Published April 2007
| Version v1
Journal article
Grain shrinkage driven by surface and grain boundary energy in Ba5Nb4O15 powder
- 1. Nano Ceramics Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
- 2. Electron Microscope Laboratory, Faculty of Science and Technology, Ryukoku University, 1-5 Yokotani Seta-Ooe, Otsu, Shiga 520-2194 (Japan)
- 3. Division for Research Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504 (Japan)
Description
The shrinkage and disappearance of small Ba5Nb4O15 grains in a large grain matrix at 1133 K observed by transmission electron microscopy (TEM), included grain volume and boundary shrinkage. Rate equations for these processes were formulated based on the concept that total excess free energy directly stimulates material transport in volume, surface, or grain boundary diffusion. Based on these equations, grain vanishing was simulated and it was found that volume diffusion combined with boundary diffusion occurred, and high grain boundary energy and low grain boundary diffusivity made grains vanish while maintaining a truncated spherical shape
Additional details
Identifiers
- DOI
- 10.1016/j.actamat.2006.11.037;
- PII
- S1359-6454(06)00847-0;
Publishing Information
- Journal Title
- Acta Materialia
- Journal Volume
- 55
- Journal Issue
- 7
- Journal Page Range
- p. 2423-2432
- ISSN
- 1359-6454
- CODEN
- ACMAFD
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39034753
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; DIFFUSION; GRAIN BOUNDARIES; GRAIN GROWTH; NIOBIUM OXIDES; REACTION KINETICS; SHRINKAGE; SINTERING; SURFACE ENERGY; SURFACES; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; ELECTRON MICROSCOPY; ENERGY; FABRICATION; FREE ENERGY; KINETICS; MICROSCOPY; MICROSTRUCTURE; NIOBIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; SURFACE PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.