A comparative study of zone axis pattern maps from decagonal phases with varying periodicity
- McMaster Univ., Hamilton (Canada). Dept of Materials Science and Metallurgy Indian Inst. of Science, Bangalore (India). Dept. of Metallurgy
- Indian Inst. of Science, Bangalore (India). Dept. of Metallurgy
The discovery in 1985 of the decagonal phase with periodicity in one direction and quasiperiodicity in the other two directions has excited considerable interest. This was followed by the observation that the periodicity perpendicular to the quasiperiodicity plane can assume multiple values on n = [1,2,3,4]x0.4 nm. The mapping of reciprocal spaces of these phases, labelled t[sub 2n], by electron diffraction is important in the context of atomic models for the decagonal phase. While partial determinations have been available for T[sub 4] context of atomic models for the decagonal phase. While partial determinations have been available for T[sub 4] [Al-Co], T[sub 6][Al-Mn] and T[sub 8] [Al-Fe], [Al-Pd], the recent complete determination of zone axis pattern maps [ZAPM] and Kikuchi maps of T[sub 6] [Al-Mn] with 1.24 nm periodicity and T[sub 4][Al-Cu-Co-Si] with 0.8 nm periodicity is a tour de force by Kelton and his co-workers. These papers coupled with the complete mapping of the HOLZ line and Kikuchi line patterns of the T[sub 2][Al-Co-Ni] with 0.4 nm periodicity permit the authors to put in perspective the ZAPM of all the four decagonal phases and in addition predict patterns for the T[sub 8] phase for which a complete experimental determination is still lacking.
- OSTI ID:
- 5455287
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Vol. 30:3; ISSN 0956-716X
- Country of Publication:
- United States
- Language:
- English
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