| Texto completo | |
| Autor(es): |
Santos, C.
[1]
;
Daguano, J. K. M. F.
[1]
;
Rodrigues, Jr., D.
[1]
;
Suzuki, P. A.
[1, 2]
;
Santos, F. A.
[1]
;
Silva, O. M. M.
[3]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] USP EEL Polo Urboind, BR-12600970 Lorena, SP - Brazil
[2] LNLS, BR-13084971 Campinas, SP - Brazil
[3] CTA IAE AMR, BR-12228904 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Materials Letters; v. 91, p. 283-286, JAN 15 2013. |
| Citações Web of Science: | 4 |
| Resumo | |
In this work, the substitution of commercial Y2O3 by a rare earth mixed oxide, RE2O3, to form yttrium aluminum garnet (Y3Al5O12-YAG), was investigated. Al2O3:Y2O3 and Al2O3:RE2O3 powder mixtures were milled and pressed. Compacts were sintered at 1000, 1400 or 1600 degrees C, for 120 min. RE2O3 oxide was characterized by high-resolution X-ray diffraction (HRXRD) and compared to Y2O3. X-ray diffraction pattern of the RE2O3 indicates a true solid solution formation. Rietveld refinement of the sintered YAG and (RE)AG revealed a similar crystal structure. Microstructural analysis of both, YAG or (RE)AG, revealed similar grain sizes of about 2.5 mu m and mechanical properties, with hardness of 400 HV and fracture toughness of 3.8 MPam(1/2). It could be, thus, demonstrated that pure Y2O3 can be substituted by the rare-earth solid solution, RE2O3, in the formation of YAGs, presenting similar microstructures and mechanical properties. (C) 2012 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 05/51485-8 - Avaliação da citotoxicidade de biocerâmicas |
| Beneficiário: | Juliana Kelmy Macário Barboza Daguano |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |
| Processo FAPESP: | 04/04386-1 - Desenvolvimento e caracterização de pilares cerâmicos biocompatíveis à base de compósitos Zr02-Al2O3 |
| Beneficiário: | Claudinei dos Santos |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |