1. Highly crystalline AlN particles synthesized by SHS method
- Author
-
Fu, Renli, Chen, Kexin, Xu, Xin, and Ferreira, José M.F.
- Subjects
- *
ALUMINUM nitride , *MICROMECHANICS , *BULK solids , *MATERIALS analysis - Abstract
Abstract: Aluminium nitride (AlN) powders were prepared by self-propagating high-temperature synthesis (SHS). Aluminium and AlN powder mixtures with weight ratios of about 60:40, in the absence and in the presence of 3-wt.% NH4F and 3-wt.% NH4F+3-wt.% carbon powders as additives were ignited in a nitrogen atmosphere of 8 MPa. Highly crystalline AlN particles with regular hexagonal morphology were obtained in the presence of 3-wt.% NH4F+3-wt.% carbon. The microstructure development during the reaction and the influence of these additives were determined by SEM/EDS and XRD analysis of the resulting products. A mechanism for the formation of AlN with a regular hexagonal morphology has been suggested. [Copyright &y& Elsevier]
- Published
- 2005
- Full Text
- View/download PDF