Preparation of Al2O3-AlN-Ni composites
Journal
Journal of the American Ceramic Society
Journal Volume
80
Journal Issue
9
Pages
2418-2420
Date Issued
1997
Author(s)
Chou W.-B.
Abstract
A method is proposed to prepare Al2O3-AlN-Ni composites. The composites are prepared by sintering Al2O3/NiAl powder mixtures at 1600°C in a mixture of nitrogen and carbon monoxide. The presence of NiAl particles raises the green density of Al2O3/NiAl powder compacts. During sintering, NiAl reacts with nitrogen to form AlN and Ni inclusions. A volume expansion accompanies the reaction. Because of the high green density and the reaction, the volume shrinkage of the Al2O3-AlN-Ni composite decreases with the increase of added NiAl content.
Other Subjects
Alumina; Carbon monoxide; Densification; Density (specific gravity); Firing (of materials); Nickel; Nitrides; Nitrogen; Powders; Residual stresses; Sintering; X ray powder diffraction; Ceramic powder; Green density; Volume expansion; Volume shrinkage; Ceramic matrix composites
Type
journal article