Premium
The substructure of quasicrystalline Al‐Mn alloy observed by TEM
Author(s) -
Chenggao Fan,
Ziqin Wu,
Yuansheng Wang,
Lingchao Tsien
Publication year - 1987
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1987.tb01349.x
Subject(s) - icosahedral symmetry , substructure , nucleation , alloy , quasicrystal , crystallography , materials science , morphology (biology) , microstructure , phase (matter) , diffraction , chemical physics , metallurgy , chemistry , physics , optics , geology , paleontology , structural engineering , organic chemistry , engineering
SUMMARY The morphology of the icosahedral phase in Al 86 Mn 14 alloy has been observed as flower‐like and of granular shape by TEM. These two kinds of morphologies may be regarded as the different sections of a three‐dimensional flower‐like grain. Inside these grains, a fine substructure of a few nm in size has been found. A dendritic morphology with a diffraction pattern showing five‐fold symmetry have also been observed in the Al 86 Mn 14 alloy. On the basis of these observations, a model based on nucleation, growth and aggregation has been proposed to explain the formation process of the quasicrystalline state.