Cubic boron nitride (cBN) is well known for its super hardness, the second-hardest material after diamond, and also exhibits high temperature stability, thermal conductivity, and chemical stability, which are desirable for applications in extreme environments such as grinding, cutting, and friction welding. Since it has been synthesized by high-pressure processing, typically over than 8 GPa, its size availability has been limited to small sizes (mm scale), which in turn limits widespread applications of cBN. Producing cBN composites with hard metal or ceramics as binder showed reduction in the processing pressure, but still it requires pressures of 5 GPa or higher. Here, we present preliminary results of a new approach for low-pressure (MPa scale) processing of cBN composites, which is designing binder that forms liquid wetting cBN and reacts with cBN forming hard compounds or solidfies with good hardness and thermal stability. Sintering of various cBN-binder mixtures and mechanical properties of thus prepared composites will be discussed including the transition behavior of cBN.