ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The effect of phase transformation and fine particle dispersion on densification behaviorof high purity nanocrystalline alumina was investigated. The γ/α phase ratio of the mixturecompacts were affected detrimentally by sinterability and phase transformation of α-phase aluminaceramics. The densification was significantly deteriorated with increasing γ-phase owing to facetedpores which are caused by the formation of a colony. The faceted pores were not existed in the α-Al2O3 ceramics with 10% γ-phase. Densification of the 10% γ-phase dispersed α-Al2O3 ceramicswas significantly enhanced by rapid transformation of α-alumina. The grain growth was effectivelyinhibited by a small amount of nanoparticle dispersion for the alumina ceramics. As a result, densenanostructured alumina can be achieved in the 10% γ-phase dispersed α-Al2O3 ceramics, evensintering at 1400oC for 3 hours
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.831.pdf
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