Recovery of Tetragonal Phase from Previously Transformed Y-TZP
ZrO2(Y2O3)-based ceramics are widely used as biomaterials due to high fracture toughness, resulting from the tetragonal-monoclinic phase transformation in which the ceramic is submitted during crack propagation. In this context, studies involving the possibility of optimization of the tetragonal pha...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2016-06-01
|
| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/pdf/mr/v19n4/1516-1439-mr-1980-5373-MR-2015-0426.pdf |
| _version_ | 1798015366113263616 |
|---|---|
| author | Bruno Galvão Simba Claudinei dos Santos Kurt Strecker Antonio Alves de Almeida Junior Gelson Luis Adabo |
| author_facet | Bruno Galvão Simba Claudinei dos Santos Kurt Strecker Antonio Alves de Almeida Junior Gelson Luis Adabo |
| author_sort | Bruno Galvão Simba |
| collection | DOAJ |
| description | ZrO2(Y2O3)-based ceramics are widely used as biomaterials due to high fracture toughness, resulting from the tetragonal-monoclinic phase transformation in which the ceramic is submitted during crack propagation. In this context, studies involving the possibility of optimization of the tetragonal phase are important for the properties improvement of this ceramic. This study investigated the recovery of tetragonal phase from a previously transformed ZrO2(3 mol% Y2O3) ceramic. Zirconia samples were sintered at 1450 °C, at 1530 °C - 2 h and at 1600 °C - 4 h, in order to obtain materials with distinct microstructural features. The sintered samples were characterized by relative density, X-ray diffraction and scanning electron microscopy. Samples sintered at 1450 °C, 1530 °C - 2 h and 1600 °C - 4 h, presented relative densities of 94.2, 99.6 and 99.7% with grains size averages of 0.28, 0.49 and 1.31 µm, respectively. All samples were submitted to milling to induce the tetragonal→monoclinic phase transformation presenting 5, 50 and 65 vol% of monoclinic phase. Subsequently, heat treatments between 400 °C and 1200 °C were conducted to retransform monoclinic in tetragonal phase. It has been found that the smaller the grain size after sintering, the lower the necessary annealing temperatures for fully recovering of tetragonal phase. Annealing temperatures of 950, 1100 and 1200 °C were sufficient to recover almost fully the tetragonal phase. |
| first_indexed | 2024-04-11T15:32:17Z |
| format | Article |
| id | doaj.art-2d503f23881a473293f14589f8d954ba |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-11T15:32:17Z |
| publishDate | 2016-06-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-2d503f23881a473293f14589f8d954ba2022-12-22T04:16:06ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392016-06-0119482983310.1590/1980-5373-MR-2015-0426Recovery of Tetragonal Phase from Previously Transformed Y-TZPBruno Galvão SimbaClaudinei dos SantosKurt StreckerAntonio Alves de Almeida JuniorGelson Luis AdaboZrO2(Y2O3)-based ceramics are widely used as biomaterials due to high fracture toughness, resulting from the tetragonal-monoclinic phase transformation in which the ceramic is submitted during crack propagation. In this context, studies involving the possibility of optimization of the tetragonal phase are important for the properties improvement of this ceramic. This study investigated the recovery of tetragonal phase from a previously transformed ZrO2(3 mol% Y2O3) ceramic. Zirconia samples were sintered at 1450 °C, at 1530 °C - 2 h and at 1600 °C - 4 h, in order to obtain materials with distinct microstructural features. The sintered samples were characterized by relative density, X-ray diffraction and scanning electron microscopy. Samples sintered at 1450 °C, 1530 °C - 2 h and 1600 °C - 4 h, presented relative densities of 94.2, 99.6 and 99.7% with grains size averages of 0.28, 0.49 and 1.31 µm, respectively. All samples were submitted to milling to induce the tetragonal→monoclinic phase transformation presenting 5, 50 and 65 vol% of monoclinic phase. Subsequently, heat treatments between 400 °C and 1200 °C were conducted to retransform monoclinic in tetragonal phase. It has been found that the smaller the grain size after sintering, the lower the necessary annealing temperatures for fully recovering of tetragonal phase. Annealing temperatures of 950, 1100 and 1200 °C were sufficient to recover almost fully the tetragonal phase.http://www.scielo.br/pdf/mr/v19n4/1516-1439-mr-1980-5373-MR-2015-0426.pdfZrO2(Y2O3) ceramicssinteringphase transformationmicrostructure |
| spellingShingle | Bruno Galvão Simba Claudinei dos Santos Kurt Strecker Antonio Alves de Almeida Junior Gelson Luis Adabo Recovery of Tetragonal Phase from Previously Transformed Y-TZP Materials Research ZrO2(Y2O3) ceramics sintering phase transformation microstructure |
| title | Recovery of Tetragonal Phase from Previously Transformed Y-TZP |
| title_full | Recovery of Tetragonal Phase from Previously Transformed Y-TZP |
| title_fullStr | Recovery of Tetragonal Phase from Previously Transformed Y-TZP |
| title_full_unstemmed | Recovery of Tetragonal Phase from Previously Transformed Y-TZP |
| title_short | Recovery of Tetragonal Phase from Previously Transformed Y-TZP |
| title_sort | recovery of tetragonal phase from previously transformed y tzp |
| topic | ZrO2(Y2O3) ceramics sintering phase transformation microstructure |
| url | http://www.scielo.br/pdf/mr/v19n4/1516-1439-mr-1980-5373-MR-2015-0426.pdf |
| work_keys_str_mv | AT brunogalvaosimba recoveryoftetragonalphasefrompreviouslytransformedytzp AT claudineidossantos recoveryoftetragonalphasefrompreviouslytransformedytzp AT kurtstrecker recoveryoftetragonalphasefrompreviouslytransformedytzp AT antonioalvesdealmeidajunior recoveryoftetragonalphasefrompreviouslytransformedytzp AT gelsonluisadabo recoveryoftetragonalphasefrompreviouslytransformedytzp |