Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor



Título del documento: Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312950
ISSN: 1516-1439
Autores: 1
Instituciones: 1Universidade Federal do Rio Grande do Norte, Departamento de Fisica, Natal, Rio Grande do Norte. Brasil
Año:
Periodo: Jul-Sep
Volumen: 9
Número: 3
Paginación: 271-274
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés Active filler controlled pyrolysis of polymers (AFCOP) is a recent method for obtaining near-net shaped ceramic bodies. Alumina based composites have been developed for use as cutting tools, so knowledge of the surface composition is extremely important because it is directly related to the hardness and wear resistance Samples containing a fixed concentration of 60 wt. (%) of polysiloxane and a mixture of metallic niobium and alumina powder were homogenized, uniaxially warm pressed at 80 °C and subsequently pyrolyzed in flowing argon at 1200, 1400 and 1500 °C. Analysis of the surface composition was carried out by X ray photoelectron spectroscopy, infrared spectroscopy, X ray diffraction and scanning electron microscopy. The results have indicated that the formation of the phases on the surface depends strongly on the niobium/carbon ratio in the raw materials
Disciplinas: Ingeniería,
Química
Palabras clave: Ingeniería de materiales,
Química de polímeros,
Alúmina,
Carburo de niobio,
Cerámica,
Propiedades mecánicas,
Espectroscopía
Keyword: Engineering,
Chemistry,
Materials engineering,
Polymer chemistry,
Alumina,
Niobium carbide,
Ceramics,
Mechanical properties,
Spectroscopy
Texto completo: Texto completo (Ver HTML)