Estudo da obtenção do compósito Al2O3-10%Co a partir da moagem de alta energia e sinterização por pulso de plasma
The Al2O3-Co-based ceramic composite is a high oxidation resistance, high hardness and low density ceramic phase with excellent toughness and good functionality to the metal phase, as well as the good biocompatibility of both phases, which make them promising materials for applications in the field...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/43077 |
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| Resumo: | The Al2O3-Co-based ceramic composite is a high oxidation resistance, high hardness and low density ceramic phase with excellent toughness and good functionality to the metal phase, as well as the good biocompatibility of both phases, which make them promising materials for applications in the field of biomaterials and cutting tools. Four powders of Al2O3-10% Co compounds were prepared by high energy ball milling for 5, 10, 20 and 30 hours, respectively. Compacts of these powders were Spark Plasma Sintering (SPS) under a pressure of 40 MPa and a temperature of 1350 ° C, with a heating rate of 65 ° C / min and isotherm of 5 min. The raw materials and the genes were characterized by X-ray diffraction (DRX), Scanning Electron Microscopy (MEV), Energy Dispersion Spectroscopy (EDS) and particulometry tests. The sintered samples were characterized by DRX, MEV, Relative Density and Vickers Microhardness. The results showing increased milling time are a reduction in particle size, greater homogeneity of the powders and a better density of the material. |
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