**8. Conclusions**

This paper gives a state of art and recent development toward various techniques to extend the lifetime of cutting tool and to improve the mechanical and tribological properties of the material. Various study revealed that graphene attracts particular interests in latest for cutting tool development due to its unique properties like high temperature operations, high mechanical strength, high thermal conductivity, and its self-lubricating properties. Previous studied has also showed that properties and microstructure of the composite depend upon strongly SPS conditions. Mostly, graphite is used as solid lubricant to improve the efficiency of various carbide tool materials; however, the study of multilayer graphene to make carbide tools as self-lubricant was relatively few. Results showed that MLG can act as not only an exceptional reinforcement phase but also act as superior self-lubricant phase. Very few Investigations have done on Graphite as reinforcement. Since not much research was done on machining and tribological analysis of fabricate cutting tool insert so far, there are lot of aspects which require improvement. More work should be done to obtain composites with higher homogeneity, which will result in fabricating samples with even better mechanical properties and higher density. Spark Plasma Sintering process seems good method for sintering powders where no degradation to graphene is required. It is strongly recommended that more in-depth studies will be carried out with regard to the preparation of composite, which leads to better mechanical parameters for obtained composites, comparable with commercial insert.
