Publicação: alpha-SiAlON ceramics with elongated grain morphology using an alternative sintering additive
dc.contributor.author | Santos, C. | |
dc.contributor.author | Strecker, K. | |
dc.contributor.author | Ribeiro, S. | |
dc.contributor.author | de Souza, JVC | |
dc.contributor.author | Silva, OMM | |
dc.contributor.author | da Silva, CRM | |
dc.contributor.institution | Universidade de São Paulo (USP) | |
dc.contributor.institution | Ctr Tecn Aeroesp | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T15:29:48Z | |
dc.date.available | 2014-05-20T15:29:48Z | |
dc.date.issued | 2004-04-01 | |
dc.description.abstract | In this work, the use of a natural yttrium oxide and rare earth oxide solid solution (CRE2O3) as stabilizers of the alpha-Si3N4 phase to form alpha-SiAlON has been investigated. This oxide mix is produced at FAENQUIL-DEMAR, at a cost of only 20% of pure commercial Y2O3. Two alpha-SiAlONs using pure Y2O3 or CRE2O3 have been prepared, using mixes of 20% by volume of a molar fraction of 9:1 of AlN to Y2O3 or AlN to CRE2O3, respectively, with 80% alpha-Si3N4. Samples were gas pressure-sintered at 1900 degreesC, under 1.5 MPa of N-2 for 60 min. Both compositions yielded alpha-SiAlON ceramics with high relative densities (98% t.d.), hardness of 18 GPa and fracture toughness of 5 Mpa m(1/2), with homogeneous microstructures composed of elongated alpha-SiAlON grains with aspect ratios of 5. It is concluded that the mixed rare earth concentrate (CRE2O3) can be used to produce alpha-SiAlON ceramics with similar microstructures and mechanical properties of alpha-SiAlON ceramics fabricated using pure Y2O3, but with the advantage of its lower production cost. (C) 2004 Elsevier B.V All rights reserved. | en |
dc.description.affiliation | FAENQUIL, DEMAR, Dept Mat Engn, BR-12600000 Lorena, SP, Brazil | |
dc.description.affiliation | Ctr Tecn Aeroesp, Div Mat, AMR, CTA, BR-12228904 Sao Jose Dos Campos, SP, Brazil | |
dc.description.affiliation | UNESP, FEG, BR-12516410 Guaratingueta, SP, Brazil | |
dc.description.affiliationUnesp | UNESP, FEG, BR-12516410 Guaratingueta, SP, Brazil | |
dc.format.extent | 1792-1796 | |
dc.identifier | http://dx.doi.org/10.1016/j.matlet.2003.10.054 | |
dc.identifier.citation | Materials Letters. Amsterdam: Elsevier B.V., v. 58, n. 11, p. 1792-1796, 2004. | |
dc.identifier.doi | 10.1016/j.matlet.2003.10.054 | |
dc.identifier.issn | 0167-577X | |
dc.identifier.uri | http://hdl.handle.net/11449/39300 | |
dc.identifier.wos | WOS:000220244900028 | |
dc.language.iso | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation.ispartof | Materials Letters | |
dc.relation.ispartofjcr | 2.687 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | sintering additive | pt |
dc.subject | alpha-SiAlON | pt |
dc.subject | microstructure | pt |
dc.subject | mechanical properties | pt |
dc.title | alpha-SiAlON ceramics with elongated grain morphology using an alternative sintering additive | en |
dc.type | Artigo | |
dcterms.license | http://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy | |
dcterms.rightsHolder | Elsevier B.V. | |
dspace.entity.type | Publication | |
unesp.author.orcid | 0000-0001-6301-6446[6] | |
unesp.author.orcid | 0000-0001-9700-0901[4] | |
unesp.author.orcid | 0000-0002-0741-739X[3] |
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