ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Advanced silicon nitride ceramic compact was prepared by colloidal process. The rheologicalbehaviors of the Si3N4 powders were emphatically investigated. At the same time, the effects of thedispersant, pH value and ball milling time on the silicon nitride slurry were discussed. The results showedthat the addition of the dispersant could shift the value of Zeta potential and improve the fluidity of siliconnitride slurries. The well fluidity can be achieved when the amount of the dispersant was 1.2wt%. Besides,a ball milling time of 8h was appropriate. Statistic pattern recognition was used to predict the processingparameters. Then the high density of green compact could be attained while the volume fraction of solidpowders was up to 40%, and the fracture toughness of the sintered body reached 7.2MPa·m1/2. Themicrostructure of final sintered ceramic was observed by scanning electron microscope (SEM)
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2388.pdf
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