ISSN:
1662-9752
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:
Water debinding is a new technique for ceramic injection molding. Compared withconventional thermal debinding, water-debinding has many advantages, such as environmentfriendly, high debinding rate, and suitable for molding large sized ceramic part. In this paper, bindersystem, based on polyethylene glycol(PEG) and polyvinyl butyryl(PVB), was mixed with3Y-TZP(ZrO2) powder, and feedstock with 54vol% of ceramic powders was obtained. Shear viscosityof the feedstock was 300Pa·s at 190oC, when shear rate was 100/s, similar to the feedstock based onparaffin wax(PW). SEM showed that the feedstock and sintered parts were both homogeneous. Waterdebinding dynamics was also studied. For the 5mm x 6mm x 42mm sample, 65% of PEG could beextracted within 2 hours in water at 40oC, and the bending strength of sintered compacts was above900MPa. The samples with thickness from 9mm to 12mm were made and the green parts could bedebinded in water without any defects. The results showed water debinding method could increase thedebinding rate and was effective to fabricate large sized ceramic parts
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.507.pdf
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