Cemented carbides are composite materials manufactured via powder metallurgy. The excellent wear resistance, high hardness, and high toughness make them widely used materials in cutting and drilling tools. In order to develop environmental friendly cemented carbides with enhanced mechanical properties, our current research interests are oriented on the novel carbide mixtures and Co-free binder phases. The proposed in-situ high resolution neutron powder diffraction experiments will enable us to gain a better understanding of the diffusion-driven microstructural evolution of novel cemented carbide materials. Since the microstructure evolution of cemented carbides has not been investigated using neutron scattering before, we expect a valuable scientific output from the successful experiments.