Influence of tantalum on the microstructure and properties of Ti(C,N)-Ni cermets

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

“…Chicardi et al [15] found that the addition of graphite to the (Ti,Ta)(C,N)-Co cermets caused a significant improvement in the toughness to 10.7 ± 0.6 MPa m 1/2 with a hardness of 12.0 ± 0.5 GPa, due to the formation of ductile phases, Ti x Ta 1Àx Co 3 and a-Co. Naidoo et al [16] found that the addition of Tantalum to Ti(C,N) cermets can result in grain refinement and increases of hardness (from 16.1 GPa to 17.8 GPa) and fracture toughness (from 5.5 MPa m 1/2 to 6.9 MPa m 1/2 ). Wang et al [17] reported that the addition VC can inhibit the grains growth of micrometer grade Ti(C,N)-based cermets, and the addition of nano-TiC increased the instability of cermets properties.…”

Enhanced Interface Structure and Properties of Titanium Carbonitride-Based Cermets with the Extra Solid Phase Reaction

“…The black core phases are Ti(C,N) particles, which were not dissolved and reacted in the sintering process. Moreover, the gray rim phases are the solid solutions, which are composed of (Ti,W,Mo,Ta)(C,N) [ 13 , 14 ]. The white binder phase is observed along the rim phase, which can bring about a larger mean free path and improve the mechanical properties.…”

High temperature oxidation resistance of (Ti,Ta)(C,N)-based cermets

“…After sintering, the cermets consisted of the mentioned carbonitride phase (TixTa1-xC0.5N0. 5) and two Ti-Ta-Co intermetallic compounds, namely, TixTa1-xCo2 and TixTa1-xCo, acting as binder instead of the initial Co. A detailed description of the microstructure and properties of cermets can be found in a previously published study [19].…”

“…These materials are primarily based on tungsten carbide (cemented carbides) or titanium carbonitride (cermets). The desired properties can be achieved through complex alloying with other transition metals, such as Ta and Nb [5][6][7]. In this context, (Ti,Ta)(C,N)-based cermets have been successfully utilized as heat-resistant structural materials, including wear parts and, especially, cutting tools in high-speed finishing and semi-finishing applications due to their excellent physical and chemical properties, such as a favorable hot hardness, excellent wear resistance, perfect chemical stability, low friction coefficient to metals and great thermal deformation resistance [8][9][10][11][12][13][14][15].…”