INFLUENCE OF INITIAL CRYSTAL-STRUCTURE AND ELECTRICAL PULSING ON DENSIFICATION OF NANOCRYSTALLINE ALUMINA POWDER

Authors
MISHRA RS RISBUD SH MUKHERJEE AK
Citation
Rs. Mishra et al., INFLUENCE OF INITIAL CRYSTAL-STRUCTURE AND ELECTRICAL PULSING ON DENSIFICATION OF NANOCRYSTALLINE ALUMINA POWDER, Journal of materials research, 13(1), 1998, pp. 86-89
Citations number
20
Categorie Soggetti
Material Science
Journal title
Journal of materials research → ACNP
ISSN journal
08842914
Volume
13
Issue
1
Year of publication
1998
Pages
86 - 89
Database
ISI
SICI code
0884-2914(1998)13:1<86:IOICAE>2.0.ZU;2-W
Abstract
The effect of the crystal structure of starting alumina powder and ele ctric pulsing on the initial stages of densification has been studied in the temperature range of 1200-1500 degrees C. Multiple electric pul sing cycles enhance the densification significantly. The alpha-alumina powders consolidate more readily in comparison to gamma-alumina powde rs. A high density alpha-alumina specimen (>98% of theoretical density ) was obtained at 1300 degrees C in less than 10 min.