Atomic growth mechanisms for lamellar structures

• Published in: Ultramicroscopy Vol. 30; no. 1; pp. 116 - 131
• Main Authors: Fonda, R.W., Shiflet, G.J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.1989
• ISSN: 0304-3991; 1879-2723
• DOI: 10.1016/0304-3991(89)90179-4

This paper will examine the role of interfacial structure in two lamellar phase transformations in solids, namely the pearlite and the discontinuous (cellular) reactions. Both transformations result in alternating plates of different composition and crystal structure. Other similarities between the two types of transformations will be noted. The relationship between the phases at the growth interface and the interlamellar interface is studied, showing that crystallography plays a significant role in interfacial structure. We have generalized the analysis developed by Van der Merwe for thin-film epitaxy in fcc:bcc for application to any interface. This allows the relative energies of different conjugate habit planes to be surveyed in one plot. Although we apply the analysis on rigid lattices, this approach can be further extended to allow for interfacial misfit strains.