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Effect of atmosphere and sintering time on the microstructure and mechanical properties at high temperatures of alpha-SiC sintered with liquid phase Y2O3-Al2O3
dc.contributor.author | Castillo-Rodríguez, Miguel | |
dc.contributor.author | Muñoz, A. | |
dc.contributor.author | Domínguez-Rodríguez, A. | |
dc.date.accessioned | 2024-02-05T08:53:37Z | |
dc.date.available | 2024-02-05T08:53:37Z | |
dc.date.issued | 2006 | |
dc.identifier.issn | 1873-619X | |
dc.identifier.uri | http://hdl.handle.net/10396/27087 | |
dc.description.abstract | The influence that the atmosphere (N2 or Ar) and sintering time have on microstructure evolution in liquid-phase-sintered α-SiC (LPS-α-SiC) and on its mechanical properties at high temperature was investigated. The microstructure of the samples sintered in N2 was equiaxed with a grain size of 0.70 μm and a density of 98% of the theoretical value regardless of the sintering time. In contrast, samples sintered in Ar had an elongated-grain microstructure with a density decreasing from 99 to 95% and a grain size increasing from 0.64 to 1.61 μm as the sintering time increased from 1 to 7 h. The mechanical behaviour at 1450 °C showed the samples sintered in nitrogen to be brittle and fail at very low strains, with a fracture stress increasing from 400 to 800 MPa as the sintering time increased. In contrast, the samples sintered in Ar were quasi-ductile with increasing strain to failure as the sintering time increased, and a fracture stress strongly linked to the form and size of the grains. These differences in the mechanical properties of the two materials are discussed in the text. During mechanical tests, a loss of intergranular phase takes place in a region, between 50 and 150 μm thick, close to the surface of the samples—the effect being more important in the samples sintered in Ar. | es_ES |
dc.format.mimetype | application/pdf | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | https://creativecommons.org/licenses/by-nc-nd/4.0/ | es_ES |
dc.source | Journal of the European Ceramic Society, Vol 26, Issue 12, Pages 2397-2405 (2006) | es_ES |
dc.subject | a-SiC | es_ES |
dc.subject | Mechanical properties | es_ES |
dc.subject | Microstructure | es_ES |
dc.subject | Liquid-phase sintering | es_ES |
dc.title | Effect of atmosphere and sintering time on the microstructure and mechanical properties at high temperatures of alpha-SiC sintered with liquid phase Y2O3-Al2O3 | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.jeurceramsoc.2005.04.018 | es_ES |
dc.relation.projectID | Gobierno de España. MAT2001-0799 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |