Open AccessSintering AL2O3-CR composites made from micro-and Nan powders
Author(s) -
K. Pietrzak,
Marcin Chmielewski,
W. Włosiński
Publication year - 2004
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos0403171p
Subject(s) - sintering , materials science , composite number , composite material , powder metallurgy , granularity , computer science , operating system
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 1200-1600°C), pressure (0.5 and 30 MPa) and powder graining (for Al2O3 powders-80nm or 1μm) on the density of sinters obtained. It was found that Nan powder composites are characterized by a higher density (by about 1-2%) than the micro powder 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 200°C lower than at a pressure of 0.5 MPa