Densification and alloying of microwave sintering WC–8 wt.% Co composites
R Bao, J Yi - International Journal of Refractory Metals and Hard …, 2014 - Elsevier
In this paper, the densification and microstructural evolution of microwave fabricated WC–
8Co composites were studied. Experimental results showed that shrinkage rate increased at
1275–1325° C. The shape of most WC grains was turned into truncated trigonal prism at
1300° C for 5 min. The apparent activation energy of WC coarsening in microwave prepared
alloy was 84.48 Kcal/mol, which was much lower than that in vacuum sintering. Finally, the
local liquid phase sintering mechanism of microwave sintered WC–Co cemented carbide …
8Co composites were studied. Experimental results showed that shrinkage rate increased at
1275–1325° C. The shape of most WC grains was turned into truncated trigonal prism at
1300° C for 5 min. The apparent activation energy of WC coarsening in microwave prepared
alloy was 84.48 Kcal/mol, which was much lower than that in vacuum sintering. Finally, the
local liquid phase sintering mechanism of microwave sintered WC–Co cemented carbide …
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