Sintering Al2O3-Cr Composites Made From Micro- and Nanopowders

This paper presents the results of studies on sintering Al2O3-Cr composites of different chemical compositions (from 25 to 75 vol.% of each component). The factor analyzed was the influence of time (from 15 to 60 min.), temperature (from 1200-16000, pressure (0.5 and 30 MPa) and powder graining (for...

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Bibliographic Details
Published in:Science of sintering 2004-09, Vol.36 (3), p.171-177
Main Authors: Pietrzak, K, Chmielewski, M, Wlosinski, W
Format: Article
Language:English
Online Access:Get full text
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Summary:This paper presents the results of studies on sintering Al2O3-Cr composites of different chemical compositions (from 25 to 75 vol.% of each component). The factor analyzed was the influence of time (from 15 to 60 min.), temperature (from 1200-16000, pressure (0.5 and 30 MPa) and powder graining (for Al2O3 powders 80nm or 1um) on the density of sinters obtained. It was found that nanopowder composites are characterized by a higher density (by about 1-2%) than the micropowder composite, the remaining conditions of the process intact. Using the pressure of 30MPa allows obtaining of a definite sintering degree at a temperature of about 200DGC lower than at a pressure of 0.5 MPa.
ISSN:0350-820X
DOI:10.2298/SOS0403171P