The influence of concentration-dependent diffusivity on the growth kinetics of individual ledges during solid–solid phase transformations

2007 ◽  
Vol 55 (7) ◽  
pp. 2503-2508 ◽  
Author(s):  
C. Atkinson

The problem of step motion during lateral growth in solid-solid phase transformations is re-examined. Results are obtained for the steady motion of an individual ledge when volume diffusion in the parent phase is the predominant contribution to the growth rate. A comparison is made between our results and the earlier work of Jones & Trivedi (1971). There are significant differences between the two sets of results particularly in the limit of small perturbations to the Laplacian diffusion field. To confirm the accuracy of the results presented here the calculations have been made by two different methods.


1992 ◽  
Vol 215 (1) ◽  
pp. 76-83 ◽  
Author(s):  
K. Radermacher ◽  
S. Mantl ◽  
Ch. Dieker ◽  
H. Lüth ◽  
C. Freiburg

An analysis of the growth characteristics of a train of ledges is presented, where volume diffusion in the parent phase is assumed to be the rate­- controlling factor. First a train of steps of unequal height is considered where the step heights are assumed to be consistent with a steady-state motion so that each step moves with the same speed. It is possible to analyse this situation by asymptotic methods when the steps are either far apart or close together. Explicit results are given for both two- and three-step trains and it is shown how the step heights must vary if a given train is to move steadily at a specified speed. Trains of steps of equal height are also considered and an analysis is made of the relative velocities of such steps due to their interaction.


2009 ◽  
Vol 24 (2) ◽  
pp. 305-309 ◽  
Author(s):  
N.G. Rudawski ◽  
K.S. Jones ◽  
R. Gwilliam

The solid-phase epitaxial growth kinetics of amorphized (011) Si with application of in-plane uniaxial stress to magnitude of 0.9 ± 0.1 GPa were studied. Tensile stresses did not appreciably change the growth velocity compared with the stress-free case, whereas compression tended to retard the growth velocity to approximately one-half the stress-free value. The results are explained using a prior generalized atomistic model of stressed solid-solid phase transformations. In conjunction with prior observations of stressed solid-phase epitaxial growth of (001) Si, it is advanced that the activation volume tensor associated with ledge migration may be substrate orientation-dependent.


2016 ◽  
Vol 42 (15) ◽  
pp. 16941-16947 ◽  
Author(s):  
Lisheng Zhong ◽  
Xi Zhang ◽  
Xin Wang ◽  
Yunhua Xu ◽  
Hong Wu ◽  
...  

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