authors |
Ganesh, I; Reddy, GJ; Sundararajan, G; Olhero, SM; Torres, PMC; Ferreira, JMF |
nationality |
International |
journal |
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY |
keywords |
MGAL2O4 SPINEL; ASSISTED SOLIDIFICATION; DENSIFICATION BEHAVIOR; CERAMICS; POWDERS; ROUTE |
abstract |
This paper reports on the synthesis of magnesium aluminate spinel (MAS) powders and consolidation of MAS ceramics by hydrolysis-induced aqueous gelcasting (GCHAS). The MAS powders surface passivated against hydrolysis were dispersed in an aqueous-organic premix solution using suitable dispersants. The consolidation of green bodies occurred under ambient conditions by adding a polymerization initiator, a catalyst, and AlN (0-4.06 wt%) as a cosetting agent. Green samples with exceptionally high green strength (similar to 21 MPa) were obtained in the presence of 4.06 wt% AlN. Sintered (1650 degrees C, 1 h) MAS ceramics consolidated by GCHAS exhibited mechanical properties that are comparable to those consolidated by dry pressing. |
publisher |
WILEY-BLACKWELL |
issn |
1546-542X |
year published |
2011 |
volume |
8 |
issue |
4 |
beginning page |
873 |
ending page |
884 |
digital object identifier (doi) |
10.1111/j.1744-7402.2010.02520.x |
web of science category |
Materials Science, Ceramics |
subject category |
Materials Science |
unique article identifier |
WOS:000292450800020
|