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:
In the present work the influence of two different thermal debinding atmosphere, vacuum andair, on the properties of 5wt% Y2O3-doped aluminum nitride (AlN) ceramics was investigated. The AlNpowder as a raw material was synthesized by self-propagating high-temperature synthesis (SHS) andcompact was fabricated by employing powder injection molding technique. The polymer-wax binderconsists of 60wt% paraffin wax (PW), 35wt% polypropylene (PP) and 5wt% stearic acid (SA). The binderwas removed through debinding process in two steps, solvent debinding followed by thermal debinding.After the removal of binder, specimens were sintered at 1850˚С in nitrogen atmosphere at atmosphericpressure. The result reveals that debinding atmosphere has significant effect on the thermal conductivityand densification of AlN ceramics. The microstructure and secondary phase identification wasdetermined by scanning electron microscopy and X-ray diffraction. The thermal conductivity and densityof injection molded AlN ceramics are 177.3W·m-1·K-1 and 3.31g·cm-3 in the air and 200.8W·m-1·K-1 and3.28g·cm-3 in the vacuum
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1028.pdf
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