Observations of secondary oscillations in thermal grain boundary grooves

Thermal grain boundary grooving by surface diffusion is accompanied not only by main maxima on either side of a groove, but also by secondary maxima and minima. We measure these oscillations in tungsten and give reasons why the observed secondary maxima and minima are larger than predicted. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.