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The growth of AlN dendritic crystals with uniform morphology by an aluminum microdroplet localization approach.
- Source :
-
Combustion & Flame . Oct2018, Vol. 196, p26-34. 9p. - Publication Year :
- 2018
-
Abstract
- Abstract We developed an attractive combustion approach for synthesizing uniformly shaped AlN dendritic crystals by combustion of Al + 0.1AlF 3 + k Al 2 O 3 powder mixtures in a nitrogen atmosphere. The combustion temperature measured for various k values was between 1650 and 1750 °C and the micro-droplets of Al formed in the beginning stages of the process were enveloped by the solid layers of Al 2 O 3 , and the subsequent multipoint nucleation and crystallization produced morphologically and size uniform dendritic crystals. We proposed a theoretical model for calculating the thickness and the number of Al 2 O 3 layers around of Al microdroplets at known concentration of Al 2 O 3. Depending on the concentration of Al 2 O 3 , these structures were simple stars with six points and stellar dendrites with multiple petals. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ALUMINUM
*CRYSTALS
*CLASS A metals
*CRYSTALLOGRAPHY
*NUCLEATION
Subjects
Details
- Language :
- English
- ISSN :
- 00102180
- Volume :
- 196
- Database :
- Academic Search Index
- Journal :
- Combustion & Flame
- Publication Type :
- Academic Journal
- Accession number :
- 131664420
- Full Text :
- https://doi.org/10.1016/j.combustflame.2018.06.006