dc.contributor.author |
Kaga, Y |
en |
dc.contributor.author |
Jones, Mark |
en |
dc.contributor.author |
Hirao, K |
en |
dc.contributor.author |
Kanzaki, S |
en |
dc.date.accessioned |
2012-04-04T02:46:53Z |
en |
dc.date.issued |
2007 |
en |
dc.identifier.citation |
Journal of Materials Science 42(2):699-704 2007 |
en |
dc.identifier.issn |
0022-2461 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/16692 |
en |
dc.description.abstract |
Y-α-SiAlONs with elongated grains were fabricated via a reaction-bonding process using starting compositions containing excess oxides in the form of Y2O3 and SiO2. The density of post-sintered specimens reached a maximum value with compositions containing 2 mass% excess oxides, although conventionally sintered materials of this composition were not fully dense. However for compositions containing smaller amounts of excess oxides, the density of the specimen fabricated via a reaction-bonding process was lower than that via a conventional process. In these samples it is thought that liquid phase sintering was difficult to be achieve during the post-sintering process, since the amount of SiO2 contained in the starting powder was lower and the Al2O3 in the starting composition was consumed for the production of β-SiAlON during nitridation. There was also a decrease in density of the reaction-bonded materials with further increases in the amounts of additional oxides. For these samples the compacts could not be densified uniformly, because of non-uniformity of the phase composition in the nitrided compacts. The dense reaction bonded α-SiAlON with elongated grains, fabricated from compositions with 2 mass% excess oxides exhibited both high fracture toughness and high hardness. |
en |
dc.publisher |
Springer Science & Business Media B.V. |
en |
dc.relation.ispartofseries |
Journal of Materials Science |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0022-2461/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Effect of the amount of excess oxides on the densification of alpha-SiAlON fabricated via a reaction-bonding process |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1007/s10853-006-1004-9 |
en |
pubs.issue |
2 |
en |
pubs.begin-page |
699 |
en |
pubs.volume |
42 |
en |
dc.rights.holder |
Copyright: Springer Science & Business Media, LLC |
en |
pubs.end-page |
704 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
86134 |
en |
pubs.org-id |
Engineering |
en |
pubs.org-id |
Chemical and Materials Eng |
en |
pubs.record-created-at-source-date |
2010-09-01 |
en |