Colloidal processing of zirconium diboride ultra-high temperature ceramics

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dc.contributor.authorTallon, Cen_AU
dc.contributor.authorChavara, DTen_AU
dc.contributor.authorGillen, ALen_AU
dc.contributor.authorRiley, Den_AU
dc.contributor.authorEdwards, Len_AU
dc.contributor.authorMoricca, SAen_AU
dc.contributor.authorFranks, GVen_AU
dc.date.accessioned2015-11-01T00:12:08Zen_AU
dc.date.available2015-11-01T00:12:08Zen_AU
dc.date.issued2013-05-21en_AU
dc.date.statistics2015-10-21en_AU
dc.description.abstractColloidal processing of the Ultra-High Temperature Ceramic (UHTC) zirconium diboride (ZrB2) to develop near−net-shaping techniques has been investigated. The use of the colloidal processing technique produces higher particle packing that ultimately enables achieving greater densification at lower temperatures and pressures, even pressureless sintering. ZrB2 suspension formulations have been optimized in terms of rheological behavior. Suspensions were shaped into green bodies (63% relative density) using slip casting. The densification was carried out at 1900°C, 2000°C, and 2100°C, using both hot pressing at 40 MPa and pressureless sintering. The colloidally processed materials were compared with materials prepared by a conventional dry processing route (cold pressed at 50 MPa) and subjected to the same densification procedures. Sintered densities for samples produced by the colloidal route are higher than produced by the dry route (up to 99.5% relative density by hot pressing), even when pressureless sintering is performed (more than 90% relative density). The promising results are considered as a starting point for the fabrication of complex-shaped components that can be densified at lower sintering temperatures without pressure. © 2013, The American Ceramic Society.en_AU
dc.identifier.citationTallon, C., Chavara, D., Gillen, A., Riley, D., Edwards, L., Moricca, S., & Franks, G. V. (2013). Colloidal Processing of Zirconium Diboride Ultra-High Temperature Ceramics. Journal of the American Ceramic Society, 96(8), 2374-2381. doi:10.1111/jace.12383en_AU
dc.identifier.govdoc6206en_AU
dc.identifier.issn0002-7863en_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleJournal of the American Ceramic Societyen_AU
dc.identifier.pagination2374-2381en_AU
dc.identifier.urihttp://dx.doi.org/10.1111/jace.12383en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6363en_AU
dc.identifier.volume96en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley and Sonsen_AU
dc.subjectZirconiumen_AU
dc.subjectOxidationen_AU
dc.subjectSuspensionsen_AU
dc.subjectMachiningen_AU
dc.subjectHomogenization methodsen_AU
dc.subjectPressure dependenceen_AU
dc.titleColloidal processing of zirconium diboride ultra-high temperature ceramicsen_AU
dc.typeJournal Articleen_AU
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