期刊
SCRIPTA MATERIALIA
卷 69, 期 7, 页码 529-532出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.06.019
关键词
Spark plasma sintering; Crystalline nanostructure; Alumina; Grain growth
类别
资金
- Spanish Ministry of Science and Innovation [MAT2009-11078]
The aim of this study is to elucidate the coarsening kinetics involved during densification of fine-grained pure alpha-alumina by spark plasma sintering. Low temperature and short dwell time sintering conditions were used to preserve the nanocrystalline structure of the starting commercial powder (about 50 nm). Notwithstanding the above, submicron grain coarsened microstructures have been developed. The microstructure evolution of alumina under different sintering conditions points to a nanograin rotation densification mechanism as being responsible for the fast grain growth observed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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