| Revista: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312801 |
| ISSN: | 1516-1439 |
| Autores: | Acchar, Wilson1 Cairo, Carlos Alberto2 Segadaes, Ana Maria3 |
| Instituciones: | 1Universidade Federal do Rio Grande do Norte, Departamento de Fisica, Natal, Rio Grande do Norte. Brasil 2Instituto de Aeronautica e Espaco, Centro Tecnico Aeroespacial, Sao Jose dos Campos, Sao Paulo. Brasil 3Universidade de Aveiro, Departamento de Engenharia Ceramica e do Vidro, Aveiro. Portugal |
| Año: | 2005 |
| Periodo: | Ene-Mar |
| Volumen: | 8 |
| Número: | 1 |
| Paginación: | 109-112 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | Alumina-based composites have been developed in order to improve the mechanical properties of the monolithic matrix and to replace the WC-Co material for cutting tool applications. Al2O3 reinforced with refractory carbides improves hardness, fracture toughness and wear resistance to values suitable for metalworking applications. Al2O3-NbC composites were uniaxially hot-pressed at 1650 °C in an inert atmosphere and their mechanical properties and microstructures were analyzed. Sintered density, average grain size, microhardness and fracture toughness measurements and microstructural features were evaluated. Results have shown that the mechanical properties of alumina-NbC are comparable to other carbide systems. Microstructural analysis has shown that the niobium carbide particles are mainly located at the grain boundaries of alumina grains, which is an evidence of the "pinning effect", produced by NbC particles |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería de materiales, Ingeniería mecánica, Ingeniería metalúrgica, Aluminio, Carburo de niobio, Herramientas de corte, Propiedades mecánicas, Microestructuras, Resistencia, Desgaste |
| Keyword: | Engineering, Materials engineering, Mechanical engineering, Metallurgical engineering, Aluminum, Niobium carbide, Cutting tools, Mechanical properties, Microstructures, Resistance, Wear |
| Texto completo: | Texto completo (Ver HTML) |
