Estudo da densificação e formação de fases de cerâmicas de alumina dopadas com nióbia e fluoreto de lítio.
The properties of advanced ceramics allow their adoption as ballistic protection, especially the multilayred, which are in the first impact layer. Among these ceramics, alumina (Al2O3) has a lower cost due to its ease of obtaining, but it is limited to low flexion and fracture toughness. Thus, it is...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Brasil |
| Institución: | Instituto Militar de Engenharia (IME) |
| Repositorio: | C&T (Rio de Janeiro. Online) |
| Idioma: | portugués inglés |
| OAI Identifier: | oai:meiramattos.eceme.ensino.eb.br:article/9237 |
| Acceso en línea: | https://ebrevistas.eb.mil.br/CT/article/view/9237 |
| Access Level: | acceso abierto |
| Palabra clave: | Densification. Advanced Ceramics. Alumina. Niobium Oxide. Lithium Fluoride Densificação. Cerâmicas Avançadas. Alumina. Nióbia. Fluoreto de Lítio.. |
| Sumario: | The properties of advanced ceramics allow their adoption as ballistic protection, especially the multilayred, which are in the first impact layer. Among these ceramics, alumina (Al2O3) has a lower cost due to its ease of obtaining, but it is limited to low flexion and fracture toughness. Thus, it is proposed the use of additives, such as niobium oxide (Nb2O5) and lithium fluoride (LiF), which have already shown improvements in the sintering and densification of the final material. Thus, the present work analyzed the influence of these compounds on alumina in order to observe the phase formation. There was an increase of about 14% in densification. Furthermore, the absence of impurities was verified through the phases in the XRD test. The SEM analyzes found a decrease in porosity and phases formed after sintering. |
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