Enhanced facture toughness of (W,Ti)C by addition of CNT
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The grain size of (W,Ti)C powder remarkably decreases with a high-energy ball milling. The rapid sintering of nanostructured(W,Ti)C and (W,Ti)C-5 vol.%CNT hard materials was investigated with high frequency induction heating. The advantage ofthis process is that it allows very quick densification to near theoretical density and prohibition of grain growth innanostructured materials. A dense nanostructured (W,Ti)C and (W,Ti)C-5 vol.%CNT hard material with a relative density ofup to 99% was produced with simultaneous application of 80 MPa pressure and induced output current with total powercapacity of 15 kW within 3 minutes. The effect of CNT on the sintering behavior and mechanical properties of (W,Ti)C wasinvestigated. The fracture toughness of (W,Ti)C increased by addition of CNT.
Abstract
The grain size of (W,Ti)C powder remarkably decreases with a high-energy ball milling. The rapid sintering of nanostructured(W,Ti)C and (W,Ti)C-5 vol.%CNT hard materials was investigated with high frequency induction heating. The advantage ofthis process is that it allows very quick densification to near theoretical density and prohibition of grain growth innanostructured materials. A dense nanostructured (W,Ti)C and (W,Ti)C-5 vol.%CNT hard material with a relative density ofup to 99% was produced with simultaneous application of 80 MPa pressure and induced output current with total powercapacity of 15 kW within 3 minutes. The effect of CNT on the sintering behavior and mechanical properties of (W,Ti)C wasinvestigated. The fracture toughness of (W,Ti)C increased by addition of CNT.
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