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The effects of nitrided treatment during different sintering stages on the microstructure and mechanical properties of Ti(C, N) based cermets were studied. The results showed that: compared with the sample sintered in vacuum, the surface microstructures of these samples which nitrogen gas was introduced in entire stage, heating stage and final sintering stage changed obviously, the porosity greatly...
In an attempt to improve the understanding of fracture behavior of brittle cemented carbides with NbC addition, a detailed study was conducted with the main goal of characterizing the fracture character and crack growth mode. The study showed that NbC had a significant influence on the mechanical properties of WC–10Co alloys. The maximum hardness and transverse rupture strength were observed when...
Functionally graded Ti(C,N)-based cermets were prepared by a simple and economic procedure which combined vacuum liquid phase sintering with nitriding treatment during cooling in one cycle. The prepared cermets were investigated using scanning electron microscope (SEM), energy dispersive X-ray analysis (EDX) and electron probe microanalysis (EPMA). It was found that the high nitrogen activity in the...
Ti(C,N)-based cermets were subject to double-glow plasma carburization which substantially improved the surface hardness. The microstructures were studied using scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDX). It was found that the double-glow plasma carburization introduced a graded surface zone enriched in carbonitride phase and deficient in binder phase. The microstructure...
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