Analysis of Sintering Parameters by SPS on Cemented Carbide

Author(s)

Carneiro, Marcelo Bertolete ; Machado, Izabel Fernanda ; Rodrigues, Daniel ; Outeiro, JC

• Document type: Journal article
• Source: BIOHYDROMETALLURY: FROM THE SINGLE CELL TO THE ENVIRONMENT; v. 223, p. 3-pg., 2011-01-01.

Abstract

The aim is to analyze the influence of two sintering process parameters concerning the compact densification of WC-Co. The input variables studied were uniaxial pressure (40 and 60 MPa) and holding time (1 and 3 minutes). The output variables monitored were relative density, microstructural features, besides online monitoring of dynamics of sintering. The samples were sintered in a Dr. Sinter-Syntex machine of Spark Plasma Sintering (SPS), which allows heating rate greater than conventional sintering techniques, with the advantage of lower temperature, time and energy consumption. The powder used was a compaction residue of grade K (with content between 3 and 12%Co). The results showed significant influence of pressure on the density and percentage of the porous area; however, the process parameters did not affect the grain size. (AU)

• FAPESP's process: 10/01073-3 - Study of the mechanical behavior of steels throughout the machining and its relationship with the cutting forces and the machinability
• Grantee: Izabel Fernanda Machado
• Support Opportunities: Regular Research Grants