Título

Co-based alloy brazing incorporating tungsten nanoparticles

Autor

MARCELA NOHEMI IBARRA CASTRO

HECTOR MANUEL HERNANDEZ GARCIA

JOSE MANUEL ALMANZA ROBLES

RITA MUÑOZ ARROYO

JORGE LEOBARDO ACEVEDO DAVILA

CARLOS ALBERTO GUEVARA CHAVEZ

LOURDES SANTIAGO BAUTISTA

Nivel de Acceso

Acceso Abierto

Resumen o descripción

Tungsten nanoparticles (NP's) were impregnated in fractured samples of a Co-based alloy in order to evaluate their effect over the microstructure of the joint during a brazing process. The structure and morphology of the tungsten NP's were characterized by high resolution transmission electron microscopy (TEM). The brazing filler metal selected for this work was Nicrobraz 210 and it was characterized by scanning electron microscopy (SEM) and Spectrometry X-Ray Fluorescence. Cracks were generated in Co-based alloy rectangular samples of 10 mm x 10mm x 60 mm by bending them with a mechanical testing machine; these fractures were inspected by SEM. For the impregnation of the cracks with NP's, a mixture of 0.5 g of tungsten NP's in 100 ml of ethanol was sonicated for 15 min. This sonicating time promotes the diffusion of tungsten inside the microcracks. The 210-S filler metal was used in the cracked samples with and without tungsten NP's impregnation. The brazing process was conducted in a sealed tube furnace under an Ar gas flow at 1200 °C for 60 min.Brazed samples were analyzed by optical microscope and SEM. The interaction of tungsten nanoparticles with the metallic filler in the melting zone modified the size and the morphology of the formed phases into a finer and uniformly distributed microstructure.

Fecha de publicación

marzo de 2015

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Formato

application/pdf

Sugerencia de citación

M. N. Ibarra-Castro, H. M. Hdz-García, J. M. Almanza-Robles, R. Muñoz-Arroyo, J. L. Acevedo-Dávila, C. Guevara-Chávez, L. Santiago-Bautista. (2015). Co-based alloy brazing incorporating tungsten nanoparticles. International Journal of Engineering and Innovative Technology (IJEIT) Volume 4, Issue 9, March 2015 (87-92). ISSN: 2277-3754

Repositorio Orígen

COMIMSA

Descargas

36

Comentarios



Necesitas iniciar sesión o registrarte para comentar.