A study of the structure of an Aln-based ceramic obtained from ultrafine powders.

Autor: Artemova, K., Solov'eva, A., Sukacheva, O.
Zdroj: Refractories; 1986, Vol. 27 Issue 3/4, p211-214, 4p
Abstrakt: The specimens obtained by hot pressing plasma-chemical AlN powder contain a mixture of AlN of the hexagonal modification and AlON of the cubic modification. Lattice deformation of the hexagonal phase of AlN takes place during the hot pressing process of the AlN specimens. This is accompanied by a reduction of the lattice parameters in the direction of the a and c axes. The lattice parameters of the hexagonal phase of AlN increase after vacuum-annealing in the 1200-1600°C range. A decrease in the content of AlON and its lattice parameter takes place in the temperature range 1300-1600°C. This is related to the change in the chemical composition of the oxynitride phase. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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