Experimental and thermodynamic investigation of gradient zone formation for Ti(C,N)-based cermets sintered in nitrogen atmosphere

Zhang, Cong; Yin, Haiqing; Zhang, Ruijie; Jiang, Xue; Liu, Guoquan; Du, Yong

doi:10.1016/j.ceramint.2017.06.064

Cited by 15 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many factors, such as alloy composition and sintering cycle, can have significant influence on the microstructure, phase constitution and properties of cermets. An integrated approach of thermodynamic calculations and experiments was successfully applied to investigate the gradient zone formation for Ti(C,N)-based cermets sintered in N2 atmosphere [31]. In this study, thermodynamic simulation was performed to access the influence of Ti(C0.5N0.5) content on the phase constitution and phase composition of the NbC-Ti(C0.5N0.5) cermets.…”

Section: Phase Analysismentioning

confidence: 99%

Microstructural investigation and machining performance of NbC-Ti(C0.5N0.5) matrix cermets

Huang

Nie

Guo

et al. 2019

International Journal of Refractory Metals and Hard Materials

View full text Add to dashboard Cite

In this study, Ni or Co + Ni bonded NbC matrix cermets with secondary carbides (Mo2C and WC) as well as Ti(C0.5N0.5) were prepared by liquid phase sintering at 1450°C in vacuum. Detailed microstructural investigation was performed by SEM, EPMA and XRD analysis. The microstructure, mechanical properties as well as the C45 (HB140) steel turning performance of the cermets were investigated, and compared with a commercial Ti(C0.5N0.5) based cutting insert. The sintering results indicated that the partial substitution of NbC by Ti(C0.5N0.5) had a significant effect on the core-rim microstructure and refinement of NbC solution grains, as well as improved mechanical properties of the NbC-Ti(C0.5N0.5) cermets. The phase constitution and composition of the cermets were supported by thermodynamic equilibrium calculations. All sintered cermets were composed of a fcc solid solution metal binder and a cubic core-rim (Nb,Ti,Mo,W)(C,N) solution phase, as well as an independent Nrich Ti(C,N) phase. The NbC-Ti(C0.5N0.5) and Ti(C0.5N0.5) matrix cermets had a comparable HV30 of 1500-1600 kg/mm 2 and a similar fracture toughness of 8.0 MPa m 1/2 .

show abstract

Section: Phase Analysismentioning

confidence: 99%