PREPARATION OF CERAMICS FROM MAGNETIC-PULSE-COMPACTED NANOMETER-SIZEDAL2O3 POWDER

Authors
IVANOV VV KHRUSTOV VR
Citation
Vv. Ivanov et Vr. Khrustov, PREPARATION OF CERAMICS FROM MAGNETIC-PULSE-COMPACTED NANOMETER-SIZEDAL2O3 POWDER, Inorganic materials, 34(4), 1998, pp. 401-404
Citations number
10
Categorie Soggetti
Material Science
Journal title
Inorganic materials → ACNP
ISSN journal
00201685
Volume
34
Issue
4
Year of publication
1998
Pages
401 - 404
Database
ISI
SICI code
0020-1685(1998)34:4<401:POCFMN>2.0.ZU;2-U
Abstract
The sintering behavior of powder compacts prepared by magnetic-pulse c ompression of 20-nm gamma-Al2O3 powder was studied with the aim to opt imize sintering conditions. Dense alpha-Al2O3 ceramics are obtained wi th an average grain size of 100-150 nm and relative density of 97%. De nse nanocrystalline Al2O3 ceramics can only be obtained from well-dens ified green compacts (70-80% of theoretical density). Rapid, uncontrol led-rate heating is unsuitable for sintering nanocrystalline powders.