-Rothery intermetallics with similar values of VEC per unit volume. The other is atomic structural resemblance analysis; delta-Al4Cu9 can be viewed either as six-layer stacking of flat and puckered layers along one [110] direction or as parallel pentagonal columns aligned along the same direction. It is also pointed out that vacancy sites play two important roles: to regulate a relatively constant VEC per unit volume and to facilitate the formation of basic pentagonal configurations.
