The synthesis of c-BN was made possible by the engineering development of ultra-high-pressure processing units in which temperatures and pressures of the order of 1500^oC and 8 GPa. c-BN like the diamond is a very rigid structure and has many similar properties but not identical. A major advantage of c-BN compared to the diamond is its greater stability at high temperatures (above 1000^oC) in the air or in contact with iron and other metals. The hardness of c-BN varies with the orientation of the test surface relative to the crystal lattice and to the type of binder added. This paper presents an experimental study to the sintering of the ternary alloy Nb-Ni-C with the goal of possible future use as a binder for c-BN. The ternary alloy Nb-Ni-C was selected due to its feature metallic-ceramic, to improve sintering and hardness respectively. The ternary alloy Nb-Ni-C were prepared by high energy ball milling. The samples were sintered at high-pressure-high-temperature (HPHT) at 1550^oC, 7.7 GPa for 3 min. Two structurally different systems were select: 1) Nb-Ni (90:10 without carbon added) and 2) Nb-Ni-C (90:10 with different contents of carbon: 0.25, 0.50, 0.75 and 1 wt%). The microstructure of the samples was characterized by XRD and SEM. The mechanical properties were characterized by hardness, toughness, compressing and wear test. The alloy Nb-Ni-C (with 0.25 wt% of carbon added) showed better results: densification above 95%, 930 HV hardness, Young’s modulus of 350 GPa and fracture toughness of 8.2 MPa.m^-1/2.