Effects of Cobalt Addition and Temperature on Microstructure and Density of W-25Cu Composites Prepared via Liquid Infiltration

Abstract:

In this study, the effect of Co and sintering temperature on microstructure of W-25Cu composites prepared via copper melt infiltration has been investigated. The concentration of Co addition used ranged from 0.5 to 3wt. %. The infiltration temperatures were performed at 1150°C and 1250°C for 2 hr under vacuum. The microstructure and sintering density of W-25Cu composites are discussed. Results indicated that, the relative density (RD) and microstructure of W-25wt. % Cu were greatly affected by the addition of low Co concentration and sintering temperature. The concentration of 3 wt. % Co to tungsten-copper compact and infiltration temperature of 1250°C give high sintering density of 98.6% theoretical density (TD). The concentration of Co and infiltrating temperature have strong effects on the densification of W-Cu composite materials. The sintered compact microstructures and density were obtained using scanning electron microscope (SEM) coupled with EDX and Archimedes technique respectively.

• Periodical: Advanced Materials Research (Volume 626)
• Pages: 430-435
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.626.430
• Online since: December 2012
• Authors: Ibrahim Hafed, Aziz Azizan, Rahmat Azmi
• Keywords: Densification, Microstructure, W-Cu Composites

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