کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1791607 1023614 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rim formation on crystal faces growing in confinement
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Rim formation on crystal faces growing in confinement
چکیده انگلیسی

A crystal face growing from solution while exerting a normal force on a confining surface is often observed to develop a growth rim surrounding a hollow core. The interpretation has been that this is a manifestation of steady state growth due to the balance between the concentration gradient and stress gradient along the confined crystal surface. In this paper, we present experimental results which show that the growth rim is instead formed as a consequence of faceted growth on the confined surface. Steady state growth is not ensured by a gradient in normal stress, but rather a gradient in step density along the crystal face. The loaded crystal surfaces display a high degree of roughness, and the stress is not uniformly distributed across the surface, but transmitted at discrete asperities. We discuss the implications of these findings for the interpretation of previous experimental results, and for the thermodynamics of crystal growth subject to normal stress.


► Single crystal of NaClO3NaClO3 subject to a normal load have been grown.
► A distinct growth rim is observed and measured on the confined crystal surfaces.
► We show that the rim is formed due to anisotropic growth in a confined geometry.
► Our findings contradict the prevailing hypothesis of stress driven transport.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 346, Issue 1, 1 May 2012, Pages 89–100
نویسندگان
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