Layered growth of the quasicrystalline decagonal Al3Pd phase in Al/Pd lateral diffusion couples

B. Blanpain*, J. W. Mayer, Joyce C. Liu, King-Ning Tu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The solid-state reaction in an Al/Pd lateral diffusion couple starts with the growth of the crystalline Al3Pd2() phase. When the growth of Al3Pd2 reaches its critical length, the quasicrystalline decagonal Al3Pd() phase starts to grow and both the Al3Pd2 and Al3Pd phases continue to grow afterwards. We have fitted this simultaneous growth with a recently proposed model of kinetic suppression of the second phase. The kinetic analysis directly links the appearance of the decagonal phase as the second phase to its interfacial reaction barrier. We also suggest that the growth of the metastable decagonal Al3Pd phase over the equilibrium phase is a result of its relatively lower interfacial reaction barrier.

Original languageEnglish
Pages (from-to)2671-2674
Number of pages4
JournalPhysical Review Letters
Volume64
Issue number22
DOIs
StatePublished - 1 Jan 1990

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